轧制复合厚钢板的界面组织及力学性能
|
摘要
以Q345钢为原料,采用组坯抽真空热轧复合的方法制备了55 mm的厚板,利用OM和SEM观察界面微观组织,结果表明,基体和复合界面组织均为珠光体+铁素体,再结晶细化晶粒效果显著。随累计压下率的增加,界面缺陷减少,界面结合强度提高,当累计压下率达到66.0%时,界面剪切强度达到321 MPa,Z向抗拉强度达到520 MPa,断后伸长率最高达到39.5%,满足GB/T 1591—2008《低合金高强度钢》的要求。但复合界面经强酸深度腐蚀后,即使经多道次轧制变形,其仍然存在被强酸腐蚀的痕迹;同时,冲击试验结果表明,复合界面的冲击功低于母材的冲击功。
The thick steel plate of 55 mm was prepared by blanking-vacuum pumping-hot rolling bonding using Q345 steel as raw material. The interfacial microstructure was observed by OM and SEM. The results showed that both the matrix and composite interface were combinations of pearlite and ferrite, and the recrystallization refined the grains remarkably. With the increase in the accumulative reduction ratio, the interface defects reduce and the interface bonding strength is increased. When the accumulative reduction ratio reaches 66.0%, the interfacial shear strength is 321 MPa, Z-direction tensile strength is 520 MPa, and the maximum elongation after fracture reaches up to 39.5%, which satisfy the requirements of the standard GB/T 1591-2008 High strength low alloy structural steels. However, the clad interface deeply etched with strong acid still shows corroded traces after multi-pass rolling deformation. At the same time, the impact test results show that the impact energy of the clad interface is lower than that of the base metal.
The thick steel plate of 55 mm was prepared by blanking-vacuum pumping-hot rolling bonding using Q345 steel as raw material. The interfacial microstructure was observed by OM and SEM. The results showed that both the matrix and composite interface were combinations of pearlite and ferrite, and the recrystallization refined the grains remarkably. With the increase in the accumulative reduction ratio, the interface defects reduce and the interface bonding strength is increased. When the accumulative reduction ratio reaches 66.0%, the interfacial shear strength is 321 MPa, Z-direction tensile strength is 520 MPa, and the maximum elongation after fracture reaches up to 39.5%, which satisfy the requirements of the standard GB/T 1591-2008 High strength low alloy structural steels. However, the clad interface deeply etched with strong acid still shows corroded traces after multi-pass rolling deformation. At the same time, the impact test results show that the impact energy of the clad interface is lower than that of the base metal.
引文
[1] 张莉芹,李德发,吴开明,等.控轧工艺对低压缩比高强度特厚钢板组织性能的影响[J].热加工工艺,2014,43(23):54.(Zhang L Q,Li D F,Wu K M,et al.Effect of controlled rolling process on microstructure and properties of low compression ratio high strength and extra-thick steel plates[J].Thermal Engineering,2014,43(23):54.)
[2] Thomas B G.Continuous casting[J].The Encyclopedia of Materials:Science and Technology,2001(2):1595.
[3] Nishida S,Matsuoka T,Wada T.Technologies and products of 3 steel plate mills in JFE Steel[J].JFE GIHO,2005,5(3):1.
[4] 骆宗安,谢广明,胡兆辉,等.特厚钢板复合轧制工艺的实验研究[J].塑性工程学报,2009,16(4):125.(Luo Z A,Xie G M,Hu Z H,et al.Experimental study on composite rolling process of extra-thick steel plate[J].Journal of Plasticity Engineering,2009,16(4):125.)
[5] 余伟,张烨铭,何春雨,等.轧制复合生产特厚板工艺[J].北京科技大学学报,2011,33(11):1391.(Yu W,Zhang Y M,He C Y,et al.Process of rolling composite production of thick plate[J].Journal of University of Science and Technology Beijing,2011,33(11):1391.)
[6] 王光磊,骆宗安,谢广明,等.首道次轧制对复合钢板组织和性能的影响[J].东北大学学报,2012,33(10):1431.(Wang G L,Luo Z A,Xie G M,et al.Effects of first rolling on microstructure and properties of composite steel plates[J].Journal of Northeastern University,2012,33(10):1431.)
[7] 李文斌,原思宇,李广龙,等.Q345B特厚复合钢板开发[J].钢铁,2015,50(11):88.(Li W B,Yuan S Y,Li G L,et al.Development of Q345B extra-thick composite steel plate [J].Iron and Steel,2015,50(11):88.)
[8] 井玉安,董海雪,孙本良,等.薄规格双金属复合板抗剪强度的测试方法[J].热加工工艺,2011,40(12):103.(Jing Y A,Dong H X,Sun B L,et al.Test method for shear strength of thin specular bimetal composite plates[J].Thermal Process Technology,2011,40(12):103.)
