20Mn2钢链条断裂原因分析  

Cause for 20Mn2 Steel Chain Breaking

作　　者：王少聪 王会强[1] 崔建英[2] 赵建新 闫学兰 孙玉林 孙广军 王晓丽 WANG Shaocong;WANG Huiqiang;CUI Jianying;ZHAO Jianxin;YAN Xuelan;SUN Yulin;SUN Guangjun;WANG Xiaoli(College of Mechanical and Electrical Engineering,Hebei Agricultural University,Baoding 071001,Hebei China;Juli Sling Co.,Ltd.,Baoding 072550,Hebei China;Baoding Dongli Machinery Manufacturing Co.,Ltd.,Baoding 071100,Hebei China;Baoding Jinyang guang Energy Equipment Technology Co.,Ltd.,Baoding 071051,Hebei China;Hebei Tianye Water Saving Irrigation Equipment Co.,Ltd.,Baoding 071100,Hebei China;Tangshan Lijun Machinery Manufacturing Co.,Ltd.,Baoding 071100,Hebei China;Hebei Runnong Water Saving Technology Co.,Ltd.,Baoding 071100,Hebei China)

机构地区：[1]河北农业大学机电工程学院,河北保定071001 [2]巨力索具股份有限公司,河北保定072550 [3]保定市东利机械制造股份有限公司,河北保定071100 [4]保定金阳光能源装备科技有限公司,河北保定071051 [5]河北田野节水灌溉设备有限公司,河北保定071100 [6]唐山利军机械制造有限公司,河北保定071100 [7]河北润农节水科技股份有限公司,河北保定071100

出　　处：《热处理》2024年第4期49-51,54,共4页Heat Treatment

摘　　要：某厂20Mn2钢链条在使用中断裂。为找出链条断裂的原因,检测了断裂链条的化学成分、硬度、显微组织和断口形貌。结果表明:链条表面脱碳严重,导致表面疲劳强度和硬度下降;心部有大量铁素体和氧化物夹杂,导致其力学性能降低。是这两个因素导致链条在使用中断裂。The 20Mn2 steel chain broke in service in a factory.In order to find out the cause of the its breaking,the broken chain was tested for chemical composition,hardness,microstructure and fracture pattern.The results showed that the chain exhibited seriously decarburized case and thereby decreased in fatigue strength and hardness,and that the chain had a large amount of ferrite and oxide inclusions,and thereby decreased in mechanical properties.The chain breaking in service was attributed to these two factors.

关 键 词：20MN2钢 热处理 断裂 脱碳 

分 类 号：TG115[金属学及工艺—物理冶金]