JP2002206124A - Method for producing Ti alloy sintered body - Google Patents
Method for producing Ti alloy sintered bodyInfo
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- JP2002206124A JP2002206124A JP2001000091A JP2001000091A JP2002206124A JP 2002206124 A JP2002206124 A JP 2002206124A JP 2001000091 A JP2001000091 A JP 2001000091A JP 2001000091 A JP2001000091 A JP 2001000091A JP 2002206124 A JP2002206124 A JP 2002206124A
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属粉末射出成形
法によるＴｉ合金焼結体の製造方法に関する。[0001] The present invention relates to a method for producing a Ti alloy sintered body by a metal powder injection molding method.
【０００２】[0002]
【従来の技術】金属粉末射出成形法は、金属粉末と多量
の有機バインダーとの組成物を所定形状の金型内に射出
成形して成形体とし、該成形体を脱バインダー処理後、
焼結して焼結金属製品とする方法である。従来より、Ｔ
ｉの合金粉末又はＴｉ粉末と他の金属との混合粉末を射
出成形することにより、Ｔｉ合金焼結体は製造されてい
るが、成形性に問題が生じたり、前記の有機バインダー
の分解により生じた炭素により焼結体中にＴｉ炭化物が
生成し、特に破断伸び等の機械的性質が劣っているとい
う問題があった。2. Description of the Related Art In a metal powder injection molding method, a composition of a metal powder and a large amount of an organic binder is injection-molded into a mold having a predetermined shape to form a molded body.
This is a method of sintering to a sintered metal product. Conventionally, T
Although the Ti alloy sintered body is manufactured by injection molding of the alloy powder of i or the mixed powder of the Ti powder and another metal, a problem arises in the formability or the decomposition of the organic binder causes the problem. There has been a problem that Ti carbides are generated in the sintered body by the carbon and the mechanical properties such as elongation at break are particularly poor.
【０００３】[0003]
【発明が解決しようとする課題】本発明は、上記の実状
に鑑みてなされたものであり、射出成形時の成形性に優
れ、焼結体中のＴｉ炭化物の生成を抑制し、破断伸び等
の機械的特性が優れたＴｉ合金焼結体の製造方法を提供
することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, has excellent moldability at the time of injection molding, suppresses the formation of Ti carbide in a sintered body, and has an elongation at break. An object of the present invention is to provide a method for producing a Ti alloy sintered body having excellent mechanical properties.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
本発明は、平均粒径が５０μｍ以下であり、含有酸素量
が０．３５重量％以下のＴｉ粉末と、平均粒径が３５μ
ｍ以下のＦｅ粉末、Ｎｉ粉末、Ｗ粉末、Ｍｏ粉末、Ａｌ
−Ｖ合金粉末のうちから選ばれた少なくとも１種以上の
粉末を１．５〜１５重量％含有せしめた混合粉末に、バ
インダー全体当たり、５〜３０容量％の解重合型結合材
を含む有機バインダーを添加して混練した組成物を射出
成形し、得られた成形体を脱バインダー処理し、さら
に、金属製もしくはセラミクス製の囲繞体により前記脱
バインダー処理した成形体を囲い、該成形体を焼結する
ことを特徴とするＴｉ合金焼結体の製造方法である。To achieve the above object, the present invention provides a Ti powder having an average particle size of 50 μm or less and an oxygen content of 0.35% by weight or less, and a Ti powder having an average particle size of 35 μm or less.
m or less Fe powder, Ni powder, W powder, Mo powder, Al
An organic binder containing 5 to 30% by volume of a depolymerization-type binder based on the entire binder in a mixed powder containing 1.5 to 15% by weight of at least one powder selected from -V alloy powders The mixture obtained by kneading and kneading is injection-molded, the obtained molded body is subjected to a binder removal treatment, and further, the molded body subjected to the binder removal treatment is surrounded by a metal or ceramic enclosure, and the molded body is fired. And a method for producing a Ti alloy sintered body.
