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对南阳汉冶特钢生产的150mm厚13MnNiMoR钢板进行了相变点的测定,通过JMatPro软件模拟了该钢种的静态CCT曲线。从静态CCT曲线可以看出,要获得良好的贝氏体组织,需控制冷却速度大于5.0℃/s。对小试样采用不同的正火+水冷+回火工艺进行热处理,观察不同热处理状态下的金相组织,并对小试样性能进行了分析。试验结果表明:在930℃正火,水冷至430~490℃后在680℃回火,性能较好。采用该工艺,对150mm厚13MnNiMoR钢板进行热处理,各项性能指标较好。
The phase transition point of 150mm thick 13MnNiMoR steel produced by Nanyang Hanye Special Steel was measured. The static CCT curve of the steel was simulated by JMatPro software. From the static CCT curve it can be seen that to obtain good bainitic structure, it is necessary to control the cooling rate to be greater than 5.0 ° C / s. The small samples were treated by different normalizing, water cooling and tempering processes to observe the microstructure of the samples under different heat treatment conditions. The properties of small samples were also analyzed. The test results show that the performance is good at normalizing at 930 ℃, tempering at 680 ℃ after water cooling to 430 ~ 490 ℃. Using this process, heat treatment of 150mm thick 13MnNiMoR steel, the performance indicators are better.