CN105951001A - 低自噪声特种钢及其加工方法 - Google Patents
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 76
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- GVEHJMMRQRRJPM-UHFFFAOYSA-N chromium(2+);methanidylidynechromium Chemical compound [Cr+2].[Cr]#[C-].[Cr]#[C-] GVEHJMMRQRRJPM-UHFFFAOYSA-N 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/28—Normalising
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/20—Carburising
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Abstract
本发明所提供的低自噪声特种钢,其成分质量百分比为:含有碳0.01~0.03%,铬13~17%,镍7~8%,铜0.1~0.12%,镁0.4~0.5%,锰0.1~0.12%,其余为铁。本发明所提供的特种钢可以应用于耐硝酸、冷磷酸、有机酸及盐、碱溶液腐蚀的设备零件。增加了合金材料类别、调整了各种材料元素的比例成分,在制备材料中增加镍、铬、铜、镁、锰等,使得特种钢中含有合理配比的镍、铬、铜、镁、锰等元素,大大增加特种钢材的耐磨及抗腐蚀性能,易加工成型,具备一定的减震性能,自噪声较低,解决了零件易磨损、易生锈的问题,延长其使用寿命。
Description
技术领域
本发明属于冶金技术领域,涉及一种特种钢,具体涉及一种耐磨耐蚀的特种钢及其加工方法。
背景技术
特种钢也叫合金钢。在碳素钢里适量地加入一种或几种合金元素,使钢的组织结构发生变化,从而使钢具有各种不同的特殊性能。
合金钢种类很多,通常按合金元素含量多少分为低合金钢(含量<5%),中合金钢(含量5%~10%),高合金钢(含量>10%);按质量分为优质合金钢、特质合金钢;按特性和用途又分为合金结构钢、不锈钢、耐酸钢、耐磨钢、耐热钢、合金工具钢、滚动轴承钢、合金弹簧钢和特殊性能钢(如软磁钢、永磁钢、无磁钢)等。在钢中除含铁、碳和少量不可避免的硅、锰、磷、硫元素以外,还含有一定量的合金元素,钢中的合金元素有硅、锰、钼、镍、硌、矾、钛、铌、硼、铅、稀土等其中的一种或几种,这种钢叫合金钢。各国的合金钢系统,随各自的资源情况、生产和使用条件不同而不同,国外以往曾发展镍、硌钢系统,我国则发现以硅、锰、钒、钛、铌、硼、铅、稀土为主的合金钢系统合金钢在钢的总产量中约占百分之十几,一般是在电炉中冶炼的按用途可以把合金钢分为8大类,它们是:合金结构钢、弹簧钢、轴承钢、合金工具钢、高速工具钢、不锈钢、耐热不起皮钢,电工用硅钢。
在工业生产中,有些化工生产设备中的某些部件在使用过程中不仅要经受磨损,同时耐硝酸、冷磷酸、有机酸及盐、碱溶液的腐蚀,因此对钢的要求较为苛刻。
同时在机械传动中,齿轮机构由于具有结构紧凑、传动比稳定、传递功率大、传动效率高、使用寿命长等优点,因而使用十分广泛。齿轮机构的主要缺点是振动和噪声较大。
发明内容
发明目的:针对现有技术中某些化工设备零件的特殊要求,本发明的第一个目的是提供一种低自噪声特种钢,本发明的另一个目的是提供该低自噪声特种钢的加工方法。
技术方案:本发明所提供的低自噪声特种钢,其成分质量百分比为:含有碳0.01~0.03%,铬13~17%,镍4~8%,铜0.1~0.12%,镁0.4~0.5%,锰1~1.2%,其余为铁。
我们研究发现在普通的碳素钢中,加入铬能够有效地提高钢材的淬火性和回火阻抗性,提高钢材的强度,并且铬还可以降低碳的活度,提高钢材的浸碳性,并形成微细碳化物,可降低加热、轧制和热处理过程中的钢材表面脱碳和石墨化倾向,提高韧性和耐磨损性;但是,铬含量过高时,反而大量形成铬的碳化物,恶化钢材的弹减性能和韧性。因此,在本发明中,控制钢材中铬的含量为13~17%(质量百分比),最优含量为16%。