【０００５】[0005]
【発明の実体の形態】以下本発明を詳細に説明する。 （焼結用粉末）使用する原料粉末としては、平均粒径が
５０μｍ以下で含有酸素量が０．３５重量％以下のＴｉ
粉末および平均粒径が３５μｍ以下のＦｅ粉末、Ｎｉ粉
末、Ｗ粉末、Ｍｏ粉末、Ａｌ−Ｖ合金粉末の内から選ば
れた１種以上を使用する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below. (Powder for sintering) As raw material powder to be used, Ti having an average particle size of 50 μm or less and an oxygen content of 0.35% by weight or less is used.
One or more selected from powder and Fe powder, Ni powder, W powder, Mo powder, and Al-V alloy powder having an average particle diameter of 35 μm or less are used.
【０００６】市販のＴｉ粉末あるいはＴｉ合金粉末は、
金属粉末射出成形用としては、粒径の粗いものが多く、
成形時の流動性が低下したり、成形体重量の変動が大き
く、結果として焼結体寸法にバラツキが生じるが、平均
粒径が３５μｍ以下のＦｅ粉末、Ｎｉ粉末、Ｗ粉末、Ｍ
ｏ粉末、Ａｌ−Ｖ合金の内から選ばれた１種以上の微粉
末と混合することにより、成形時の流動性、成形体の重
量バラツキが改善される。[0006] Commercially available Ti powder or Ti alloy powder is
For metal powder injection molding, there are many coarse particles,
Fluidity at the time of molding is reduced, and the weight of the molded body varies greatly. As a result, the dimensions of the sintered body vary, but the average particle diameter of Fe powder, Ni powder, W powder,
By mixing with at least one fine powder selected from the group consisting of an o-powder and an Al-V alloy, the fluidity during molding and the variation in weight of the compact are improved.
【０００７】また、Ｔｉ粉末中の含有酸素量が、０．３
５重量％を越えると破断伸びが大幅に低下するので、
０．３５重量％を本発明の方法における含有酸素量の上
限とした。Further, the oxygen content in the Ti powder is 0.3
If it exceeds 5% by weight, the elongation at break is greatly reduced.
0.35% by weight was defined as the upper limit of the oxygen content in the method of the present invention.
【０００８】一方、Ｔｉ粉末と混合する金属粉末をＦｅ
粉末、Ｎｉ粉末、Ｗ粉末、Ｍｏ粉末、Ａｌ−Ｖ合金粉末
としたのは、純Ｔｉと比較して引張強さが向上し、破断
伸びが劣化しない元素の金属粉末を選定したものであ
る。On the other hand, the metal powder mixed with the Ti powder is Fe
The powders, Ni powders, W powders, Mo powders, and Al-V alloy powders are selected from metal powders of elements that have improved tensile strength compared to pure Ti and do not degrade elongation at break.
【０００９】また、添加する金属元素の割合を全体の
１．５〜１５重量％としたのは、１．５重量％未満では
引張強さの向上が小さく、１５重量％を越えると破断伸
びが低下する原因となるので、これら元素の添加範囲を
１．５〜１５重量％と限定した。The reason why the ratio of the metal element to be added is set to 1.5 to 15% by weight is that when the amount is less than 1.5% by weight, the improvement in tensile strength is small, and when it exceeds 15% by weight, the elongation at break increases. Therefore, the range of addition of these elements is limited to 1.5 to 15% by weight.
【００１０】（バインダー)金属粉末射出成形に用いる
有機バインダーは、一般的に射出成形時に粉末に流動性
を与える滑剤と成形体に形状保持性を与える結合剤とか
らなる。滑剤としては、パラフィンワックス、カルナバ
ワックス、マイクロクリスタリンワックス、低分子量ポ
リエチレンワックス、変成ワックス、モンタン系エステ
ルワックス類が使用される。(Binder) The organic binder used for metal powder injection molding generally comprises a lubricant that gives fluidity to the powder during injection molding and a binder that gives shape retention to the molded product. As the lubricant, paraffin wax, carnauba wax, microcrystalline wax, low molecular weight polyethylene wax, modified wax, and montan ester wax are used.
