酸洗工序对600 MPa级双相钢组织及性能的影响
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摘要
文章对600 MPa级汽车结构用双相钢热轧板与热轧酸洗板组织与性能进行比较,结果表明:酸洗后屈服强度与抗拉强度均有提高,延伸率变化不大,热轧酸洗板性能满足标准要求;因酸洗工序前要进行拉矫工序,对钢板产生一定的加工硬化,进行系列温度冲击试验,酸洗板的冲击功要比热轧板的冲击功值低;经过酸洗工序后,其组织为大量的多边形铁素体和少量的马氏体,由于冷变形,晶粒度由10. 5级变为12. 0级,晶粒变得更细小。
In this paper,the microstructure and properties of hot rolled 600 MPa grade dual phase steel plate for automobile structure are compared with those of hot rolled pickling plate. The results show that both of the yield strength and tensile strength are improved after pickling,there is no great change for elongation as well as the performances of hot rolled pickling plate could meet the requirements of standard; due to the work hardening of plate caused by withdrawal and straightening process before pickling,the impact energy values of pickling plate are lower than those of hot rolled plate with a series of thermal shock tests; after the pickling process,the microstructure is a large number of polygonal ferrite and a small amount of martensite,the grain size is changed from grade 10. 5 to grade 12. 0 and grain becomes finer because of cold deformation.
In this paper,the microstructure and properties of hot rolled 600 MPa grade dual phase steel plate for automobile structure are compared with those of hot rolled pickling plate. The results show that both of the yield strength and tensile strength are improved after pickling,there is no great change for elongation as well as the performances of hot rolled pickling plate could meet the requirements of standard; due to the work hardening of plate caused by withdrawal and straightening process before pickling,the impact energy values of pickling plate are lower than those of hot rolled plate with a series of thermal shock tests; after the pickling process,the microstructure is a large number of polygonal ferrite and a small amount of martensite,the grain size is changed from grade 10. 5 to grade 12. 0 and grain becomes finer because of cold deformation.
引文
[1]赵博,许广兴,贺飞,等.飞机起落架用超高强度钢应用现状及展望[J].航空材料学报,2017,37(6):1.
[2] Ayer R,Machmeier P M. Transmission electron microscopy ex-amination of hardening and toughening phenomena in Aermet100[J]. Metallurgical Transactions A,1993,24(9):1943.
[3] HUANG S,LI Y,WANG C,et al. Effects of tempering process on properties and microstructure of Aer Met 340 steel[J]. Jinshu Rechuli/Heat Treatment of Metals,2015,40(8):101.
[4] Groh J R,Kauffung T A,Rhoads M A. Methods for inhibiting corrosion of high strength steel turbine components:US,CA2725932A1[P].2017-08-30.
[5]刘振宝,杨志勇,雍歧龙,等.固溶处理对新型马氏体时效不锈钢力学性能的影响[J].钢铁,2007,42(3):47.
[6]王利,杨雄飞,陆匠心.汽车轻量化用高强度钢板的发展[J].钢铁,2006,41(9):1-8.
[7]袁国,利成宁,孙丹丹,等.热轧双相钢的发展现状及高强热轧双相钢的开发[J].中国工程科学,2014,16(2):39-45.
[8] GB 27999—2014,乘用车燃料消耗量评价方法及指标[S].
[9]张大伟,刘雅政,周乐育,等.工艺参数对600MPa热轧双相钢铁素体转变的影响[J].特殊钢,2011,32(2):57.
[10]刘现翠,范建文,谢瑞萍,等.宝钢2030酸洗机组中拉桥机和平整机的延伸率分配[J].北京科技大学学报,2005,27(5):609-612.
[2] Ayer R,Machmeier P M. Transmission electron microscopy ex-amination of hardening and toughening phenomena in Aermet100[J]. Metallurgical Transactions A,1993,24(9):1943.
[3] HUANG S,LI Y,WANG C,et al. Effects of tempering process on properties and microstructure of Aer Met 340 steel[J]. Jinshu Rechuli/Heat Treatment of Metals,2015,40(8):101.
[4] Groh J R,Kauffung T A,Rhoads M A. Methods for inhibiting corrosion of high strength steel turbine components:US,CA2725932A1[P].2017-08-30.
[5]刘振宝,杨志勇,雍歧龙,等.固溶处理对新型马氏体时效不锈钢力学性能的影响[J].钢铁,2007,42(3):47.
[6]王利,杨雄飞,陆匠心.汽车轻量化用高强度钢板的发展[J].钢铁,2006,41(9):1-8.
[7]袁国,利成宁,孙丹丹,等.热轧双相钢的发展现状及高强热轧双相钢的开发[J].中国工程科学,2014,16(2):39-45.
[8] GB 27999—2014,乘用车燃料消耗量评价方法及指标[S].
[9]张大伟,刘雅政,周乐育,等.工艺参数对600MPa热轧双相钢铁素体转变的影响[J].特殊钢,2011,32(2):57.
[10]刘现翠,范建文,谢瑞萍,等.宝钢2030酸洗机组中拉桥机和平整机的延伸率分配[J].北京科技大学学报,2005,27(5):609-612.