同时,加入少量的镍,可耐各种酸腐蚀和应力腐蚀,而且更为坚韧,有磁性和良好的可塑性,焊接性能也好;在650~1000℃高温下有较高的强度和抗氧化、抗燃气腐蚀能力。在本发明中,控制在钢材中镍的含量为4%~8%,最优含量为6%。
此外,我们还发现加入微量的铜一方面可以提高钢材耐大气腐蚀的性能,另一方面可以和锰协同作用,使得本特种钢被敲击时发出的声响相对沉闷暗哑,自噪声较低,具有一定的降噪作用,满足了对音噪要求更高的应用需求。
此外,加入少量的镁和锰,可使得钢的晶粒更加细致均匀,易加工成型,同时较之于普通钢材,其具备一定的减震性能,在具备更高的耐磨性和耐高温性的同时,进一步满足了对低自噪声、高舒适性、高安全性的应用需求。
本发明的一个优选方案为:所述低自噪声特种钢,其成分质量百分比为:含有碳0.02%,铬16%,镍6%,铜0.1%,镁0.45%,锰1.1%,其余为铁。
更进一步的,我们发现如果在上述技术方案中加入微量的铌,可以增强钢材的耐腐蚀性,研究发现,原因在于本发明在进行热处理时,呈现奥氏体+碳化物的组织,碳化物的存在,对钢的耐蚀性有很大影响,奥氏体在450~850℃下加热,由于晶界析出铬的碳化物Cr23C6,使得晶界附近的含铬量降低,引起晶间腐蚀。因此,我们在其中加入微量的铌,使之优先与碳结合形成NbC,其稳定性高,使得铬保留在基体中,避免晶界贫铬,从而减轻刚的晶界腐蚀倾向。此外,NbC在晶内析出呈弥散分布,且高温下不易长大,可以提高本发明的高温强度。对于本发明来说,铌的含量为0.3~0.8%时,最为合适,优选0.5%。
本发明含铌的一个优选方案为:所述低自噪声特种钢,其成分质量百分比为:含有碳0.02%,铬16%,镍6%,铜0.1%,镁0.45%,锰1.1%,铌0.5%,其余为铁。
本发明还公开了上述特种钢获得的方法,包括以下步骤:下料、锻造、正火、加工、渗碳、预冷淬火、低温回火、表面处理。
所述的锻造,其温度为1530~1580℃,热处理扩散退火温度1100~1150℃,4~6小时,固溶处理温度1050~1150℃,2小时,时效处理为560℃。
所述的正火温度为950℃~970℃。
所述的渗碳,渗碳温度为920℃,时间为6~8h,以丙酮为渗碳剂。
所述的预冷淬火为,预冷至870~880℃,然后进行油冷,冷却至室温。
所述的回火是在200℃时回火2~3h。
有益效果:本发明所提供的特种钢可以应用于耐硝酸、冷磷酸、有机酸及盐、碱溶液腐蚀的设备零件。增加了合金材料类别、调整了各种材料元素的比例成分,在制备材料中增加镍、铬、铜、镁、锰等,使得特种钢中含有合理配比的镍、铬、铜、镁、锰等元素,大大增加特种钢材的耐磨及抗腐蚀性能,易加工成型,具备一定的减震性能,自噪声较低,解决了零件易磨损、噪音大、易生锈的问题,延长其使用寿命。
具体实施方式:
实施例1
特种钢的成分为:碳0.01%,铬13%,镍4%,铜0.1%,镁0.4%,锰1%,其余为铁。
其加工方法为:按照上述比例,进行原料配比,混合,下料。
锻造温度为1530~1580℃,热处理扩散退火温度1100~1150℃,4小时,固溶处理温度1050~1150℃,2小时。
正火温度为950℃~970℃。加工,然后渗碳,渗碳温度为920℃,时间为6h,以丙酮为渗碳剂。
预冷至870~880℃,然后进行油冷淬火,至室温。最后在200℃时回火2h。表面处理后得到产品。经试验检测,所制得的特种钢硬度为217HBW。
实施例2
特种钢的成分为:碳0.03%,铬17%,镍8%,铜0.12%,镁0.5%,锰1.2%,其余为铁。
其加工方法为:按照上述比例,进行原料配比,混合,下料。
锻造温度为1530~1580℃,热处理扩散退火温度1100~1150℃,6小时,固溶处理温度1050~1150℃,2小时。
正火温度为950℃~970℃。加工,然后渗碳,渗碳温度为920℃,时间为8h,以丙酮为渗碳剂。
预冷至870~880℃,然后进行油冷淬火,至室温。最后在200℃时回火3h。表面处理后得到产品。经试验检测,所制得的特种钢硬度为216HBW。
