锻压技术

深冷处理对4Cr5MoSiV1热作模具钢磨损性能的影响

英文标题：Influence of deep cryogenic treatment on wear properties for 4Cr5MoSiV1 hot work die steel

作者：饶楚楚张新星

分类号：TG156.91

出版年,卷(期):页码：2022,47(8):235-240

摘要：

为研究深冷处理对4Cr5MoSiV1热作模具钢磨损性能的影响，对不同深冷时间处理的4Cr5MoSiV1钢进行了显微组织分析、硬度测试和磨损性能试验。结果表明：深冷处理可以显著提高4Cr5MoSiV1热作模具钢的硬度和耐磨性能，经1030 ℃×40 min 淬火+（-196 ℃）×24 h深冷处理+500 ℃×2 h二次回火处理后，在25和600 ℃温度条件下的磨损率分别为1.4×10-5和2.7×10-5 g·m-1，与常规热处理相比，分别降低了30.0%和34.1%，其硬度达到55.2 HRC，较常规热处理提高了14.8%。深冷处理可以使4Cr5MoSiV1热作模具钢组织中的残余奥氏体向马氏体转变，并促使细小且弥散性的碳化物析出，从而提高了其耐磨性能。

In order to study the influence of deep cryogenic treatment on the wear properties of 4Cr5MoSiV1 hot work die steel, the microstructure analysis, hardness test and wear property test of 4Cr5MoSiV1 steel treated with different deep cryogenic times were carried out. The results show that the cryogenic treatment can significantly improve the hardness and wear resistance property of 4Cr5MoSiV1 hot work die steel. After 1030 ℃×40 min quenching + （-196 ℃）×24 h deep cryogenic treatment + 500 ℃×2 h secondary tempering treatment, the wear rates at 25 and 600 ℃ are 1.4×10-5 and 2.7×10-5 g·m-1, respectively, which is reduced by 30.0% and 34.1% respectively compared with the conventional heat treatment, and its hardness reaches 55.2 HRC, which is increased by 14.8% compared with the conventional heat treatment. Thus, the deep cryogenic treatment can transform the residual austenite into martensite in the structure of 4Cr5MoSiV1 hot work die steel, and promote the precipitation of the fine and dispersible carbides, and thereby improve its wear resistance property.

基金项目：

浙江省基础公益研究计划项目（LGC22E050006）；衢州市科技攻关项目（2021K30）

作者简介：饶楚楚(1987-)，女，硕士，副教授，工程师，E-mail：raochuchu@163.com

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