回火温度对低碳贝氏体钢Q685性能影响的研究  

STUDY ON EFFECT OF TEMPERING TEMPERATURE ON PROPERTIES OF Q685 LOW CARBON BAINITE STEEL

作　　者：韩绍根[1] 娄军魁[1] 杨柳[1] 吴金跃[1] 肖彦中 

机构地区：[1]安阳钢铁股份有限公司

出　　处：《河南冶金》2011年第5期12-13,25,共3页Henan Metallurgy

摘　　要：通过对热轧低碳贝氏体钢Q685不同温度的回火工艺处理,研究了强度、延伸率、冲击性能以及微观组织的变化。结果表明,回火温度对Q685钢的性能产生明显影响。当回火温度为650℃时,屈服强度和抗拉强度分别达到758 MPa和835 MPa,延伸率达到30%,明显高于热轧后的试样;而随回火温度逐渐增加到720℃,性能则显著降低。The change of the strength,the elongation ratio,the impact properties and the microstructure are investigated through tempering process treatment under different temperature for Q685 hot rolled low carbon bainite steel.The results show the tempering temperature has an obvious impact on the properties of Q685 steel.Yielding strength and tensile strength are respectively 758MPa and 835MPa and the elongation ratio is 30% at 650 ℃ tempering temperature,which are obviously higher than those of hot rolled samples.Properties will greatly lowered with the tempering temperature increasing to 720 ℃.

关 键 词：回火温度 低碳贝氏体钢 Q685 性能 

分 类 号：TG156.5[金属学及工艺—热处理]