【００１１】結合剤としてはバインダー全体当たり、５
〜３０容量％の解重合型結合材を使用する。一般的に使
用されるポリエチレン、ポリプロピレン、エチレン−酢
酸ビニル共重合体等の高分子材料は、脱バインダ時に分
解しにくいランダム分解型の樹脂であり、揮発分解しな
いで炭素となって残留しやすく、残留炭素とＴｉが反応
して炭化物を形成し、焼結体の破断伸びが低下する原因
となっていたが、分子の末端部から切れ、炭素が残留し
にくい解重合型の樹脂を結合材の一部として使用するこ
とにより、炭化物の形成を抑制できる。[0011] As the binder, 5
-30% by volume of depolymerized binder is used. Commonly used polymer materials such as polyethylene, polypropylene, and ethylene-vinyl acetate copolymer are random decomposition type resins that are not easily decomposed at the time of binder removal, and are likely to remain as carbon without being volatilely decomposed, Residual carbon and Ti react with each other to form carbides, causing a decrease in the elongation at break of the sintered body. By using as a part, formation of carbides can be suppressed.
【００１２】また、この解重合型結合材の含有量が５容
量％未満では、結合材としての保形性が不十分であり、
３０容量％を越えると成形体が脆くなるため、５〜３０
容量％と限定した。When the content of the depolymerized binder is less than 5% by volume, the shape retention of the binder is insufficient.
If it exceeds 30% by volume, the molded body becomes brittle, and
Limited to volume%.
【００１３】また必要に応じて、滑材、結合材の他に分
散剤や表面活性剤として、ステアリン酸、オレイン酸、
ホウ酸エステル等を添加しても良い。[0013] If necessary, stearic acid, oleic acid,
A borate ester or the like may be added.
【００１４】（焼結用粉末とバインダーとの混練・造
粒）上記金属粉末とバインダーとを加熱し、均一に混ぜ
合わせる工程が混練工程であるが、金属粒子の一粒一粒
がバインダーで包み込まれる処理ができる様な混練機を
選定して混練する。また、造粒は金属粉末とバインダー
とを混練した組成物をペレット状にする工程であるが、
粒の大きさが不均一であると次工程の射出成形を行う
際、射出成形機内への組成物の供給量が不安定となり、
成形体重量のバラツキが生じ、結果として最終製品の寸
法精度が悪くなるので、可能な限り均一な粒に揃えるこ
とが必要である。(Kneading and granulation of sintering powder and binder) The step of heating and uniformly mixing the metal powder and the binder is a kneading step. Each metal particle is wrapped in the binder. A kneader capable of performing the following processing is selected and kneaded. Also, granulation is a step of pelletizing a composition obtained by kneading a metal powder and a binder,
When the size of the particles is non-uniform, when performing the injection molding in the next step, the supply amount of the composition into the injection molding machine becomes unstable,
Variations in the weight of the molded body occur, resulting in poor dimensional accuracy of the final product. Therefore, it is necessary to make the grains as uniform as possible.
【００１５】（射出成形）造粒した組成物を用いて所定
形状の金型に射出成形することによって、成形体を得
る。射出成形機および金型については、通常のプラスチ
ック用の成形機、金型で問題ないが、焼結後の製品は、
成形体の大きさと比較して１５％以上は収縮するので、
その分を見込んで、金型を設計する必要がある。(Injection molding) A molded article is obtained by subjecting the granulated composition to injection molding into a mold having a predetermined shape. For injection molding machines and molds, there is no problem with ordinary plastic molding machines and molds, but products after sintering are
More than 15% shrink compared to the size of the molded body,
It is necessary to design the mold in consideration of the amount.
