CN103100803B - Nickelic austenite ductile iron gas solder wire - Google Patents
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- CN103100803B CN103100803B CN201310036461.XA CN201310036461A CN103100803B CN 103100803 B CN103100803 B CN 103100803B CN 201310036461 A CN201310036461 A CN 201310036461A CN 103100803 B CN103100803 B CN 103100803B
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- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 33
- 229910001566 austenite Inorganic materials 0.000 title claims description 5
- 229910000679 solder Inorganic materials 0.000 title 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000003466 welding Methods 0.000 claims abstract description 38
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 32
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 6
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 5
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 229910052761 rare earth metal Inorganic materials 0.000 claims 1
- 150000002910 rare earth metals Chemical class 0.000 claims 1
- 238000005266 casting Methods 0.000 abstract description 8
- 229910001060 Gray iron Inorganic materials 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 239000011651 chromium Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- -1 respectively Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
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- Arc Welding In General (AREA)
Abstract
本发明公开了一种高镍奥氏体球铁气焊丝，由以下组分按质量百分比组成：C为2.6％~3.6％、Si为3.0％~3.6％、Mn为1.0％~1.6％、Ni为32％~37％、Bi为0.02％~0.05％、Mg为0.05％~0.08％、Cr为1.8％~3.6％，S<0.05％、P<0.05％、其余为Fe。本发明的高镍奥氏体球铁气焊丝，能够在室温或较低温度下施焊，实现高镍奥氏体球铁的焊接，焊缝成分、组织和性能与铸件本体一致；而且能够适应于球铁和灰铁铸件的焊接修复。The invention discloses a high-nickel austenitic nodular iron gas welding wire, which is composed of the following components in mass percentage: 2.6%-3.6% of C, 3.0%-3.6% of Si, 1.0%-1.6% of Mn, Ni 32%~37%, Bi 0.02%~0.05%, Mg 0.05%~0.08%, Cr 1.8%~3.6%, S<0.05%, P<0.05%, and the rest is Fe. The high-nickel austenitic nodular iron gas welding wire of the present invention can be welded at room temperature or at a lower temperature to realize welding of high-nickel austenitic nodular iron, and the composition, structure and performance of the weld seam are consistent with the casting body; For welding repair of ductile iron and gray iron castings.
Description
技术领域technical field
本发明属于焊接材料技术领域，涉及一种高镍奥氏体球铁气焊丝。The invention belongs to the technical field of welding materials, and relates to a high-nickel austenitic nodular iron gas welding wire.
背景技术Background technique
汽车工业是国民经济的支柱产业。降低能耗、减少环境污染以及节约有限的资源是当今汽车工业发展所面临的、重要而急迫解决的问题。提高发动机效率和降低废气排放污染是推动汽车发动机技术发展的核心原动力。涡轮增压器技术是提高发动机效率、降低燃油消耗、减少废气排放的有效手段。随着汽油发动机转速提高，废气进气量加大，必然导致涡轮增压器及进排气管道工作温度的大幅上升。高镍球铁涡轮增压器壳体及进排气管是新生代汽车用品的首选材料，其耐热温度达1150℃以上，属于高科技含量、高附加值产品，己成为涡轮增压器涡壳的主流发展方向，具有很强的市场竞争力。然而，高镍球铁涡壳及进排气管在生产过程中不可避免的产生各种缺陷，对缺陷铸件实施挽救修复具有极大的经济效益。The automobile industry is the pillar industry of the national economy. Reducing energy consumption, reducing environmental pollution and saving limited resources are important and urgent issues facing the development of the automobile industry today. Improving engine efficiency and reducing exhaust pollution are the core driving forces behind the development of automotive engine technology. Turbocharger technology is an effective means to improve engine efficiency, reduce fuel consumption, and reduce exhaust emissions. As the speed of the gasoline engine increases, the amount of exhaust gas intake increases, which will inevitably lead to a substantial increase in the operating temperature of the turbocharger and the intake and exhaust pipes. High-nickel ductile iron turbocharger housing and intake and exhaust pipes are the first choice materials for the new generation of automotive supplies. Its heat-resistant temperature is above 1150 ° C. It is a high-tech and high value-added product. The mainstream development direction of the shell has strong market competitiveness. However, high-nickel ductile iron volute and intake and exhaust pipes inevitably produce various defects during the production process, and it is of great economic benefit to salvage and repair defective castings.
作为特种焊接材料，高镍奥氏体球铁焊丝在高镍球铁件气焊和缺陷修复等工程领域中不可或缺。As a special welding material, high-nickel austenitic ductile iron wire is indispensable in engineering fields such as gas welding and defect repair of high-nickel ductile iron parts.
发明内容Contents of the invention
本发明的目的在于提供一种高镍奥氏体球铁气焊丝，能够在室温或较低温度下施焊，获得焊缝成分、组织和性能与铸件本体一致，为了满足高镍球铁件的高性能气焊修复需要。The purpose of the present invention is to provide a high-nickel austenitic nodular iron gas welding wire, which can be welded at room temperature or at a lower temperature, and the composition, structure and performance of the weld are consistent with the casting body. In order to meet the requirements of high-nickel nodular iron parts High performance gas welding repair needs.