[9] Wang Q,Leng X S,Yan J C,et al.Al 1060/pure iron clad materials by vacuum roll bonding and their solderability[J].Journal of Materials Science and Technology,2013,29(10):948.
[10] Kurotsu T,Segawa A.Evaluation of deformation behavior of oxide scale in hot rolling process by vacuum hot rolling mill[J].Procedia Engineering,2014,81:126.
[11] 谢广明,骆宗安,王国栋,等.轧制工艺对真空轧制复合钢板组织与性能的影响[J].钢铁研究学报,2011,23(12):50.(Xie G M,Luo Z A,Wang G D,et al.Effect of rolling process on microstructure and properties of vacuum rolled composite steel sheets[J].Journal of Iron and Steel Research,2011,23(12):50.)
[12] 李文斌,原思宇,李广龙,等.低合金特厚复合钢板的组织与性能[J].金属热处理,2015,40(6):50.(Li W B,Yuan S Y,Li G L,et al.Microstructure and properties of low alloy extra thick composite steel plates[J].Heat Treatment of Metals,2015,40(6):50.)
[13] Parks J M.The brazing of titanium [J].Welding,1953(3):209.
[14] Jing Y A,Qin Y.The bonding properties and interfacial morphologies of clad plate prepared by multiple passes hot rolling in a protective atmosphere[J].Journal of Materials Processing Technology,2014,214:1686.
[2] Thomas B G.Continuous casting[J].The Encyclopedia of Materials:Science and Technology,2001(2):1595.
[3] Nishida S,Matsuoka T,Wada T.Technologies and products of 3 steel plate mills in JFE Steel[J].JFE GIHO,2005,5(3):1.
[4] 骆宗安,谢广明,胡兆辉,等.特厚钢板复合轧制工艺的实验研究[J].塑性工程学报,2009,16(4):125.(Luo Z A,Xie G M,Hu Z H,et al.Experimental study on composite rolling process of extra-thick steel plate[J].Journal of Plasticity Engineering,2009,16(4):125.)
[5] 余伟,张烨铭,何春雨,等.轧制复合生产特厚板工艺[J].北京科技大学学报,2011,33(11):1391.(Yu W,Zhang Y M,He C Y,et al.Process of rolling composite production of thick plate[J].Journal of University of Science and Technology Beijing,2011,33(11):1391.)
[6] 王光磊,骆宗安,谢广明,等.首道次轧制对复合钢板组织和性能的影响[J].东北大学学报,2012,33(10):1431.(Wang G L,Luo Z A,Xie G M,et al.Effects of first rolling on microstructure and properties of composite steel plates[J].Journal of Northeastern University,2012,33(10):1431.)
[7] 李文斌,原思宇,李广龙,等.Q345B特厚复合钢板开发[J].钢铁,2015,50(11):88.(Li W B,Yuan S Y,Li G L,et al.Development of Q345B extra-thick composite steel plate [J].Iron and Steel,2015,50(11):88.)
[8] 井玉安,董海雪,孙本良,等.薄规格双金属复合板抗剪强度的测试方法[J].热加工工艺,2011,40(12):103.(Jing Y A,Dong H X,Sun B L,et al.Test method for shear strength of thin specular bimetal composite plates[J].Thermal Process Technology,2011,40(12):103.)
[9] Wang Q,Leng X S,Yan J C,et al.Al 1060/pure iron clad materials by vacuum roll bonding and their solderability[J].Journal of Materials Science and Technology,2013,29(10):948.
[10] Kurotsu T,Segawa A.Evaluation of deformation behavior of oxide scale in hot rolling process by vacuum hot rolling mill[J].Procedia Engineering,2014,81:126.
[11] 谢广明,骆宗安,王国栋,等.轧制工艺对真空轧制复合钢板组织与性能的影响[J].钢铁研究学报,2011,23(12):50.(Xie G M,Luo Z A,Wang G D,et al.Effect of rolling process on microstructure and properties of vacuum rolled composite steel sheets[J].Journal of Iron and Steel Research,2011,23(12):50.)
[12] 李文斌,原思宇,李广龙,等.低合金特厚复合钢板的组织与性能[J].金属热处理,2015,40(6):50.(Li W B,Yuan S Y,Li G L,et al.Microstructure and properties of low alloy extra thick composite steel plates[J].Heat Treatment of Metals,2015,40(6):50.)
[13] Parks J M.The brazing of titanium [J].Welding,1953(3):209.
[14] Jing Y A,Qin Y.The bonding properties and interfacial morphologies of clad plate prepared by multiple passes hot rolling in a protective atmosphere[J].Journal of Materials Processing Technology,2014,214:1686.