理化检验-物理分册2013，Vol.49Issue(8)：549-551,555,4.
20CrMnTi齿轮钢铸坯缺陷引起的开裂分析
Cracking Analysis of 20CrMnTi Gear Steel Caused by Casting Defects
万长杰 1白瑞娟 1张胜利 1申丽娟 1刘小桥1
作者信息
摘要
Abstract
Cracks were often found in 20CrMnTi gear steel during processing.The cracking characteristics of 20CrMnTi gear steel caused by casting defects were analyzed by means of macro and micro examination.The results indicate that the cracks caused by subsurface bubble on the casting surface were smooth,the crack tail was obtuse,and severe oxidation decarburization phenomenon occurred at both sides of the cracks.At the cracking area caused by surface slag,crackle inclusions and carburet coexisted and grain at the cracking area had obvious directivity.More inclusions in the casting blank would result in tiny surface cracks defect on surface of the material during processing.关键词
20CrMnTi齿轮钢/铸坯缺陷/开裂/皮下气泡/表面夹渣/夹杂物Key words
20CrMnTi gear steel/ casting defects/ cracking/ subsurface bubble/ surface slag/ inclusion分类
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万长杰,白瑞娟,张胜利,申丽娟,刘小桥..20CrMnTi齿轮钢铸坯缺陷引起的开裂分析[J].理化检验-物理分册,2013,49(8):549-551,555,4.
