冷轧变形率对超纯铁素体不锈钢439板材退火组织与性能的影响
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摘要
将超纯铁素体不锈钢439板材在不同冷轧变形率下冷轧变形,然后将轧制态冷板在950~1050℃下进行退火,研究冷轧变形率对该材料退火组织及性能的影响。结果表明:随着变形率的增加,晶粒尺寸变小;50%变形率条件下冷板最高伸长率为36%,80%变形率条件下最高伸长率可达40%;基于金相试验数据,利用回归分析的方法计算了不同变形率条件下的晶粒长大激活能,得出50%和80%冷轧变形率条件下再结晶晶粒长大激活能分别为60.19 kJ/mol和65.68 kJ/mol;采用晶粒尺寸与晶界迁移激活能间的定量关系来描述晶粒长大过程,最终建立了该合金在试验温度范围内再结晶晶粒长大的动力学模型。
The ultra-pure ferrite stainless steel 439 sheet was cold rolled with different cold rolling deformation rates,and then the rolled cold sheet was annealed at 950-1050 ℃,and the effect of cold rolling deformation rate on annealing microstructure and properties of the steel was studied. The results show that the grain size of the steel decreases with the increase of deformation rate. The maximum values of elongation of the steel with deformation rate of 50% and 80% are 36% and 40%,respectively. Based on metallographic test data,the activation energy of recrystallization grain growth of the steel at different deformation rates is calculated by regression analysis,and the activation energy of recrystallization grain growth of the steel with cold rolling deformation rate of 50% and 80% is 60. 19 k J/mol and65. 68 k J/mol,respectively. The quantitative relationship between grain size and grain boundary migration activation energy is used to describe the grain growth process. Finally,a kinetic model for recrystallization grain growth of the steel at test temperature is established.
The ultra-pure ferrite stainless steel 439 sheet was cold rolled with different cold rolling deformation rates,and then the rolled cold sheet was annealed at 950-1050 ℃,and the effect of cold rolling deformation rate on annealing microstructure and properties of the steel was studied. The results show that the grain size of the steel decreases with the increase of deformation rate. The maximum values of elongation of the steel with deformation rate of 50% and 80% are 36% and 40%,respectively. Based on metallographic test data,the activation energy of recrystallization grain growth of the steel at different deformation rates is calculated by regression analysis,and the activation energy of recrystallization grain growth of the steel with cold rolling deformation rate of 50% and 80% is 60. 19 k J/mol and65. 68 k J/mol,respectively. The quantitative relationship between grain size and grain boundary migration activation energy is used to describe the grain growth process. Finally,a kinetic model for recrystallization grain growth of the steel at test temperature is established.
引文
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[2]Fu J,Qiu W,Nie Q,et al.Precipitation of Ti N during solidification of AISI 439 stainless steel[J].Journal of Alloys and Compounds,2017,699.
[3]覃怀鹏,陈海涛,郎宇平,等.非金属夹杂物对439M铁素体不锈钢耐点蚀性能的影响[J].热加工工艺,2016,45(6):89-92.QIN Huai-peng,CHEN Hai-tao,LANG Yu-ping,et al.Hot compression deformation behavior of AZ31 magnesium alloy at elevated temperature[J].Hot Working Technology,2016,45(6):89-92.
[4]Soares S,Anne-Marie H,Da L,et al.Comparative study of high temperature oxidation behaviour in AISI 304 and AISI 439 stainless steels[J].Materials Research,2003,6(2):179-185.
[5]Huntz,A,Reckmann A,Haut C,et al.Oxidation of AISI 304 and AISI 439 stainless steels[J].Materials Science and Engineering A,2007,447(1/2):266-276.
[6]Ali-L9ytty H,Jussila P,Juuti T,et al.Influence of precipitation on initial high-temperature oxidation of Ti-Nb stabilized ferritic stainless steel SOFC interconnect alloy[J].International Journal of Hydrogen Energy,2012,37(19):14528-14535.
[7]刘海涛,马东旭,刘振宇,等.终轧温度对超纯铁素体不锈钢组织、织构及成形性能的影响[J].钢铁研究学报,2010,22(8):31-35.LIU Hai-tao,MA Dong-xu,LIU Zhen-yu,et al.Effect of finishing temperature on microstructure,texture and formability of ultrapurified ferritic stainless steel[J].Journal of Iron and Steel Research,2010,22(8):31-35.
[8]刘海涛,孙宇,刘振宇,等.热轧工艺对超纯Cr17铁素体不锈钢成形性能的影响[J].材料热处理学报,2011,32(5):46-50.LIU Hai-tao,SUN Yu,LIU Zhen-yu,et al.Effect of hot rolling process on formability of ultra-purified Cr17 ferritic stainless steel[J].Transactions of Materials and Heat Treatment,2011,32(5):46-50.
[9]Tanure L P D A R,Alcntara C M D,Oliveira T R D,et al.Microstructure,texture and microhardness evolution during annealing heat treatment and mechanical behavior of the niobium-stabilized ferritic stainless steel ASTM 430 and niobium-titanium-stabilized ferritic stainless steel ASTM 439:a comparative study[J].Materials Research,2017,20(6):1650-1657
[10]刘海涛,马东旭,高飞,等.退火温度对超纯Cr17铁素体不锈钢冷轧板成形性能的影响[J].东北大学学报(自然科学版),2010,31(9):1266-1269.LIU Hai-tao,MA Dong-xu,GAO Fei,et al.Effect of annealing temperature on formability of cold-rolled ultra-purified Cr17 ferritic stainless steel sheet[J].Journal of Northeastern University(Natural Science),2010,31(9):1266-1269.
[11]Zhang X,Wen Z,Dou R,et al.Evolution of microstructure and mechanical properties of cold-rolled SUS430 stainless steel during a continuous annealing process[J].Materials Science and Engineering A,2014,598(3):22-27.
[12]郭强,严红革,陈振华,等.AZ31镁合金高温热压缩变形特性[J].中国有色金属学报,2005,15(6):900-906.GUO Qiang,YAN Hong-ge,CHEN Zhen-hua,et al.Hot compression deformation behavior of AZ31 magnesium alloy at elevated temperature[J].Chinese Journal of Nonferrous Metals,2005,15(6):900-906.
[13]余永宁.金属学原理(第2版)[M].北京:冶金工业出版社,2013:922-923.
[14]Bae D,Kim S,Kim D,et al.Deformation behavior of Mg-Zn-Y alloys reinforced by icosahedral quasicrystalline particles[J].Acta Materialia,2002,50(9):2343-2356.
[15]Kim W,Chung S,Chung C,et al.Superplasticity in thin magnesium alloy sheets and deformation mechanism maps for magnesium alloys at elevated temperatures[J].Acta Materialia,2001,49(16):3337-3345.
[16]郑善举,郝晓东,洪益成,等.高氮不锈钢的奥氏体晶粒长大规律[J].材料热处理学报,2017,38(7):180-186.ZHENG Shan-ju,HAO Xiao-dong,Hong Yi-cheng,et al.Austenite growth behavior of a new high alloy forged steel for cold working rolls[J].Transactions of Materials and Heat Treatment,2017,38(7):180-186.
[17]刘利刚,张超凡,刘娣,等.新型冷轧辊用高合金锻钢的奥氏体晶粒长大规律[J].材料热处理学报,2017,38(11):65-70.LIU Li-gang,ZHANG Chao-fan,LIU Di,et al.Austenite growth behavior during austenitization of high nitrogen stainless steel[J].Transactions of Materials and Heat Treatment,2017,38(11):65-70.
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