双相不锈钢铸件裂纹的形成原因及对策
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摘要
目前裂纹是影响双相不锈钢铸件质量最严重的缺陷之一。文中从双相不锈钢本身固有的成分和组织特性出发,分析双相不锈钢铸件产生裂纹的原因,表明双相不锈钢铸件裂纹主要由双相不锈钢的σ相脆性、475℃脆性和晶粒粗化脆性以及夹渣、气孔等铸造缺陷所引起的,并针对双相不锈钢铸件实际生产的各个工序提出了相应的裂纹预防措施。
Cracks have become one of the most serious defects for duplex stainless steel(DSS) casting at present. In this paper,based on the inherent composition and microstructure characteristics of DSS,the causes of cracks in DSS castings were analyzed,the cracks in DSS castings are caused by σ phase brittleness,475℃brittleness, grain coarsening brittleness, and casting defects such as slag inclusion and gas pore. The corresponding prevention methods for cracks also had been put forward during DSS casting production process.
Cracks have become one of the most serious defects for duplex stainless steel(DSS) casting at present. In this paper,based on the inherent composition and microstructure characteristics of DSS,the causes of cracks in DSS castings were analyzed,the cracks in DSS castings are caused by σ phase brittleness,475℃brittleness, grain coarsening brittleness, and casting defects such as slag inclusion and gas pore. The corresponding prevention methods for cracks also had been put forward during DSS casting production process.
引文
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[2]周红,闵正清,欧家才,等.百万千瓦级核电站海水循环泵双相不锈钢叶轮的研制[J].铸造,2011,60(12):1171-1174.
[3]沈高峰,吴新村.超级双相不锈钢SAF2507裂纹缺陷[J].特种铸造及有色合金,2012,32(11):1051-1053.
[4]邓学林.超级双相不锈钢叶轮的研制[J].铸造技术,2014,35(4):752-754.
[5]Rodrigo Magnabosco1,Daniella Calusciodos Santos.Intermetallic phases formation during short aging between 850℃and 950℃of a super duplex stainless steel[J].Journal of Materials Research and Technology,2012,2(1):71-74.
[6]吴玖.双相不锈钢[M].北京:冶金工业出版社,1999:32.
[7]王月香,方轶琉,刘振宇,等.2205双相不锈钢急冷后金相组织中微裂纹产生机理的研究[J].钢铁研究,2009,37(6):25-29.
[8]Michael Pohl,Oliver Storz,Thomas Glogowski.Effect of intermetallic precipitations on the properties ofduplex stainless steel[J].Materials Characterization,2007(58):65-71.
[9]Lo K H,Shek C H,Lai J K L.Recent developments in stainless steels[J].Materials Science and Engineering R,2009(65):39-104.
[10]詹传刚.CE3MN双相不锈钢铸件裂纹缺陷的消除[J].铸造,2004,53(2):153-154.
[11]李鉴光,陈继志,李镜银.5A超级双相不锈钢导流壳铸件冷裂分析及解决对策[J].铸造技术,2014,35(4):832-833.
[12]潘建伟,孙力,谢飞.铸造双相不锈钢叶轮开裂分析与改进措施[J].金属铸锻焊技术,2011,40(23):222-223.
[13]张东红,于汇峰,王喜玉.A890-5A超级双相不锈钢核泵铸件裂纹缺陷的消除[J].热加工工艺,2014,43(1):90-91.
[14]陈爽,廖兴银,郭江,等.超级双相不锈钢海水循环泵铸造工艺[J].铸造,2013,62(11):1134-1136.
[15]欧阳春.CD-4MCu双相不锈钢泵体铸件裂纹分析与防止措施[C].2014重庆市铸造年会论文集,2014:122-124.
[16]李奠基.双相不锈钢铸件气体敏感性机理新说[J].铸造技术,2010,31(8):965-967.
[17]沈高峰,黄高杨,沈捷美.SAF2507双相不锈钢阀体的气孔分析[J].特种铸造及有色合金,2013,33(8):785-786.