30MnVS非调质钢连铸坯的高温塑性
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摘要
利用Gleeble-3800热模拟试验机测试了30Mn VS非调质钢连铸坯的高温塑性,通过扫描电镜对拉伸试样的断口进行了观察分析,并应用金相显微镜对不同测试温度断口附近显微组织进行观察,分析了各温度区域变形断裂机理。结果表明:30Mn VS非调质钢的第Ⅲ脆性温度区间为650～930℃,塑性温度区间为930～1300℃。因此,该钢连铸坯在实际矫直过程中,过矫直点温度应高于930℃。
The high temperature ductility of cast bloom of non-quenched and tempered steel 30 MnVS was determined on a Gleeble-3800 thermal simulator. The morphology of the fractures was observed by scanning electron microscopy,the microstructure near the fracture at different test temperatures was observed by metallographic microscope,and the deformation and fracture mechanism in each temperature zone was analyzed. The results show that the third temperature range of brittleness of 30 MnVS steel is in the range of 650℃ to 930℃ and the temperature range of ductility is in the range of 930 ℃ to 1300 ℃. Therefore,the straightening temperature of cast bloom of the steel should be higher than 930℃.
The high temperature ductility of cast bloom of non-quenched and tempered steel 30 MnVS was determined on a Gleeble-3800 thermal simulator. The morphology of the fractures was observed by scanning electron microscopy,the microstructure near the fracture at different test temperatures was observed by metallographic microscope,and the deformation and fracture mechanism in each temperature zone was analyzed. The results show that the third temperature range of brittleness of 30 MnVS steel is in the range of 650℃ to 930℃ and the temperature range of ductility is in the range of 930 ℃ to 1300 ℃. Therefore,the straightening temperature of cast bloom of the steel should be higher than 930℃.
引文
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[19]赵艳宇,李国忠,王福明.非调质易切削钢38MnVS连铸坯的高温延塑性[J].特殊钢,2009,30(4):17-18.Zhao Yanyu,Li Guozhong,Wang Fuming.Elevated temperature ductility of cast Bloom of non-quenched and tempered free cutting steel38MnVS[J].Special Steel,2009,30(4):17-18.
[20]杨忠,寇玉山,王海龙,等.曲轴用非调质钢C38N2奥氏体长大行为及热塑性研究[J].金属热处理,2014,39(2):30-33.Yang Zhong,Kou Yushan,Wang Hailong,et al.Austenite grain growth behavior and hot ductility of non-quenched and tempered steel C38N2 for crankshaft[J].Heat Treatment of Metals,2014,39(2):30-33.
[21]Hori S,Suzuki M,Unigame Y.Effect of carbon on the low temperature brittleness of iron[J].Journal of the Japan Institute of Metals,1980,44(2):138-143.
[22]刘青,张立强,王良周,等.汽车用钢连铸坯的高温力学性能[J].北京科技大学学报,2006,28(2):133-137.Liu Qing,Zhang Liqiang,Wang Liangzhou,et al.High temperature mechanical properties of continuously cast blooms for automobile steel[J].Journal of Univernity of Science and Technology Beijing,2006,28(2):133-137.
[23]马立强,袁向前,刘振宇,等.铌微合金钢动态再结晶的规律[J].钢铁研究学报,2006,18(9):47-50.Ma Liqiang,Yuan Xiangqian,Liu Zhenyu,et al.Study on dynamic recrystallization of Nb-microalloyed steels[J].Journal of Iron and Steel Research,2006,18(9):47-50.
[2]刘攀,李卫钊,魏元生,等.中碳微合金非调质钢涨断连杆的开发[J].钢铁研究学报,2015,27(1):46-49.Liu Pan,Li Weizhao,Wei Yuansheng,et al.Development of fracture splitting connecting rod made of mid-carbon and microalloyed steel without quenching and tempering[J].Journal of Iron and Steel Research,2015,27(1):46-49.
[3]甘伟.非调质钢36MnVS6轧后控冷对组织与性能的影响[J].金属热处理,2016,41(10):176-179.Gan Wei.Effect of controlled cooling after rolling on microstructure and properties of microalloyed medium carbon steel 36MnVS6[J].Heat Treatment of Metals,2016,41(10):176-179.
[4]刘栋林,谭利,刘攀,等.38MnVS6非调质钢在汽车转向节上的应用[J].热加工工艺,2014,43(2):80-81.Liu Donglin,Tan Li,Liu Pan,et al.Application of non quenched and tempered steel in steering knuckle[J].Hot Working Technology,2014,43(2):80-81.
[5]印小松,董旭刚,周兵,等.38MnNS5非调质钢曲轴锻后冷却工艺的研究[J].热加工工艺,2017(4):249-250.Yin Xiaosong,Dong Xugang,Zhou Bing,et al.Study on cooling process of 38MnNS5 non-quenched and tempered steel crankshaft after forging[J].Hot Working Technology,2017(4):249-250.
[6]陈思联,邵成伟,惠卫军,等.胀断连杆用高钒中碳钢的动态再结晶行为[J].钢铁研究学报,2015,27(1):73-78.Chen Silian,Shao Chengwei,Hui Weijun,et al.Dynamic recrystallization behavior of medium-carbon vanadium-microalloyed steel for fracture splitting connecting rod[J].Journal of Iron and Steel Research,2015,27(1):73-78.
[7]魏元生.非调质钢在汽车零部件上应用的可行性分析[J].热加工工艺,2014(14):78-82.Wei Yuansheng,et al.Feasible analysis on microalloyed non quenched and tempered forging steels applied in vehicle parts[J].Hot Working Technology,2014(14):78-82.
