论文部分内容阅读
采用拉伸、冲击与微观组织分析等研究了Q345E钢风电锻件经不同热处理工艺的组织与力学性能。结果表明:在890℃淬火时,随着回火温度的升高,Q345E钢的强度逐渐下降,塑性和韧性逐渐增加;在550℃回火时,Q345E钢综合力学性能随着淬火温度的不同而出现差异,当淬火温度为890℃时,其综合力学性能最佳;Q345E钢的最佳热处理工艺为890℃淬火+550℃回火。在后续生产试验中,经过890℃淬火+550℃回火后,Q345E钢的力学性能均满足要求,屈服强度>395MPa,抗拉强度>530MPa,-40℃冲击功>185J。
Tensile, impact and microstructure analysis were used to study the microstructure and mechanical properties of Q345E steel forgings by different heat treatment processes. The results show that with the increase of tempering temperature, the strength of Q345E steel decreases gradually and the ductility and toughness increase gradually. When tempered at 550 ℃, the mechanical properties of Q345E steel vary with the quenching temperature When the quenching temperature is 890 ℃, its comprehensive mechanical properties are the best. The optimal heat treatment process of Q345E steel is 890 ℃ quenching and 550 ℃ tempering. In the subsequent production test, after 890 ℃ quenching +550 ℃ tempering, Q345E steel mechanical properties meet the requirements, yield strength> 395MPa, tensile strength> 530MPa, -40 ℃ impact energy> 185J.