| 20MnCr5钢齿轮轴渗碳淬火后表面缺陷原因分析 |
| |
| 引用本文： | 杨娥,周杨,杨智,李波.20MnCr5钢齿轮轴渗碳淬火后表面缺陷原因分析[J].理化检验(物理分册),2019,55(5):341-343. |
| |
| 作者姓名： | 杨娥 周杨 杨智 李波 |
| |
| 作者单位： | 大冶特殊钢股份有限公司 高品质特殊钢湖北省重点实验室,黄石,435001;大冶特殊钢股份有限公司 高品质特殊钢湖北省重点实验室,黄石,435001;大冶特殊钢股份有限公司 高品质特殊钢湖北省重点实验室,黄石,435001;大冶特殊钢股份有限公司 高品质特殊钢湖北省重点实验室,黄石,435001 |
| |
| 摘 要： | 某公司生产的20MnCr5钢齿轮轴经渗碳淬火处理,精加工后发现齿轮轴表面局部可见明显斑疤。采用宏观观察、化学成分分析、扫描电镜分析和金相检验等方法对齿轮轴表面缺陷的产生原因进行了分析。结果表明:渗碳热处理前使用的防渗碳涂料中的金属铜渗入钢材的晶界,使钢材发生脆化开裂,继而防渗碳涂料中其他低熔点物质也渗入钢材的晶界,破坏钢材基体的连续性,因此精加工后齿轮轴表面出现斑疤状的缺陷。
|
| 关 键 词： | 齿轮轴 渗碳淬火 斑疤 防渗碳涂料 脆化开裂 |
Cause Analysis on Surface Defects of 20MnCr5 Steel Gear Shafts after Carburizing and Quenching |
| |
| YANG E,ZHOU Yang,YANG Zhi,LI Bo.Cause Analysis on Surface Defects of 20MnCr5 Steel Gear Shafts after Carburizing and Quenching[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2019,55(5):341-343. |
| |
| Authors: | YANG E ZHOU Yang YANG Zhi LI Bo |
| |
| Affiliation: | (Hubei Key Laboratory of High Quality Special Steel, Daye Special Steel Co., Ltd., Huangshi 435001, China) |
| |
| Abstract: | The 20MnCr5 steel gear shafts was treated with carburizing and quenching.After fine machining,obvious spotted scars were found on the surface of the gear shafts.The causes of surface defects of the gear shafts were analyzed by means of macro observation,chemical composition analysis,scanning electron microscopy analysis,metallographic examination and so on.The results show that the copper in the anti carburizing coating used before carburizing heat treatment penetrated into the grain boundaries of steel and caused embrittlement cracking of steel material.Then other low melting point substances in the anti carburizing coating penetrated into the grain boundaries of steel and destroyed the continuity of the steel matrix.Therefore,the surface of gear shaft appeared spotted scar defects after fine machining. |
| |
| Keywords: | gear shaft carburizing and quenching spotted scar anti carburizing coating embrittlement cracking |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