[8]朱帅帅,王章忠,毛向阳,等.铁素体-珠光体型非调质钢强韧化技术研究进展[J].材料导报,2016,30(9):122-126.Zhu Shuaishuai,Wang Zhangzhong,Mao Xiangyang,et al.A review about strengthening-toughening technologies for ferrite-pearlite nonquenched and tempered steels[J].Materials Review,2016,30(9):122-126.
[9]刘江,文光华,唐萍.微合金钢连铸坯横裂纹研究现状[J].钢铁研究学报,2016,28(10):1-9.Liu Jiang,Wen Guanghua,Tang Ping.Research status of transversal crack on micro-alloyed steel slab[J].Journal of Iron and Steel Research,2016,28(10):1-9.
[10]王明林,杨春政,陶红标,等.微合金化钢连铸坯角部横裂纹形成机制[J].钢铁,2012,47(10):27-39.Wang Mingling,Yang Chunzheng,Tao Hongbiao,et al.Formation mechanism of transverse corner crack on micro-alloyed steel slab[J].Iron and Steel,2012,47(10):27-39.
[11]董志华,陈登福,龙木军,等.20CrMnTi钢连铸坯柱状晶区的高温力学性能[J].材料研究学报,2013,27(3):273-278.Dong Zhihua,Chen Dengfu,Long Mujun,et al.High temperature mechanical properties for the columnar zone of steel 20CrMnTi[J].Chinese Journal of Materials Research,2013,27(3):273-278.
[12]Chen Binhua,Hao Yu.Hot ductility behavior of V-N and V-Nb microalloyed steels[J].International Journal of Minerals Metallurgy and Materials,2012,19(6):525-529.
[13]郝彦英,白素宏,高琦,等.中碳MnV系列非调质钢连铸坯高温力学性能研究及应用[J].连铸,2015(6):63-66.Hao Yanying,Bai Suhong,Gao Qi,et al.Research and application on high temperature mechanical property of medium carbon MnV series non-quenched and tempered steel billet[J].Continuous Casting,2015(6):63-66.
[14]马范军,文光华,唐萍,等.含铌、钒、钛微合金钢连铸坯角部横裂纹研究现状[J].材料导报,2010,24(5):89-91.Ma Fanjun,Wen Guanghua,Tang Ping,et al.Research present of corner transversal crack on the Nb,V and Ti Micro-alloyed steel slab[J].Materials Review,2010,24(5):89-91.
[15]孙彦辉,赵勇,曾亚南,等.Nb-V微合金钢凝固过程的热塑性[J].材料热处理学报,2016,37(2):128-134.Sun Yanhui,Zhao Yong,Zeng Yanan,et al.Hot ductility of Nb-Vcontaining microalloyed steel during solidification[J].Transactions of Materials and Heat Treatment,2016,37(2):128-134.
[16]Campanelli L C,Duarte L T,Bolfarini C.Fatigue behavior of modified surface of Ti-6Al-7Nb and CP-Ti by micro-arc oxidation[J].Materials and Design,2014,64(9):393-399.
[17]陈毛川,王福明,陶素芬,等.40Cr钢的高温热塑性[J].材料热处理学报,2014,35(s1):119-125.Chen Maochuan,Wang Fuming,Tao Sufen,et al.High temperature hot ductility of 40Cr steel[J].Transactions of Materials and Heat Treatment,2014,35(s1):119-125.
[18]张永军,韩静涛,孔俊其,等.SCM435钢连铸坯高温热塑性研究[J].炼钢,2010,26(4):50-54.Zhang Yongjun,Han Jingtao,Kong Junqi,et al.High temperature ductility of grade SCM435 continuous cast slab[J].Steelmaking,2010,26(4):50-54.
[19]赵艳宇,李国忠,王福明.非调质易切削钢38MnVS连铸坯的高温延塑性[J].特殊钢,2009,30(4):17-18.Zhao Yanyu,Li Guozhong,Wang Fuming.Elevated temperature ductility of cast Bloom of non-quenched and tempered free cutting steel38MnVS[J].Special Steel,2009,30(4):17-18.
[20]杨忠,寇玉山,王海龙,等.曲轴用非调质钢C38N2奥氏体长大行为及热塑性研究[J].金属热处理,2014,39(2):30-33.Yang Zhong,Kou Yushan,Wang Hailong,et al.Austenite grain growth behavior and hot ductility of non-quenched and tempered steel C38N2 for crankshaft[J].Heat Treatment of Metals,2014,39(2):30-33.
[21]Hori S,Suzuki M,Unigame Y.Effect of carbon on the low temperature brittleness of iron[J].Journal of the Japan Institute of Metals,1980,44(2):138-143.
[22]刘青,张立强,王良周,等.汽车用钢连铸坯的高温力学性能[J].北京科技大学学报,2006,28(2):133-137.Liu Qing,Zhang Liqiang,Wang Liangzhou,et al.High temperature mechanical properties of continuously cast blooms for automobile steel[J].Journal of Univernity of Science and Technology Beijing,2006,28(2):133-137.
[23]马立强,袁向前,刘振宇,等.铌微合金钢动态再结晶的规律[J].钢铁研究学报,2006,18(9):47-50.Ma Liqiang,Yuan Xiangqian,Liu Zhenyu,et al.Study on dynamic recrystallization of Nb-microalloyed steels[J].Journal of Iron and Steel Research,2006,18(9):47-50.