30CrMnSi钢筒形件旋压开裂的原因及改进措施  

Reasons of Cracking of 30CrMnSi Steel Cylindrical Part during Spinning and Improvement Measures

作　　者：肖乾发 梁霄鹏[2] 姚春臣 许晓波 罗青云 丁洵 李耀 XIAO Qianfa;LIANG Xiaopeng;YAO Chunchen;XU Xiaobo;LUO Qingyun;DING Xun;LI Yao(Jiangnan Industries Group Co.,Ltd.,Xiangtan 411207,China;School of Materials Science and Engineering,Central South University,Changsha 410083,China)

机构地区：[1]江南工业集团有限公司,湘潭411207 [2]中南大学材料科学与工程学院,长沙410083

出　　处：《理化检验（物理分册）》2021年第11期75-78,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：一种30CrMnSi钢大型筒形件在旋压过程中发生开裂,通过宏观观察、化学成分分析、断口分析、显微组织观察、扫描电镜和能谱分析等方法,并结合对生产过程的排查,分析了筒形件开裂的原因。结果表明:筒形件旋压前热处理工艺不当,导致硬度、组织均不均匀,这是筒形件发生旋压开裂的主要原因;通过改进热处理工艺,选用适用于大型工件的双向交替冷却方式,并对旋压工艺进行改进、完善,此后的旋压件均未发生开裂,产品性能满足技术要求。A large cylindrical part of 30 CrMnSi steel cracked during spinning process.Through macroscopic observation,chemical composition analysis,fracture analysis,microstructure observation,scanning electron microscope and energy spectrum analysis,and conbined with inspection of production process.The reasons for cracking of cylindrical part were analyzed.The results showed that improper heat treatment process of cylindrical part before spinning led to uneven hardness and structure.This was the main reason for spinning cracking of cylindrical part.By improving heat treatment process,the two-way alternating cooling method suitable for large workpieces was selected.In addition,the spinning process was improved and perfected.After that,no cracks occurred in spinning products,and product performance met technical requirements.

关 键 词：30CRMNSI钢 筒形件 旋压 断口分析 

分 类 号：TG142[一般工业技术—材料科学与工程]