【００１６】（脱 脂）成形体からバインダーを除去す
る工程が脱脂工程である。使用するバインダーの種類に
よって、加熱脱脂、溶媒脱脂、その他の公知の方法が使
用できるが、加熱脱脂装置は他の方法と比較して簡便
で、大量に処理できる利点がある。また、加熱脱脂は、
金属粉末の酸化を防止するため、非酸化性雰囲気中で行
うことが好ましい。(Degreasing) The step of removing the binder from the molded article is the degreasing step. Heat degreasing, solvent degreasing, and other known methods can be used depending on the type of binder to be used. However, the heat degreasing apparatus has the advantage of being simpler than other methods and capable of treating a large amount. In addition, heat degreasing,
In order to prevent oxidation of the metal powder, it is preferable to carry out in a non-oxidizing atmosphere.
【００１７】（焼結処理）次に脱バインダーした成形体
の焼結を行う際には、金属もしくはセラミックス製の囲
繞体によって脱バインダー処理した成形体を囲い、Ｔｉ
粉末が酸化しない様な高真空、あるいは高純度のアルゴ
ン雰囲気などで焼結を行う。(Sintering treatment) Next, when sintering the debindered compact, the debindered compact is surrounded by a metal or ceramic surrounding body,
Sintering is performed in a high vacuum or a high-purity argon atmosphere where the powder is not oxidized.
【００１８】焼結に用いる炉としては、炭素製のヒータ
ーや容器が一般的に使用されており、焼結時にはヒータ
ーや容器からの炭素の汚染により、焼結体中にＴｉ炭化
物が生成し、破断伸びが低下することがある。このよう
な炭素による汚染を防止するため、囲繞体を用いて成形
体を囲うこととした。囲繞体の材質としては、Ｔｉの焼
結体を汚染しない様な金属もしくはセラミックスを選定
することが必要である。As a furnace used for sintering, a carbon heater or container is generally used. At the time of sintering, carbon carbide from the heater or container causes Ti carbide to be generated in the sintered body, Elongation at break may decrease. In order to prevent such carbon contamination, the molded body is surrounded by the surrounding body. As the material of the surrounding body, it is necessary to select a metal or ceramic that does not contaminate the sintered body of Ti.
【００１９】[0019]
【実施例】（実施例１）粒径が４５μｍ以下、含有酸素
量が０．１３重量％の純Ｔｉ粉末９７．５％に平均粒径
５μｍのカーボニルＦｅ粉末を２．５％配合した。前記
混合粉末に、バインダー全体当たり２０容量％の解重合
型結合材を含む有機バインダーを組成物全体当たり３６
容量％加えて混練後、造粒した。EXAMPLE 1 2.5% of carbonyl Fe powder having an average particle size of 5 μm was mixed with 97.5% of pure Ti powder having a particle size of 45 μm or less and an oxygen content of 0.13% by weight. An organic binder containing 20% by volume of a depolymerization type binder based on the whole binder was added to the mixed powder in an amount of 36% based on the whole composition.
After kneading by adding volume%, the mixture was granulated.
【００２０】この造粒物を用いて射出温度１４０℃で、
射出圧力８００kgf／cm2の条件で射出成形してＪＩＳ１
４号引張試験片（ＪＩＳ Ｚ ２２０１）形状の成形体と
した。成形体の重量は約１６ｇであった。成形性の評価
は、成形体の外観および３０回連続成形した成形体の重
量バラツキ（標準偏差）によりおこなった。Using the granulated product at an injection temperature of 140 ° C.,
Injection molding under the condition of injection pressure 800kgf / cm 2 JIS1
The molded product was a No. 4 tensile test piece (JIS Z 2201). The weight of the molded body was about 16 g. The evaluation of the moldability was performed based on the appearance of the molded body and the weight variation (standard deviation) of the molded body continuously molded 30 times.
