冷却方式对1Cr13Ni马氏体不锈钢组织和性能的影响
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摘要
为了获得冷却方式对1Cr13Ni马氏体不锈钢显微组织和性能的影响,分别对经过钎焊热循环后的试样进行水冷、油冷、空冷和炉冷处理,研究钎焊热循环后不同冷却速度对1Cr13Ni马氏体不锈钢组织和性能的影响。结果表明:1Cr13Ni马氏体不锈钢水冷淬火组织主要是马氏体、铁素体以及残余奥氏体。冷却速度越快,马氏体晶粒越细小,数量越多;试样的强度与硬度均随着冷却速度的增大而增大,伸长率与断面收缩率随着冷却速度的增大而减小。当冷却速度较慢(炉冷)时,大量碳化物和部分铁素体沿奥氏体晶界析出,马氏体数量较少,材料的硬度、抗拉强度、伸长率均较低。水淬后抗拉强度最大,为1638 MPa。空冷后的伸长率最大,为22.48%。
In order to obtain the effects of cooling mode on the microstructure and properties of 1 Cr13 Ni martensitic stainless steel, the samples after brazing heat cycling were treated with water, oil, air and furnace cooling respectively. The effects of different cooling rates on the microstructure and properties of 1 Cr13 Ni martensitic stainless steel after brazing heat cycling were studied. The results show that, the water quenching microstructure of 1 Cr13 Ni martensite stainless steel is mainly martensite, ferrite and residual austenite. The faster the cooling rate is, the smaller the martensite grain is and the bigger the quantity is. The strength and hardness of the specimen increase with the increase of cooling rate, and the elongation and the shrinkage of section decrease with the increase of cooling rate. When the cooling rate of furnace cooling is slow, a large number of carbides and some ferrite precipitate along the austenite grain boundary, the amount of martensite is less, and the hardness, tensile strength and elongation of the corresponding materials are lower. The maximum tensile strength after water quenching is 1638 MPa. The maximum elongation after air cooling is 22.48%.
In order to obtain the effects of cooling mode on the microstructure and properties of 1 Cr13 Ni martensitic stainless steel, the samples after brazing heat cycling were treated with water, oil, air and furnace cooling respectively. The effects of different cooling rates on the microstructure and properties of 1 Cr13 Ni martensitic stainless steel after brazing heat cycling were studied. The results show that, the water quenching microstructure of 1 Cr13 Ni martensite stainless steel is mainly martensite, ferrite and residual austenite. The faster the cooling rate is, the smaller the martensite grain is and the bigger the quantity is. The strength and hardness of the specimen increase with the increase of cooling rate, and the elongation and the shrinkage of section decrease with the increase of cooling rate. When the cooling rate of furnace cooling is slow, a large number of carbides and some ferrite precipitate along the austenite grain boundary, the amount of martensite is less, and the hardness, tensile strength and elongation of the corresponding materials are lower. The maximum tensile strength after water quenching is 1638 MPa. The maximum elongation after air cooling is 22.48%.
引文
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[3]刘珊,张莉,丁志敏,等.热处理对1Cr13Ni马氏体不锈钢组织与性能影响[J].金属加工(热加工),2015,66(19):36-38.
[4] Mola J, Cooman B C D.Quenching and partitioning(Q&P)processing of martensitic stainless steels[J].Metallurgical&Materials Transactions A,2013,44(2):946-967.
[5] Chakraborty G, Das C R, Albert S K, et al.Study on tempering behavior of AISI 410 stainless steel[J].Materials Characterization,2015,100:81-87.
[6]刘海龙,党淑娥,刘建生.淬火温度对1Cr13马氏体不锈钢中铁素体含量的影响[J].金属热处理,2016,41(8):33-36.
[2] Eichelmann G H, Hull F C.The effect of composition on the temperature of spontaneous transformation of austenite to martensite in 18-8 type stainless steel[J].Transactions of the American Society for Metals,1952,45:77-104.
[3]刘珊,张莉,丁志敏,等.热处理对1Cr13Ni马氏体不锈钢组织与性能影响[J].金属加工(热加工),2015,66(19):36-38.
[4] Mola J, Cooman B C D.Quenching and partitioning(Q&P)processing of martensitic stainless steels[J].Metallurgical&Materials Transactions A,2013,44(2):946-967.
[5] Chakraborty G, Das C R, Albert S K, et al.Study on tempering behavior of AISI 410 stainless steel[J].Materials Characterization,2015,100:81-87.
[6]刘海龙,党淑娥,刘建生.淬火温度对1Cr13马氏体不锈钢中铁素体含量的影响[J].金属热处理,2016,41(8):33-36.