本发明所采用的技术方案，一种高镍奥氏体球铁气焊丝，由以下组分按质量百分比组成：The technical solution adopted in the present invention is a high-nickel austenitic nodular iron gas welding wire, which consists of the following components by mass percentage:
C为2.6％~3.6％、Si为3.0％~3.6％、Mn为1.0％~1.6％、Ni为32％~37％、Bi为0.02％~0.05％、Mg为0.05％~0.08％、Cr为1.8％~3.6％，S<0.05％、P<0.05％、其余为Fe。C is 2.6%~3.6%, Si is 3.0%~3.6%, Mn is 1.0%~1.6%, Ni is 32%~37%, Bi is 0.02%~0.05%, Mg is 0.05%~0.08%, Cr is 1.8%~3.6%, S<0.05%, P<0.05%, the rest is Fe.
本发明的有益效果是：1）焊缝色泽与高镍球铁铸件本体一致；2）焊缝成份和组织为典型的高镍奥氏体球铁组织；3）焊缝强度与和硬度与高镍球铁铸件本体基本一致；4）焊缝抗裂性强；5）焊接温度在室温～200℃范围，实现了高镍球铁铸件的不预热焊接和焊补；6）还能够适于灰铸铁、球墨铸铁件的焊接修复。The beneficial effects of the present invention are: 1) The color of the weld is consistent with the body of the high-nickel ductile iron casting; 2) The composition and structure of the weld are typical high-nickel austenite ductile iron; 3) The strength and hardness of the weld are consistent with high The body of the nickel ductile iron casting is basically the same; 4) The weld seam has strong crack resistance; 5) The welding temperature is in the range of room temperature to 200 °C, which realizes the non-preheating welding and welding repair of the high nickel ductile iron casting; 6) It is also suitable for Welding repair of gray cast iron and ductile iron castings.
具体实施方式Detailed ways
本发明的高镍奥氏体球铁气焊丝，由以下组分按质量百分比组成：The high-nickel austenitic nodular iron gas welding wire of the present invention consists of the following components by mass percentage:
C为2.6％~3.6％、Si为3.0％~3.6％、Mn为1.0％~1.6％、Ni为32％~37％、Bi为0.02％~0.05％、Mg为0.05％~0.08％、Cr为1.8％~3.6％，S<0.05％、P<0.05％、其余为Fe。C is 2.6%~3.6%, Si is 3.0%~3.6%, Mn is 1.0%~1.6%, Ni is 32%~37%, Bi is 0.02%~0.05%, Mg is 0.05%~0.08%, Cr is 1.8%~3.6%, S<0.05%, P<0.05%, the rest is Fe.
本发明的气焊丝成份中，各组成物的含量限定理由分别叙述如下：In the gas welding wire composition of the present invention, the content limitation reason of each constituent is described as follows respectively:
为了使焊缝金属获得高镍奥氏体球铁组织，防止出现焊缝片状石墨和熔合区白口化，保证焊接（补）区的机械加工性能，焊丝中含碳量和含硅量均有较严控制，加入量分别为C2.6％~3.6％和Si3.0％~3.6％；为了获得奥氏体基体的焊缝组织，焊丝中加入了高含量的镍Ni32％~37％；为了保障焊缝中碳化物的含量，有必要加入一定量的铬Cr1.8％~3.6％；为了净化焊缝金属，减小S、O等有害杂质元素的影响，焊丝中还加入了Mg，Mg以球化剂的形式加入，球化剂优选无稀土的NiMgSi；为了改善焊缝金属机械性能，加入少量的Mn，Mn同时还兼具脱S、脱O的作用；为了细化晶粒、促进石墨球析出，还添加了微量的Bi元素，铋的加入，不仅可显著细化焊缝中的石墨球，而且能改善石墨球的圆整度。In order to obtain a high-nickel austenitic nodular iron structure in the weld metal, prevent flake graphite in the weld and whitening of the fusion zone, and ensure the machining performance of the welding (replenishing) zone, the carbon content and silicon content in the welding wire are balanced. There is strict control, and the addition amounts are C2.6%~3.6% and Si3.0%~3.6% respectively; in order to obtain the weld structure of the austenite matrix, a high content of nickel Ni32%~37% is added to the welding wire; In order to ensure the content of carbides in the weld, it is necessary to add a certain amount of chromium Cr1.8%~3.6%; in order to purify the weld metal and reduce the influence of harmful impurity elements such as S and O, Mg is also added to the welding wire. Mg is added in the form of a nodulizer, and the nodulizer is preferably rare earth-free NiMgSi; in order to improve the mechanical properties of the weld metal, a small amount of Mn is added, and Mn also has the functions of removing S and O; in order to refine the grain, To promote the precipitation of graphite balls, a small amount of Bi element is also added. The addition of bismuth can not only significantly refine the graphite balls in the weld, but also improve the roundness of graphite balls.
