基于超快冷技术开发低合金高强度耐磨钢（英文）
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摘要
采用超快冷却技术(UFC)开发了含Nb、Ti、Cr、B的低合金高强度耐磨钢。研究了起始冷却温度和终冷温度对其显微组织和力学性能的影响。结果表明:终轧后采用较高的终轧温度进入超快速冷却时可细化试验钢的原始奥氏体晶粒,防止沉淀粗化;通过控制适当的终冷温度,可获得具有马氏体、贝氏体和残留奥氏体的高强度耐磨钢;在冷却温度为910℃,终冷温度为300℃的条件下,试验钢可获得良好的力学性能。
A low alloy and high strength wear-resistant steel containing Nb,Ti,Cr and B was developed by using ultra-fast cooling technology(UFC). The effects of starting cooling temperature and finishing cooling temperature on microstructure and mechanical properties of the steel were studied. The results show that the primary austenite grain of the tested steel can be refined and the precipitation coarsening can be prevented when the finishing rolling temperature is applied to ultra-fast cooling after finishing rolling. The high strength wear resistant steel with martensite, bainite and retained austenite can be obtained by controlling proper finishing cooling temperature, and good mechanical properties can be obtained under the conditions of starting cooling temperature of 910 ℃ and finishing cooling temperature of 300 ℃.
A low alloy and high strength wear-resistant steel containing Nb,Ti,Cr and B was developed by using ultra-fast cooling technology(UFC). The effects of starting cooling temperature and finishing cooling temperature on microstructure and mechanical properties of the steel were studied. The results show that the primary austenite grain of the tested steel can be refined and the precipitation coarsening can be prevented when the finishing rolling temperature is applied to ultra-fast cooling after finishing rolling. The high strength wear resistant steel with martensite, bainite and retained austenite can be obtained by controlling proper finishing cooling temperature, and good mechanical properties can be obtained under the conditions of starting cooling temperature of 910 ℃ and finishing cooling temperature of 300 ℃.
引文
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[15] Deng X T,Fu T L,Wang Z D,et al.Epsilon carbide precipitation and wear behaviour of low alloy wear resistant steels[J].Materials Science and Technology,2016,32(4):320-327.
[2] Deng X T,Wang Z D,Han Y,et al.Microstructure and abrasive wear behavior of medium carbon low alloy martensitic abrasion resistant steel[J].Journal of Iron and Steel Research,International,2014,21(1):98-103.
[3] Jha A K,Prasad B K,Modi O P,et al.Correlating microstructural features and mechanical properties with abrasion resistance of a high strength low alloy steel[J].Wear,2003,254(1):120-128.
[4] Rendón J,Olsson M.Abrasive wear resistance of some commercial abrasion resistant steels evaluated by laboratory test methods[J].Wear,2009,267(11):2055-2061.
[5] Fu H G,Xiao Q,Fu H F.Heat treatment of multi-element low alloy wear-resistant steel[J].Materials Science and Engineering A,2005,396(1):206-212.
[6] Bakshi S D,Shipway P H,Bhadeshia H K D H.Three-body abrasive wear of fine pearlite,nanostructured bainite and martensite[J].Wear,2013,308(1/2):46-53.
[7] Badisch E,Mitterer C.Abrasive wear of high speed steels:Influence of abrasive particles and primary carbides on wear resistance[J].Tribology International,2003,36(10):765-770.
[8] Deng X T,Wang Z D,Tian Y,et al.An investigation of mechanical property and three-body impact abrasive wear behavior of a 0.27% C dual phase steel[J].Materials and Design,2013,49:220-225.
[9] Wang G D.The new generation TMCP with the key technology of ultra-fast cooling[J].Shanghai Metals,2008,30(2):1-5.
[10] Wang G D,Liu X H,Sun L G,et al.Ultra fast cooling on baotou CSP line and development of 590 MPa grade C Mn low cost hot rolled dual phase steel[J].Iron and Steel,2008,43(3):49-52.
[11] Prasad S N,Sarma D S.Influence of thermomechanical treatment on microstructure and mechanical properties of a microalloyed (Nb+V) weather-resistant steel[J].Materials Science and Engineering A,2005,399(1):161-172.
[12] Deng X T,Wang Z D,Tian Y,et al.An investigation of mechanical property and three-body impact abrasive wear behavior of a 0.27% C dual phase steel[J].Materials and Design,2013,49:220-225.
[13] Li X L,Wang Z D,Deng X T,et al.The determining role of finish cooling temperature on the microstructural evolution and precipitation behavior in an Nb-V-Ti microalloyed steel in the context of newly developed ultrafast cooling[J].Metallurgical and Materials Transactions A,2016,47(5):1929-1938.
[14] Deng X T,Wang Z D,Misra R D K,et al.Transformation and precipitation behaviour of Ti-Mo bearing high strength medium-carbon steel[J].Materials Science and Technology,2013,29(9):1111-1117.
[15] Deng X T,Fu T L,Wang Z D,et al.Epsilon carbide precipitation and wear behaviour of low alloy wear resistant steels[J].Materials Science and Technology,2016,32(4):320-327.