| HT250铸件表面孔洞缺陷分析 |
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| 引用本文： | 徐志辉,杜希刚,张守丰,麻硕. HT250铸件表面孔洞缺陷分析[J]. 失效分析与预防, 2011, 6(4): 229-231,260. DOI: 10.3969/j.issn.1673-6214.2011.04.007 |
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| 作者姓名： | 徐志辉 杜希刚 张守丰 麻硕 |
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| 作者单位： | 大连三洋压缩机有限公司,辽宁大连,116033 |
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| 摘 要： | 采取硬度检测、托伸试验、金相检验和化学成分分析等方法,对不同铸造工艺HT250铸件的表面孔洞缺陷进行调查与分析.结果表明:HT250铸件硬度明显低于国家标准要求,部分铸件的抗拉强度不满足国家标准要求,金相组织中铁素体含量较高(珠光体含量低于85％),石墨粗大、不均匀,化学成分不满足企业标准要求.孔洞缺陷是其加工表面在高...
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| 关 键 词： | 孔洞缺陷 HT250 铁素体 石墨形态 金相组织 |
Analysis on Surface Hole Defects of HT250 Casting |
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| XU Zhi-hui,DU Xi-gang,ZHANG Shou-feng,MA Shuo. Analysis on Surface Hole Defects of HT250 Casting[J]. Failure Analysis and Prevention, 2011, 6(4): 229-231,260. DOI: 10.3969/j.issn.1673-6214.2011.04.007 |
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| Authors: | XU Zhi-hui DU Xi-gang ZHANG Shou-feng MA Shuo |
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| Affiliation: | XU Zhihui,DU Xigang,ZHANG Shoufeng,MA Shuo(Dalian Sanyo Compressor Corporation of Limited,Liaoning Dalian 116033,China) |
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| Abstract: | The surface hole defects of HT250 casting were investigated and analyzed by hardness testing,tensile testing, metallographic inspection and chemical composition analysis.The results show that the hardness is obviously and the tensile strength is partially lower than the standard requirements,the ferrite content is relatively high and the graphite is non-uniform, the chemical composition doesn't meet the requirements.The hole defects are cutting pits which formed due to graphite shedding with surrounding fer... |
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| Keywords: | hole defects HT250 ferrite graphite morphology microstructure |
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