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温度对耐热不锈钢310S氧化膜断面及基体的影响

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2014年第4期 黄晖,等:60Si2Mn弹簧扁钢剪切端部裂纹分析 ・ 57 ・ 余元素,有效减缓连铸坯的中心偏析。 析带扩展产生。 2)剪切温度与裂纹产生有直接关系,当温度处 4.2炼钢方面 0—200℃左右时,材料综合力学性能较差,剪 合理控制连铸拉速、过热度,适当降低过热度和 于10拉速可减轻钢中心偏析[ 。 切时易出现裂纹。控制剪切温度在250 c【=以上,可以 有效控制扁钢端面裂纹的产生。 4.3轧钢方面 3)通过控制炼钢工序过热度、拉速,可减轻中心 在轧制后剪切工序,避开60Si2Mn弹簧钢力学 从而大大减轻裂纹的产生。 性能指标下降的温度区间,提高剪切温度到250℃ 偏析,以上。 参考文献 5结论 [1]易敏,陈明跃,崔京玉,等.圆钢剪切端面裂纹研究[J].首钢科 技,2007(4):30—33. 1)扁钢端面裂纹产生的原因是剪切残余应力作 用于钢中心偏析较严重部位而形成裂纹源,并沿偏 [2 3李论_浅析连铸坯的中心偏析[J].连铸,2009(2):38_43. (编辑:胡玉香) Crack Analysis of the Cut Ends Crack of 60Si2Mn Spring Flat Steel Huang Hlli.Zhang Wei (Technology Center of Fangda Special Steel Technology Co.Ltd.,Nanchang Jian ̄330012) Abstract:As to the crack problem of sheared edge appeared in 60Si2Mn spring fiat steel products of Fangda Special Steel companies,this paper performs crack detection,shear temperature test and mechanical properties detection under diferent temperatures.It is found that the shear temperature has an effect Oil the cracks.And the reason why shear cracks appear is the shear stress acts on the serious parts of crack source and the transverse cracks is formed in process of residual stress expansion.Based on the above analysis,appropriate measures are taken from steelmaking, rolling process,which effectively control the shear cracks of the spring flat stee1. Key words:spring flat steel,crack,shear temperature,cause analysis (上接第12页) 参考文献 [3]朱日彰,何业东,齐慧滨.高温腐蚀及耐高温腐蚀材料[M].上 海:上海科学技术出版社,1993. [1]李美栓.金属的高温腐蚀[M].北京:冶金工业出版社,2001. [2]杨照明,韩静涛,刘靖,等.奥氏体耐热不锈钢310S的抗高温氧 化性能研究[J].热加工工艺,2006,35(14):33—34;57. (编辑:胡玉香) Effect of Temperature on the Matrix and Scale Side Section of Austenitic Stainless Steel 310S Yang Jianpeng (Shanxi Taigang Stainless Steel Co.,Ltd.,Taiyuan Shanxi 030003) Abstract:Based on the austenitic stainless steel 310S,the matrix and side section of the oxidation scale formed at 800℃.1 000℃.1 200℃for 140 h are analyzed by EDS techniques.The results indieate that the SCale thickness increases with the temperature rising.The SCale consists of Mn,Cr and Si oxidation.Mn,Cr oxidation are outside of the scale and Si is inside.Moreover,Si is oxide severely inside of he scalte with the temperature rising to 1 200℃.which weakens the oxidation resistance of 3 10S. Key words:austenitic stainless steel,oxidation SCale,oxidation resistance,side section 

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