电缆断线钳齿板断齿原因分析  

Broken Reason Analysis on Toothed Plate of Cable Cutters

作　　者：白宝忠[1] 钱建国[1] 燕样样[1] 姚永红[1] 邹恩新[2] 

机构地区：[1]陕西工业职业技术学院,咸阳712000 [2]汉川机床集团公司热表公司,汉中723003

出　　处：《理化检验（物理分册）》2011年第8期518-521,共4页Physical Testing and Chemical Analysis(Part A:Physical Testing)

摘　　要：采用宏观分析、金相检验、硬度测试、化学成分分析、扫描电镜观察及X射线衍射分析等检测手段,对某批电缆断线钳齿板出现批量断齿的原因进行了分析。结果表明:齿板断齿主要是高温回火脆性和精铸时形成的大量缩松缺陷引起的,而成分偏析引起的非金属夹杂物、磷共晶及Fe-Cr-Mn化合物等各种脆性化合物促进了齿板断齿的发生。最后提出了改进措施。Batch fracture reasons of a batch of toothed plate of cable cutters were analyzed by macro examination,metallographic examination,hardness testing,chemical compositions analysis,SEM observation and XRD analysis.The results show that high temper brittleness and heavy shrinkage porosity in fine casting were the main reasons for the fracture,and non-metallic inclusions,phosphorus eutectic structure and Fe-Cr-Mn compound caused by elements segregation accelerated the fracture.At last,the perfection measures were put forward.

关 键 词：齿板断齿 高温回火脆性 精铸 缩松 

分 类 号：TG93[金属学及工艺—钳工工艺]