【００２１】次に、この成形体を窒素気流中で３００℃
まで加熱して脱バインダー処理を行い、脱バインダーし
た成形体をジルコニアの囲繞体で囲い、１０-5Ｔｏｒｒ
の減圧雰囲気中で、加熱速度１０℃／分で昇温し、１２
５０℃に１時間保持した後、炉冷し、焼結体を得た。Next, the compact was heated at 300 ° C. in a nitrogen stream.
The binder was removed by heating to a temperature of 10 -5 Torr.
In a reduced pressure atmosphere at a heating rate of 10 ° C./min.
After maintaining at 50 ° C. for 1 hour, the furnace was cooled to obtain a sintered body.
【００２２】この焼結体を引張試験機で引張試験を行
い、引張強さ、及び破断伸びを測定した。また、焼結体
密度、焼結後の含有酸素量、炭素量の測定を行った。そ
の結果を表１に示す。The sintered body was subjected to a tensile test using a tensile tester, and the tensile strength and the elongation at break were measured. Further, the density of the sintered body, the oxygen content after sintering, and the carbon content were measured. Table 1 shows the results.
【００２３】（実施例２）粒径が４５μｍ以下、含有酸
素量が０．１３重量％の純Ｔｉ粉末９５．０％と平均粒
径５μｍのカーボニルＦｅ粉末５．０％を配合した以外
は実施例１と同様にバインダーを加えて混練後、造粒
し、射出成形して成形体とし焼結を行い、成形性と、焼
結体の評価を行った。結果を表１に示す。Example 2 The procedure was carried out except that 95.0% of pure Ti powder having a particle size of 45 μm or less and oxygen content of 0.13% by weight and 5.0% of carbonyl Fe powder having an average particle size of 5 μm were blended. A binder was added and kneaded in the same manner as in Example 1, and the mixture was granulated, injection-molded and formed into a molded body, sintered, and evaluated for moldability and the sintered body. Table 1 shows the results.
【００２４】（実施例３）粒径が４５μｍ以下、含有酸
素量が０．１３重量％の純Ｔｉ粉末９０．０％と平均粒
径５μｍのカーボニルＦｅ粉末１０．０％を配合した以
外は実施例１と同様にバインダーを加えて混練後、造粒
し、射出成形して成形体とし焼結を行った。実施例１と
同様に、成形性と、焼結体の評価を行った。結果を表１
に示す。Example 3 The procedure was carried out except that 90.0% of pure Ti powder having a particle diameter of 45 μm or less and oxygen content of 0.13% by weight and 10.0% of carbonyl Fe powder having an average particle diameter of 5 μm were blended. In the same manner as in Example 1, a binder was added and kneaded, followed by granulation, injection molding, and sintering. In the same manner as in Example 1, the moldability and the sintered body were evaluated. Table 1 shows the results
Shown in
【００２５】（実施例４）粒径が４５μｍ以下、含有酸
素量が０．１３重量％の純Ｔｉ粉末９５．０％と平均粒
径５μｍのＮｉ粉末５．０％を配合した以外は実施例１
と同様にバインダーを加えて混練後、造粒し、射出成形
して成形体とし焼結を行った。実施例１と同様に、成形
性と、焼結体の評価を行った。結果を表１に示す。Example 4 Example 9 except that 95.0% of pure Ti powder having a particle diameter of 45 μm or less and oxygen content of 0.13% by weight and 5.0% of Ni powder having an average particle diameter of 5 μm were blended. 1
In the same manner as described above, a binder was added, kneaded, granulated, injection molded, and sintered. In the same manner as in Example 1, the moldability and the sintered body were evaluated. Table 1 shows the results.
【００２６】（実施例５）粒径が４５μｍ以下、含有酸
素量が０．１３重量％の純Ｔｉ粉末９５．０％と平均粒
径３μｍのＷ粉末５．０％を配合した以外は実施例１と
同様にバインダーを加えて混練後、造粒し、射出成形し
て成形体とし焼結を行った。実施例１と同様に、成形性
と、焼結体の評価を行った。結果を表１に示す。Example 5 Example 9 was repeated except that 95.0% of pure Ti powder having a particle size of 45 μm or less and oxygen content of 0.13% by weight and 5.0% of W powder having an average particle size of 3 μm were blended. A binder was added and kneaded in the same manner as in Example 1, and the mixture was granulated, injection-molded, formed into a molded body, and sintered. In the same manner as in Example 1, the moldability and the sintered body were evaluated. Table 1 shows the results.
