1Cr11Ni2W2MoV不锈钢轴承盖表面线性缺陷分析

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摘要：对多个1Cr11Ni2W2MoV不锈钢轴承盖出现的线性缺陷进行研究，从宏观和微观角度对缺陷进行检测分析，结果表明：轴承盖零件出现的线性缺陷为锻造折叠缺陷，形成原因主要与多火次成形过程中毛坯毛刺被挤入以及捶打位置偏离有关。在此基础上，对锻造折叠的形成机理、危害和预防措施进行相关阐述。

关键词：1Cr11Ni2W2MoV不锈钢；线性缺陷；锻造折叠；金相检查

Analysis of liner defects on the surface of 1Cr11Ni2W2MoV stainless steel bearing cap

ZHAO Xiangli，XIONG Yong，LIU Jian，TAN Jiaxu，ZHANG Fengtai，ZHANG Jichun

AECC Guizhou Liyang Aviation Power Co.， Ltd.， Guiyang 550014， Guizhou， China

Abstract： The linear defects of a number of 1Cr11Ni2W2MoV stainless steel bearing caps were studied， and the defects were detected and analyzed from the macroscopic and microscopic points of view. The results showed that the linear defects of the bearing caps were forging folding defects， and the formation reasons were mainly related to the extrusion of blank burrs and the deviation of the beating position during the multi-fire forming process. On this basis， the forming mechanism， harm and preventive measures of forging folding are expounded.

Keywords： 1Cr11Ni2W2MoV stainless steel; linear defect; forging folding; metallographic examination

1 序言

1Cr11Ni2W2MoV是在wCr＝12%的低碳钢中加入大量的W、Mo、V等，来缩小奥氏体相区的铁素体形成元素而得到的一种新型马氏体耐热不锈钢，其室温抗拉强度、持久强度极限及蠕变极限均较高，且具有良好的塑性和抗氧化性能。（剩余1988字）