实施例3
特种钢的成分为:含有碳0.02%,铬16%,镍6%,铜0.1%,镁0.45%,锰1.1%,其余为铁。
其加工方法为:按照上述比例,进行原料配比,混合,下料。
锻造温度为1530~1580℃,热处理扩散退火温度1100~1150℃,6小时,固溶处理温度1050~1150℃,2小时。
正火温度为950℃~970℃。加工,然后渗碳,渗碳温度为920℃,时间为6h,以丙酮为渗碳剂。
预冷至870~880℃,然后进行油冷淬火,至室温。最后在200℃时回火3h。表面处理后得到产品。经试验检测,所制得的特种钢硬度为218HBW。
实施例4
特种钢的成分为:碳0.01%,铬13%,镍4%,铜0.1%,镁0.4%,锰1%,铌0.3%,其余为铁。
其加工方法为:按照上述比例,进行原料配比,混合,下料。
锻造温度为1530~1580℃,热处理扩散退火温度1100~1150℃,4小时,固溶处理温度1050~1150℃,2小时。
正火温度为950℃~970℃。加工,然后渗碳,渗碳温度为920℃,时间为6h,以丙酮为渗碳剂。
预冷至870~880℃,然后进行油冷淬火,至室温。最后在200℃时回火2h。表面处理后得到产品。经试验检测,所制得的特种钢硬度为219HBW。
实施例5
特种钢的成分为:碳0.03%,铬17%,镍8%,铜0.12%,镁0.5%,锰1.2%,铌0.8%,其余为铁。
其加工方法为:按照上述比例,进行原料配比,混合,下料。
锻造温度为1530~1580℃,热处理扩散退火温度1100~1150℃,6小时,固溶处理温度1050~1150℃,2小时。
正火温度为950℃~970℃。加工,然后渗碳,渗碳温度为920℃,时间为8h,以丙酮为渗碳剂。
预冷至870~880℃,然后进行油冷淬火,至室温。最后在200℃时回火3h。表面处理后得到产品。经试验检测,所制得的特种钢硬度为219HBW。
实施例6
特种钢的成分为:含有碳0.02%,铬16%,镍6%,铜0.1%,镁0.45%,锰1.1%,铌0.5%,其余为铁。
其加工方法为:按照上述比例,进行原料配比,混合,下料。
锻造温度为1530~1580℃,热处理扩散退火温度1100~1150℃,6小时,固溶处理温度1050~1150℃,2小时。
正火温度为950℃~970℃。加工,然后渗碳,渗碳温度为920℃,时间为6h,以丙酮为渗碳剂。
预冷至870~880℃,然后进行油冷淬火,至室温。最后在200℃时回火3h。表面处理后得到产品。经试验检测,所制得的特种钢硬度为220HBW。
以上实施列对本发明不构成限定,相关工作人员在不偏离本发明技术思想的范围内,所进行的多样变化和修改,均落在本发明的保护范围内。
Claims (9)
1.一种低自噪声特种钢,其特征在于所述特种钢各成分质量百分比为:
2.根据权利要求1所述的低自噪声特种钢,其特征在于所述特种钢各成分质量百分比为:
3.根据权利要求1所述的低自噪声特种钢,其特征在于其成分中还含有铌0.3~0.8%。
4.如权利要求1~3所述的低自噪声特种钢的加工方法,其特征在于包括以下步骤:下料、锻造、正火、加工、渗碳、预冷淬火、低温回火、表面处理。
5.根据权利要求4所述的低自噪声特种钢的加工方法,其特征在于锻造时,其温度为1530~1580℃,热处理扩散退火温度1100~1150℃,4~6小时,固溶处理温度1050~1150℃,2小时。
6.根据权利要求4所述的低自噪声特种钢的加工方法,其特征在于正火温度为950℃~970℃。
7.根据权利要求4所述的低自噪声特种钢的加工方法,其特征在于所述的渗碳,渗碳温度为920℃,时间为6~8h,以丙酮为渗碳剂。
8.根据权利要求4所述的低自噪声特种钢的加工方法,其特征在于所述的预冷淬火为,预冷至870~880℃,然后进行油冷,冷却至室温。
9.根据权利要求4所述的低自噪声特种钢的加工方法,其特征在于所述的回火是在200℃时回火2~3h。
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