【００２７】（実施例６）粒径が４５μｍ以下、含有酸
素量が０．１３重量％の純Ｔｉ粉末９５．０％と平均粒
径３μｍのＭｏ粉末５．０％を配合した以外は実施例１
と同様にバインダーを加えて混練後、造粒し、射出成形
して成形体とし焼結を行った。実施例１と同様に、成形
性と、焼結体の評価を行った。結果を表１に示す。Example 6 Example 9 was the same as Example 9 except that 95.0% of pure Ti powder having a particle size of 45 μm or less and oxygen content of 0.13% by weight and 5.0% of Mo powder having an average particle size of 3 μm were blended. 1
In the same manner as described above, a binder was added, kneaded, granulated, injection molded, and sintered. In the same manner as in Example 1, the moldability and the sintered body were evaluated. Table 1 shows the results.
【００２８】（実施例７）粒径が４５μｍ以下、含有酸
素量が０．１３重量％の純Ｔｉ粉末９０．０％と平均粒
径２０μｍの４０重量％Ｖ−Ａｌ合金１０％を配合した
以外は実施例１と同様にバインダーを加えて混練後、造
粒し、射出成形して成形体とし焼結を行った。実施例１
と同様に、成形性と、焼結体の評価を行った。結果を表
１に示す。Example 7 Except that 90.0% of pure Ti powder having a particle diameter of 45 μm or less and an oxygen content of 0.13% by weight and 10% of a 40% by weight V-Al alloy having an average particle diameter of 20 μm were blended. In the same manner as in Example 1, a binder was added and kneaded, followed by granulation, injection molding, and sintering. Example 1
Similarly to the above, the moldability and the sintered body were evaluated. Table 1 shows the results.
【００２９】（比較例１）平均粒径が６０μｍ、含有酸
素量が０．２３重量％の純Ｔｉ粉末９５．０％と平均粒
径５μｍのカーボニル鉄粉末を５．０重量％添加した以
外は、実施例１と同様に試料を作製し、評価した。その
試験結果を表１に示すが、純Ｔｉの平均粒径が粗いた
め、射出成形時の流動性が不十分で、成形体の外観が悪
く、成形体重量のバラツキも大きかった。Comparative Example 1 Except that 95.0% of pure Ti powder having an average particle diameter of 60 μm and oxygen content of 0.23% by weight and 5.0% by weight of carbonyl iron powder having an average particle diameter of 5 μm were added. A sample was prepared and evaluated in the same manner as in Example 1. The test results are shown in Table 1. The average particle size of the pure Ti was so coarse that the fluidity at the time of injection molding was insufficient, the appearance of the molded article was poor, and the variation in the weight of the molded article was large.
【００３０】（比較例２）平均粒径が１０μｍ、含有酸
素量が０．４２重量％の純Ｔｉ粉末９５．０％と平均粒
径５μｍのカーボニル鉄粉末を５．０重量％添加した以
外は、実施例１と同様に試料を作製し、同様に評価し
た。その試験結果を表１に示すが、純Ｔｉ粉末中の含有
酸素量が多いため、得られた焼結体の含有酸素量が多
く、焼結体の破断伸びも低かった。Comparative Example 2 Except that 95.0% of pure Ti powder having an average particle size of 10 μm and oxygen content of 0.42% by weight and 5.0% by weight of carbonyl iron powder having an average particle size of 5 μm were added. A sample was prepared in the same manner as in Example 1 and evaluated in the same manner. The test results are shown in Table 1. As a result, since the pure Ti powder contained a large amount of oxygen, the obtained sintered body had a large amount of oxygen and the sintered body had a low elongation at break.
