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通过成分优化设计,提高实验钢空冷及风冷时的淬透性能,并以ANSYS数值模拟计算出的厚度为500～1000 mm不等的大模块非调质生产时的冷却速度范围为验证条件,验证实验钢的空冷及风冷贝氏体淬透性。结果表明:实验用贝氏体非调质预硬型塑料模具钢达到所需的淬透性能要求,在0.01～0.1℃/s冷速范围内,即大于1000 mm厚度模块模拟冷速范围,依然获得组织均匀的贝氏体,且硬度范围在393～434 HV之间,满足硬度波动在±2 HRC以内的硬度均匀性条件,可应用于厚度在800～1000 mm大模块预硬型塑料模具钢的非调质试生产中。
Through the component optimization design, the hardenability of the experimental steel in air-cooling and air-cooling is improved, and the cooling rate range of non-quenched and tempered large modules with thickness ranging from 500 to 1000 mm calculated by ANSYS is used as verification condition. Verify experimental air cooling and air-cooled bainite hardenability. The results show that the experimental bainitic non-quenched and tempered pre-hardened plastic mold steel achieves the required hardenability requirements. In the cooling speed range of 0.01 ~ 0.1 ℃ / s, that is, the simulated cooling speed range of the module larger than 1000 mm, Uniform bainite is obtained and the hardness range is between 393 and 434 HV, which meets the condition of hardness uniformity within ± 2 HRC and can be applied to pre-hardened plastic mold steel with a thickness of 800-1000 mm The non-quenched and tempered trial production.