风电齿轮轴渗碳淬火纵向裂纹分析
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摘要
对风电齿轮轴渗碳、淬火、回火处理后的纵向裂纹进行了宏观及微观的断口分析,对裂纹源区及其附近区域进行了金相组织、渗碳层深度、硬度、化学成分、拉伸及冲击性能等测试。结果表明:在轴身表层下的拉应力区存在异常大尺寸氧化铝夹渣缺陷,该部位在残余应力的作用下发生沿晶脆性开裂,具有氢致延迟开裂的典型特征,裂纹发生扩展形成宏观裂纹。
The macro and micro fracture morphology of longitudinal crack in gear shaft of wind power after carburizing,quenching and tempering were analyzed. And the microstructure,case hardening depth,hardness,chemical composition,tensile and impact properties in the crack source and its surrounding zone were also tested. The results show that there is the abnormal large aluminum oxide inclusion in the tensile stressed zone under the surface layer of shaft,where brittle intergranular cracking occurs at residual stress with the classical characterization of hydrogen induced delayed cracking,and the crack extends into the macro crack.
The macro and micro fracture morphology of longitudinal crack in gear shaft of wind power after carburizing,quenching and tempering were analyzed. And the microstructure,case hardening depth,hardness,chemical composition,tensile and impact properties in the crack source and its surrounding zone were also tested. The results show that there is the abnormal large aluminum oxide inclusion in the tensile stressed zone under the surface layer of shaft,where brittle intergranular cracking occurs at residual stress with the classical characterization of hydrogen induced delayed cracking,and the crack extends into the macro crack.
引文
[1]吉晓刚.风电齿轮箱制造及质量控制技术要点[J].工业,2015(6):46-46.
[2]王宁,胡伟叶.齿轮磨削裂纹失效分析[J].热处理技术与装备,2010,31(4):60-62.
[3]彭瑜华,张敏.滚轮磨削裂纹的产生机理及改进措施[J].金属热处理,2014,39(4):145-147.
[4]黄建斌.18Cr Ni Mo7-6锥齿轮轴纵裂原因分析[J].金属热处理,2015,40(9):219-221.
[5]杨春,朱衍勇,钟振前,等.齿轮轴纵向延迟开裂原因分析[J].金属热处理,2013,38(8):131-134.
[6]郭文华,林子洋.齿轮轴热处理裂纹产生原因分析[C].2009年全国失效分析学术会议论文集.
[7]刘玉芬,程丽杰,冯桂萍,等.18Cr Ni Mo7-6齿轮轴纵裂分析[J].物理测试,2012,30(6):46-49.
[8]Cerberich W W,Chen Y T.Hydrogen-controlled cracking-an approach to threshold stress intensity[J].Metallurgical Transactions A,1975,6(2):271-278.
[9]武光宗,王毛球,王春芳,等.回火马氏体钢中氢的扩散行为及其氢脆敏感性[J].材料热处理学报,2012,33(1):136-140.
[10]刘宗昌.钢件的淬火开裂及防治办法[M].北京:冶金工业出版社,2008.
[2]王宁,胡伟叶.齿轮磨削裂纹失效分析[J].热处理技术与装备,2010,31(4):60-62.
[3]彭瑜华,张敏.滚轮磨削裂纹的产生机理及改进措施[J].金属热处理,2014,39(4):145-147.
[4]黄建斌.18Cr Ni Mo7-6锥齿轮轴纵裂原因分析[J].金属热处理,2015,40(9):219-221.
[5]杨春,朱衍勇,钟振前,等.齿轮轴纵向延迟开裂原因分析[J].金属热处理,2013,38(8):131-134.
[6]郭文华,林子洋.齿轮轴热处理裂纹产生原因分析[C].2009年全国失效分析学术会议论文集.
[7]刘玉芬,程丽杰,冯桂萍,等.18Cr Ni Mo7-6齿轮轴纵裂分析[J].物理测试,2012,30(6):46-49.
[8]Cerberich W W,Chen Y T.Hydrogen-controlled cracking-an approach to threshold stress intensity[J].Metallurgical Transactions A,1975,6(2):271-278.
[9]武光宗,王毛球,王春芳,等.回火马氏体钢中氢的扩散行为及其氢脆敏感性[J].材料热处理学报,2012,33(1):136-140.
[10]刘宗昌.钢件的淬火开裂及防治办法[M].北京:冶金工业出版社,2008.