【００３１】（比較例３）平均粒径が４５μｍ以下、含
有酸素量が０．１３重量％の純Ｔｉ粉末９５．０％に平
均粒径４０μｍのＦｅ粉末を５．０重量％添加した以外
は、実施例１と同様に試料を作製し、同様に評価した。
その試験結果を表１に示すが、Ｆｅ粉末の平均粒径が粗
いため、射出成形時の流動性が不十分であり、成形体の
外観が悪く、成形体重量のバラツキも大きかった。Comparative Example 3 Except that 5.0 wt% of an Fe powder having an average particle size of 40 μm was added to 95.0% of pure Ti powder having an average particle size of 45 μm or less and an oxygen content of 0.13 wt%. A sample was prepared in the same manner as in Example 1 and evaluated in the same manner.
The test results are shown in Table 1. The average particle size of the Fe powder was coarse, so that the fluidity during injection molding was insufficient, the appearance of the molded body was poor, and the variation in the weight of the molded body was large.
【００３２】（比較例４）平均粒径が４５μｍ以下、含
有酸素量が０．１３重量％の純Ｔｉ粉末９５．０％に平
均粒径５μｍのＦｅ粉末を５．０重量％添加した混合粉
末を用い、結合材としてバインダー全体当たり３０容量
％のポリプロピレン樹脂を含む有機バインダーを組成物
全体当たり３８容量％加え実施例１と同様に試料を作製
し、同様に評価した。その試験結果を表１に示すが、解
重合型の結合材を使用していないため、焼結体の含有炭
素量が多く、破断伸びも低かった。Comparative Example 4 Mixed powder obtained by adding 5.0% by weight of Fe powder having an average particle size of 5 μm to 95.0% of pure Ti powder having an average particle size of 45 μm or less and an oxygen content of 0.13% by weight. A sample was prepared in the same manner as in Example 1 by adding 38% by volume of an organic binder containing 30% by volume of a polypropylene resin to the entire binder as a binder, and evaluated in the same manner as in Example 1. The test results are shown in Table 1. Since no depolymerized binder was used, the sintered body had a large carbon content and a low elongation at break.
【００３３】（比較例５）平均粒径が４５μｍ以下、含
有酸素量が０．１３重量％の純Ｔｉ粉末９５．０％に平
均粒径５μｍのＦｅ粉末を５．０重量％添加した混合粉
末を用い、脱バインダーした成形体をジルコニアの囲繞
体で囲わなかった以外は、実施例１と同様に試料を作製
し、同様に評価した。その試験結果を表１に示すが、囲
繞体で囲わなかったため、焼結体の含有炭素量が多く、
破断伸びも低かった。Comparative Example 5 A mixed powder obtained by adding 5.0 wt% of an Fe powder having an average particle size of 5 μm to 95.0% of pure Ti powder having an average particle size of 45 μm or less and an oxygen content of 0.13 wt%. A sample was prepared and evaluated in the same manner as in Example 1 except that the debindered molded body was not surrounded by a zirconia surrounding body. The test results are shown in Table 1. Since the surroundings were not enclosed, the sintered body had a large carbon content,
The breaking elongation was also low.
【００３４】表１に示すとおり、本発明の実施例に係わ
るＴｉ合金焼結体の製造方法によれば、比較例に比べ、
成形性と、焼結体の機械的性質の優れた射出成形焼結合
金を得ることができる。As shown in Table 1, according to the method for manufacturing a Ti alloy sintered body according to the example of the present invention,
An injection-molded sintered alloy having excellent formability and mechanical properties of the sintered body can be obtained.
【００３５】[0035]
【発明の効果】本発明によれば、機械的性質、特に、破
断伸びに優れた射出成形法によるＴｉ合金焼結体を製造
することができる。According to the present invention, it is possible to manufacture a Ti alloy sintered body by an injection molding method having excellent mechanical properties, particularly, excellent elongation at break.