本发明的高镍奥氏体球铁气焊丝的制备方法是，采用电炉熔配低杂质含量的铁液，用Bi元素对铁液进行合金化处理，经炉前球化、孕育处理后，浇注成高镍奥氏体球墨铸铁气焊丝，即成。The preparation method of the high-nickel austenitic nodular iron gas welding wire of the present invention is to use an electric furnace to melt molten iron with low impurity content, carry out alloying treatment on the molten iron with Bi element, and after being spheroidized and inoculated in front of the furnace, pouring Into high nickel austenitic ductile iron gas welding wire, Serve.
以下7个实施例中，本发明高镍奥氏体球铁气焊丝的具体化学成份如表1所示，利用本发明高镍奥氏体球墨铸铁气焊丝分别焊接高镍奥氏体球铁、球墨铸铁和灰铁试件，分别获得熔敷金属的化学成份如表2所示，气焊丝熔敷金属的力学性能如表3所示，各表中，序号1、2、3均为本发明的气焊丝用于焊接高镍奥氏体球墨铸铁母材的实施例，序号4、5均为本发明的气焊丝用于焊接球墨铸铁母材的实施例，序号6、7均为本发明的气焊丝用于焊接灰铸铁母材的实施例。In the following 7 embodiments, the specific chemical composition of the high-nickel austenitic ductile iron gas welding wire of the present invention is as shown in Table 1, and the high-nickel austenitic ductile iron gas welding wire of the present invention is used to weld high-nickel austenitic nodular iron, respectively, Ductile iron and gray iron test piece, respectively obtain the chemical composition of deposited metal as shown in Table 2, the mechanical properties of gas welding wire deposited metal as shown in Table 3, in each table, sequence number 1, 2, 3 are the present invention The gas welding wire is used for welding the embodiment of high-nickel austenitic nodular cast iron base material, serial numbers 4 and 5 are all gas welding wires of the present invention are used for welding the embodiment of ductile iron base material, and serial numbers 6 and 7 are all of the present invention Examples of gas welding wire used for welding gray cast iron base metal.
表1本发明七个实施例气焊丝的具体组分对比表（质量%）Table 1 Concrete component comparison table of gas welding wire of seven embodiments of the present invention (mass %)
表2本发明七个实施例气焊丝分别用于焊接高镍奥氏体球铁、球墨铸铁、灰铁所得熔敷金属化学成份对照表（质量%）Table 2 Comparison table of chemical composition of deposited metal obtained by welding high-nickel austenitic nodular iron, nodular cast iron and gray iron with gas welding wire according to seven embodiments of the present invention (mass %)
表3本发明七个实施例高镍球铁气焊丝熔敷金属的力学性能对照表（质量%）Table 3 Comparison table of mechanical properties of deposited metal of high nickel ductile iron gas welding wire in seven embodiments of the present invention (mass %)
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| CN112475668A (en) * | 2020-11-16 | 2021-03-12 | 中国第一汽车股份有限公司 | Gas welding wire for cast iron repair welding and manufacturing process thereof |
| CN113699433A (en) * | 2021-09-07 | 2021-11-26 | 鹰普机械（宜兴）有限公司 | High-performance high-nickel austenitic ductile iron |
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| CN1769002A (en) * | 2005-11-17 | 2006-05-10 | 西安理工大学 | Homogeneous electrode/gas welding wire for gray and ductile iron welding |
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| AU1631283A (en) * | 1983-03-24 | 1984-09-27 | Huntington Alloys Inc. | Nickel-iron welding alloy |
| JP2791605B2 (en) * | 1990-10-24 | 1998-08-27 | アイシン高丘株式会社 | Joining method between spheroidal graphite cast iron and stainless steel |
| JP2780140B2 (en) * | 1991-03-20 | 1998-07-30 | 新日本製鐵株式会社 | Welding wire for fire-resistant steel with excellent weather resistance |
| JPH0751888A (en) * | 1993-08-18 | 1995-02-28 | Nkk Corp | High Si content stainless steel welding wire for high temperature and high concentration sulfuric acid |
| FR2939340B1 (en) * | 2008-12-09 | 2010-12-31 | Air Liquide | FLOW AND WIRE FOR SUBMERGED ARC WELDING OF CRMOV STEELS. |
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| CN1769002A (en) * | 2005-11-17 | 2006-05-10 | 西安理工大学 | Homogeneous electrode/gas welding wire for gray and ductile iron welding |
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| Title |
|---|
| Ni-Fe-C焊丝TIG焊WC-Co与钢组织和性能研究;王浩;《大连交通大学学位论文》;20041231;第15,17和35页 * |
| 高镍球铁球化工艺及其组织控制;王志斌;《2012中国铸造活动周论文集》;20121022;第285-290页 * |
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Denomination of invention: High nickel austenitic ductile iron gas welding wire Granted publication date: 20150218 Pledgee: Jinlong Sub Branch of Hunan Xiangyin Rural Commercial Bank Co.,Ltd. Pledgor: HUNAN XIMUXI TECHNOLOGY Co.,Ltd. Registration number: Y2024980013241 |