摘要
为研究1Cr12MoV钢锻件力学性能不合格的原因,采用化学成分分析、光学显微镜及扫描电镜等手段,对锻件的化学成分、显微组织及断口形貌展开分析。结果表明,基体组织中存在大尺寸、聚集分布的网状共晶碳化物,其等级达到了5级,不满足≤3级的要求,这也是导致力学性能不合格的主要原因。通过对模锻坯料进行自由锻拔长,增加模锻工序的变形量,并添加预备热处理工艺,改善了共晶碳化物形态和分布,力学性能满足了交付要求。
In order to study the cause of unqualified mechanical testing for 1Cr12MoV steel forgings,chemical composition analysis,optical microscopy and scanning electron microscopy were used to analyze the chemical composition,microstructure and fracture morphology of the forgings.The results show that large-sized and aggregated eutectic carbides are existed in the matrix which reaches level 5 and doesn't meet the requirement of below level 3,which is the main reason for the failure of mechanical performance testing.Through elongating the forging stock by free forging,increasing the deformation during the forging process,and adding a preliminary heat treatment process,the distribution of eutectic carbides is greatly improved,and mechanical properties meet the delivery requirements.
作者
李伟
刘京
邵洙浩
郝红军
唐林
姜涛
Li Wei;Liu Jing;Shao Zhuhao;Hao Hongjun;Tang Lin;Jiang Tao(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2023年第11期300-304,共5页
Heat Treatment of Metals
