HT250灰铸铁轮环开裂原因分析  

Analysis on Cause for Cracking of HT250 Gray Cast Iron Wheel Ring

作　　者：金帅 王会强[1] 冯阔 邓皓楠 崔建英[2] 赵建新 魏达 郭天伟 孙玉林 孙广军 顾萌 JIN Shuai;WANG Huiqiang;FENG Kuo;DENG Haonan;CUI Jianying;ZHAO Jianxin;WEI Da;GUO Tianwei;SUN Yulin;SUN Guangjun;GU Meng(College of Mechanical and Electrical Engineering,Hebei Agricultural University,Baoding 071000,Hebei China;Juli Sling Co.,Ltd.,Baoding 071000,Hebei China;Baoding DONGLI Machinery Co.,Ltd.,Baoding 071000,Hebei China;Chengde Lvnong Machinery Equipment Manufacturing Co.,Ltd.,Chengde 067000,Hebei China;Chengde Wanlian Machinery manufacturing Co.,Ltd.,Chengde 067000,Hebei China;Hebei field water￣saving irrigation equipment Co.,Ltd.,Handan 056000,Hebei China;Tangshan Lijun Machinery Manufacturing Co.,Ltd.,Tangshan 063000,Hebei China;Baoding Xingrun axle manufacturing Co.,Ltd.,Baoding 071000,Hebei China)

机构地区：[1]河北农业大学机电工程学院,河北保定071000 [2]巨力索具股份有限公司,河北保定071000 [3]保定市东利机械制造股份有限公司,河北保定071000 [4]承德绿农机械设备制造有限公司,河北承德067000 [5]承德万联机械制造有限公司,河北承德067000 [6]河北田野节水灌溉设备有限公司,河北邯郸056000 [7]唐山利军机械制造有限公司,河北唐山063000 [8]保定市兴润车桥制造有限公司,河北保定071000

出　　处：《热处理》2024年第3期47-51,共5页Heat Treatment

基　　金：河北省重点研发计划项目(20312201D);河北省重大成果转化项目(21287001Z)。

摘　　要：HT250灰铸铁轮环使用中开裂.为此对该开裂轮环进行了宏观检验、化学成分分析、硬度检测、断口分析和金相检验,并采用ANSYS软件进行了仿真分析.结果表明:HT250轮环的硅含量偏高、锰含量偏低,从而形成了较多片状石墨,导致轮环脆性增大;轮环中含有夹杂物,降低了HT250轮环的均匀性和连续性,造成局部应力集中,是轮环开裂的原因之一;HT250轮环有气孔等铸造缺陷,降低了轮环件的机械强度;轮环开裂起始于厚壁一侧的内缘.wheel ring of HT250 gray cast iron cracked in service.For this reason,macro-examination,chemical composition analysis,hardness detection,fracture test and metallographic examination were carried out on the cracked wheel ring,as well as the simulation analysis was carried out by ANSYS software.The results showed that(a)chemical composition of the wheel ring did not meet the requirements,that is,the silicon content was higher and the manganese content was lower,which caused the more flaky graphite to form,thus resulting in the wheel ring increasing in brittleness;(b)the wheel ring contained inclusions which reduced its uniformity and continuity,and caused local stress concentration in it,which proved to be one of the causes for the wheel ring cracking;(c)the wheel ring exhibited casting defect such as gas pores,which reduces the mechanical strength of the wheel ring;and(d)cracking of the wheel ring originated from its inner edge of thick wall side.

关 键 词：灰铸铁 轮环开裂 ANSYS 软件 

分 类 号：TG115[金属学及工艺—物理冶金]