1Cr11Ni2W2MoV不銹鋼軸承蓋表面線(xiàn)性缺陷分析

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摘要：對(duì)多個(gè)1Cr11Ni2W2MoV不銹鋼軸承蓋出現(xiàn)的線(xiàn)性缺陷進(jìn)行研究，從宏觀(guān)和微觀(guān)角度對(duì)缺陷進(jìn)行檢測(cè)分析，結(jié)果表明：軸承蓋零件出現(xiàn)的線(xiàn)性缺陷為鍛造折疊缺陷，形成原因主要與多火次成形過(guò)程中毛坯毛刺被擠入以及捶打位置偏離有關(guān)。在此基礎(chǔ)上，對(duì)鍛造折疊的形成機(jī)理、危害和預(yù)防措施進(jìn)行相關(guān)闡述。

關(guān)鍵詞：1Cr11Ni2W2MoV不銹鋼；線(xiàn)性缺陷；鍛造折疊；金相檢查

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%的低碳鋼中加入大量的W、Mo、V等，來(lái)縮小奧氏體相區(qū)的鐵素體形成元素而得到的一種新型馬氏體耐熱不銹鋼，其室溫抗拉強(qiáng)度、持久強(qiáng)度極限及蠕變極限均較高，且具有良好的塑性和抗氧化性能。（剩余1988字）