论文部分内容阅读
一、前言根据技术任务书要求≤φ10毫米的GCr15钢滚子淬火以后无氧化少脱碳(脱碳层原米的0.08毫米减少到0.04毫米),以便进一步减少留磨量,节约贵重的轴承钢和提高滚子的质量,达到无氧化无脱碳的先进水平。为此,必预采用真空热处理和可控气氛热处理来解决。但真空热处理设备昂贵,需要雄厚的资金。而可控气氛热处理,只需选择适当的可控气氛,改造下原有设备,就可以达到可控气氛热处理的目的。为解决轴承滚子淬火时的氧化脱碳问题,根据GCr15钢达到无氧化脱碳时,控制气氛中不能含有CO、CO_2
I. Preface According to technical requirements, the GCr15 steel roller with the requirement of ≤φ10 mm is not oxidized and less decarburized after quenching (the 0.08 mm of decarburized layer is reduced to 0.04 mm) so as to further reduce the amount of residual grinding and save valuable bearing steel And to improve the quality of the roller, no decarbonization to achieve the advanced level. To this end, will be pre-vacuum heat treatment and controlled atmosphere heat treatment to solve. However, vacuum heat treatment equipment is expensive and requires substantial funding. The controllable atmosphere heat treatment, just select the appropriate controllable atmosphere, under the transformation of the original equipment, you can achieve the purpose of controlled atmosphere heat treatment. In order to solve the problem of oxidative decarburization during bearing roller quenching, according to GCr15 steel to achieve non-oxidative decarburization, the control atmosphere can not contain CO, CO_2