【００３６】[0036]
【表１】 [Table 1]
Claims (1)
０．３５重量％以下のＴｉ粉末と、平均粒径が３５μｍ
以下のＦｅ粉末、Ｎｉ粉末、Ｗ粉末、Ｍｏ粉末、Ａｌ−
Ｖ合金粉末から選ばれた少なくとも１種以上の粉末を
１．５〜１５重量％含有せしめた混合粉末に、バインダ
ー全体当たり、５〜３０容量％の解重合型結合材を含む
有機バインダーを添加して混練した組成物を射出成形
し、得られた成形体を脱バインダー処理し、さらに、金
属製もしくはセラミクス製の囲繞体により前記脱バイン
ダー処理した成形体を囲い、該成形体を焼結するＴｉ合
金焼結体の製造方法。1. Ti powder having an average particle size of 50 μm or less and an oxygen content of 0.35% by weight or less, and a Ti powder having an average particle size of 35 μm or less.
The following Fe powder, Ni powder, W powder, Mo powder, Al-
To a mixed powder containing 1.5 to 15% by weight of at least one powder selected from V alloy powder, an organic binder containing 5 to 30% by volume of a depolymerization type binder based on the whole binder is added. Injection molding of the kneaded composition, debinding treatment of the obtained molded body, and further surrounding the debindered molded body with a metal or ceramic surrounding body, and sintering the molded body. Manufacturing method of sintered alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001000091A JP2002206124A (en) | 2001-01-04 | 2001-01-04 | Method for producing Ti alloy sintered body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001000091A JP2002206124A (en) | 2001-01-04 | 2001-01-04 | Method for producing Ti alloy sintered body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002206124A true JP2002206124A (en) | 2002-07-26 |
Family
ID=18868972
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001000091A Pending JP2002206124A (en) | 2001-01-04 | 2001-01-04 | Method for producing Ti alloy sintered body |
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| Country | Link |
|---|---|
| JP (1) | JP2002206124A (en) |
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| JP2011044321A (en) * | 2009-08-20 | 2011-03-03 | Mitsubishi Materials Corp | Manufacturing method of separator with gas diffusion layer for fuel cell |
| WO2011152553A1 (en) * | 2010-05-31 | 2011-12-08 | 東邦チタニウム株式会社 | Titanium alloy compound powder combined with copper powder, chrome powder or iron powder, titanium alloy material using said powder as raw material and production method thereof |
| US20140334964A1 (en) * | 2011-11-29 | 2014-11-13 | Osamu Kanou | Alpha + beta or beta titanium alloy and method for producing same |
| WO2017045146A1 (en) * | 2015-09-16 | 2017-03-23 | Baoshan Iron & Steel Co., Ltd. | Powder metallurgy titanium alloys |
| CN106571281A (en) * | 2016-11-04 | 2017-04-19 | 北京有色金属研究总院 | Novel gas absorption element batch preparation method |
| CN115365489A (en) * | 2021-05-18 | 2022-11-22 | 精工爱普生株式会社 | Composition for injection molding, injection molded body, and method for producing titanium sintered body |
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| WO2011152553A1 (en) * | 2010-05-31 | 2011-12-08 | 東邦チタニウム株式会社 | Titanium alloy compound powder combined with copper powder, chrome powder or iron powder, titanium alloy material using said powder as raw material and production method thereof |
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| CN106571281A (en) * | 2016-11-04 | 2017-04-19 | 北京有色金属研究总院 | Novel gas absorption element batch preparation method |
| CN115365489A (en) * | 2021-05-18 | 2022-11-22 | 精工爱普生株式会社 | Composition for injection molding, injection molded body, and method for producing titanium sintered body |
| CN115365489B (en) * | 2021-05-18 | 2023-11-10 | 精工爱普生株式会社 | Composition for injection molding, injection molded body, and method for producing titanium sintered body |
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