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研究了奥氏体化温度对00Cr9Ni9Co5Mo3钢力学性能的影响。结果表明,低于850℃进行固溶处理,钢中马氏体通过α′→γ的无扩散相变形成的逆变奥氏体,继承了锻造组织中的高密度位错,随后的快速冷却过程中形成高强度马氏体钢。此外,奥氏体中的高密度位错增加了马氏体的相变抗性和残余奥氏体的含量,使得马氏体时效钢具有优异的低温韧性。750℃固溶处理后,钢抗拉强度可达1 380 MPa,低温冲击吸收功为60 J。
The effect of austenitizing temperature on the mechanical properties of 00Cr9Ni9Co5Mo3 steel was studied. The results show that the austenite formed by the non-diffusion transformation of α ’→ γ martensite in steel after solution treatment below 850 ℃ inherits the high-density dislocation in the forged structure and the subsequent rapid cooling The process of forming high-strength martensitic steel. In addition, high-density dislocations in austenite increase martensitic phase transformation resistance and residual austenite content, making martensitic steel with excellent low-temperature toughness. After solution treatment at 750 ℃, the tensile strength of steel reaches up to 1 380 MPa and the impact energy at low temperature reaches 60 J.