对比了分别经可控渗氮、离子注入形成TiN及可控渗氮+离子 注入Ti2+后，M2高速钢精冲模的使用寿命。结果表明，采用可控渗氮+离子注入Ti 2+的复合处理工艺，可使零件的使用寿命获得明显提高。断口分析、表面硬度测试、 金相分析、XRD和AES分析表明，寿命的提高是由于：（1） 用Jonsson经验公式算得 的该TiN注入层的真实硬度为HV3000，TiN的超高硬度是寿命提高的根本原因；（2 ） 该复合工艺可使M2高速钢表面TiN注入层获得较厚较硬的氮化过渡层，增强了膜基间 的结合力，从而提高了零件的抗磨损和抗冲击性能；（3） 渗氮层增加了钛离子的注入深 度，获得了更宽的TiN改性层，用JT-PRⅡ所得到的模拟计算结果与此吻合得很好
The life experiments of W6Mo5Cr4V2 high speed st eel dies treated respectivelly by controlled nitriding、 ion implantation with T i2++N2+ and a combined technique of controlled nitriding and implant ation with Ti2+ were made. The result shows that, compared with other two techniques, the combined technique can improve the life of the dies by a large margin. Besides the ultrahigh hardness of TiN coating, the thicker and harder n itriding layer, which transited from TiN coating to substrate of M2 high speed s teel, contributes greatly to the life improvement. The transition layer not onl y strengthens the binding force between coating and substrate, but also widens the depth of implanted Ti2+ ion which leads to a thicker TiN modification layer and consists with the computer simlation result of JT-PRⅡ software de veloped by oursleves.
参考文献
| [1] | Jonsson B et al.[J].Thin Solid Films,1984,114(03):257-269. |
| [2] | 陈秋龙 等.4Cr13不锈钢表面复合强化工艺的硬度表征研究[J].上海金属,1995,17(06):18-22. |
| [3] | Bell T.Controlled nitriding in ammonia-hydrogen mixt rure[C].Heat Treatment 73, London: the Metal Society,1975 |
| [4] | 胡明娟;潘健生.钢铁化学热处理原理(修订版)[M].上海:上海交通大学出版社,1996:39. |
| [5] | 胡明娟.高速钢刀具可控渗氮[J].金属热处理学报,1998(01):31-35. |
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