W6Mo5Cr4V2齿轮刀具断裂原因分析
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摘要
W6Mo5Cr4V2钢制齿轮刀具在使用中发生断裂,对断裂的齿轮刀具进行化学成分分析、硬度检测、断口分析、非金属夹杂物检验以及金相组织检验.检测结果表明:刀具的材质正常,断裂类型是脆性断裂,断裂原因是刀具金相组织中碳化物分布异常,呈网状分布,使刀具的力学性能中的强度、冲击韧性降低而脆性增大,导致刀具使用中在工作应力作用下发生脆性断裂.
The W6Mo5Cr4V2 steel gear cutter is prone to fracture in use.In an experiment reported in this paper,chemical composition analysis,hardness test,fracture analysis,non-metallic inclusion test and metallographic examination of the fractured gear cutter were carried out.The results showed that the material of the cutter was normal,and its fracture type was brittle fracture.The abnormal network-like distribution of carbides in the metallographic structure of the cutter,which reduced the strength and impact toughness and increased the brittleness of the mechanical properties,led to the brittle fracture of the gear cutter under the working stress.
The W6Mo5Cr4V2 steel gear cutter is prone to fracture in use.In an experiment reported in this paper,chemical composition analysis,hardness test,fracture analysis,non-metallic inclusion test and metallographic examination of the fractured gear cutter were carried out.The results showed that the material of the cutter was normal,and its fracture type was brittle fracture.The abnormal network-like distribution of carbides in the metallographic structure of the cutter,which reduced the strength and impact toughness and increased the brittleness of the mechanical properties,led to the brittle fracture of the gear cutter under the working stress.
引文
[1]孙元辉,孙易安.热处理工艺对高速钢组织性能的影响[J].热加工工艺,2011,40(18):156-159.
[2]赵先锐,冯尚申,李勤涛,等.高速钢刀具常见材料失效典型案例分析[J].热加工工艺,2013,42(18):189-191.
[3]上海市机械制造工艺研究所.金相分析技术[M].上海:上海科学技术文献出版社,1987:386-397.
[4]迟宏宵,马党参,占礼春,等.热处理对高速钢W6Mo5Cr4V3Co8组织和性能的影响[J].材料热处理学报,2012,33(12):105-109.
[5]王启明,成国光,黄宇.M2高速钢大尺寸碳化物的形貌特征及析出机理[J].钢铁,2018,53(1):65-71.
[6]戚正风,任瑞铭.国内外刀具材料发展现状[J].金属热处理,2008,33(1):15-20.
[7]厉鑫洋,车洪艳,林同伟,等.热处理对粉末冶金高速钢组织与性能的影响[J].金属热处理,2016,41(6):147-150.
[8]王丽仙,葛昌纯,郭双全,等.粉末冶金高速钢的发展[J].材料导报,2010,24(S5):459-462.
[2]赵先锐,冯尚申,李勤涛,等.高速钢刀具常见材料失效典型案例分析[J].热加工工艺,2013,42(18):189-191.
[3]上海市机械制造工艺研究所.金相分析技术[M].上海:上海科学技术文献出版社,1987:386-397.
[4]迟宏宵,马党参,占礼春,等.热处理对高速钢W6Mo5Cr4V3Co8组织和性能的影响[J].材料热处理学报,2012,33(12):105-109.
[5]王启明,成国光,黄宇.M2高速钢大尺寸碳化物的形貌特征及析出机理[J].钢铁,2018,53(1):65-71.
[6]戚正风,任瑞铭.国内外刀具材料发展现状[J].金属热处理,2008,33(1):15-20.
[7]厉鑫洋,车洪艳,林同伟,等.热处理对粉末冶金高速钢组织与性能的影响[J].金属热处理,2016,41(6):147-150.
[8]王丽仙,葛昌纯,郭双全,等.粉末冶金高速钢的发展[J].材料导报,2010,24(S5):459-462.