WB36CN1钢特性参数的模拟

Simulation of Characteristic Parameters of WB36CN1 Steel

采用JMatPro软件对WB36CN1钢的热力学平衡相的组成、TTA曲线、CCT曲线及淬透性进行了模拟计算。结果表明:WB36CN1钢的室温组织主要由95.34%铁素体(质量分数)、G相和极少量渗碳体组成;临界温度A_(c1)和A_(c3)分别为688.4℃和792.4℃;在连续加热过程中,随着加热速率的提高,钢的临界温度A_(c1)、A_(c3)和奥氏体均匀化温度升高,以1000℃·s^(-1)的速率加热的钢奥氏体均匀化的温度和时间相应为975℃和0.96 s;在连续冷却过程中,随着冷却速率的增大,钢的屈服强度、抗拉强度和硬度升高,以100℃·s^(-1)的速率冷却的钢,由于形成了大量马氏体,其屈服强度、抗拉强度和硬度最高;随着离淬火端距离的增加,WB36CN1钢的抗拉强度、屈服强度和硬度减小,淬火端表面的强度和硬度最高,抗拉强度为1271.57 MPa,屈服强度为1012.68 MPa,硬度为41.63 HRC。

Composition of thermodynamically equilibrious phases,TTA curves,CCT curves and hardenability of WB36CN1 steel were simulated and calculated by means of a JMatPro software.The results showed that(a)the room-temperature microstructure of WB36CN1 steel is mainly composed of 95.34% ferrite by mass,G-phase and an extremely small amount of cementite;(b)the critical temperatures A_(c1) and A_(c3) were 688.4 and 792.4℃,respectively;(c)in the continuous heating,as the heating rate increased,so too did the critical temperatures A_(c1) and A_(c3) and temperature required for homogenizing austenite of the steel,and when the steel was heated at 1000℃ per second,the temperature and duration required for homogenizing austenite corresponded to 975℃ and 0.96 s;(d)in the continuous cooling,the yield strength,tensile strength and hardness of the steel all increased with the increase in cooling rate,and the steel cooled at 100℃ per second exhibited maximum yield strength,tensile strength and hardness due to the formation of a large number of martensite;and(e)with the increase in distance from the quenching end,the tensile strength,yield strength and hardness of the WB36CN1 steel decreased,and the surface of quenching end provided as the highest tensile strength as 1271.57 MPa,as the highest yield strength as 1012.68 MPa,and as the highest hardness as 41.63 HRC.