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500～1000mm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1000mm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393～434HV之间，满足硬度波动在＂4-2HRC以内的硬度均匀性条件，可应用于厚度在800～1000mm大模块预硬型塑料模具钢的非调质试生产中。
This study aimed to improve the hardenability of non-quenched and tempered prehardened steel for large section plastic mould during natural convection and forced air cooling by chemical composition optimization. Commercial finite element software ANSYS was used to simulate the cooling rate ranges of the samples with thickness ranging from 500 to 1000 ram. The bainite hardenability of the test steel was evaluated according to simulated cooling rates. The results show that a homogeneous bainite mierostructure is obtained with cooling rates between 0. 01 and 0. 1 ℃/s, which are identified by simulation of sample with thickness of 1000 mm. The hardness range of the steel is 393 - 434 HV and met the hardness uniformity requirement of ± 2 HRC. The test steel can be used in trial productions of non- quenched and tempered prehardened steel for large section plastic mould with thickness ranging from 800 to 1000 ram.
参考文献
| [1] | 陈再枝;马党参.塑料模具钢应用手册[M].北京:化学工业出版社,2005 |
| [2] | 罗毅;吴晓春 .预硬制塑料模具钢的研究进展[J].金属热处理,2007,32(12):24-26. |
| [3] | 罗毅;吴晓春;张洪奎 等.大截面非调质和调质预硬型塑料模具钢的组织与变特性[J].机械工程材料,2009,33(02):53-55. |
| [4] | 罗毅;吴晓春;张洪奎 等.大截面非调质预硬型塑料模具钢的组织与变特性[J].金属热处理,2009,33(02):53-55. |
| [5] | 罗毅 .非调质塑料模具钢的设计与研究[D].上海:上海大学,2009. |
| [6] | 张朝晖.Ansys热分析教程与实例解析[M].北京:中国铁道出版社,2007 |
| [7] | 陈健.大锻件的冷却曲线及淬透性的计算方法[J].大型铸锻件,1984(02):1-15. |
| [8] | 荀毓闽;余永平;吴跃 .结构钢组织和性能的计算机预测[J].金属热处理学报,1997,18(01):45-49. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%