锻压技术

HKS-G表面强化技术对Cr8冷作模具钢耐磨性的影响

英文标题：Effect of HKS-G surface strengthening technology on wear resistance of Cr8 cold work die steel

单位：1.中国机械总院集团北京机电研究所有限公司 2. 北京北方车辆集团有限公司

分类号：TG142

出版年,卷(期):页码：2024,49(11):144-148

摘要：

研究一种新型的表面强化处理方法HKS-G，以提高Cr8冷作模具钢表面耐磨性。采用多源多弧离子镀法，在真空状态下通入N2气体，在Cr8冷作模具钢表面形成多元系HKS-G涂层。通过XRD、SEM、EDS、金相显微镜、洛氏硬度仪等研究涂层厚度、组织、性能对材料表面耐磨性的影响。根据Archard模型，利用仿真模拟有涂层和无涂层模具的磨损量，计算模具寿命。结果表明： HKS-G表面涂层厚度为10.8 μm，涂层硬度达到3326 HV。涂层与基体结合较好，且有过渡层存在，涂层的截面硬度梯度变化平缓。HKS-G涂层膜基结合良好，等级为HF1级。HKS-G涂层模具的最大磨损量为2.1×10-8 mm，与无涂层模具相比，最大磨损量减少了23%，模具寿命达到476190次。HKS-G表面强化处理可提高模具材料的耐磨性，延长模具寿命。

A new surface strengthening treatment method HKS-G was studied to improve the surface wear resistance of Cr8 cold work die steel, and using multi-source and multi-arc ion plating method, N2 gas was introduced under vacuum state to form a multi-component HKS-G coating at the surface of Cr8 cold work die steel. Then, the influences of coating thickness, microstructure and properties on the surface wear resistance of the material were studied by XRD, SEM, EDS, metallographic microscope, Rockwell hardness tester, etc. According to the Archard model, the wear amount of coated and uncoated dies were simulated to calculate the die life. The results show that the surface coating thickness of HKS-G is 10.8 μm, and the coating hardness reaches 3326 HV. The coating has a good bonding with the substrate, and there is a transition layer. The hardness gradient of the coating section changes smoothly. HKS-G coating has good adhesion with the grade of HF1. The maximum wear amount of die with HKS-G coating is 2.1×10-8 mm, which is 23% less than that of uncoated die. The die life reaches 476190 times. HKS-G surface strengthening treatment can improve the wear resistance of die materials and extend the die life.

基金项目：

国家重点研发计划资助项目（2016YFB0300405）

作者简介：元莎（1990-），女，博士研究生 E-mail：741916485@qq.com 通信作者：蒋鹏（1964-），男，博士，博士生导师，研究员 E-mail：jp1964@163.com

参考文献：

[1]田新峰,叶立渊.表面处理技术在汽车冲压模具上的应用和经验总结[J].汽车工艺与材料,2020(8):61-68.

Tian X F,Ye L Y. Application of surface treatment technology in automotive stamping die and summary of experience[J]. Automobile Technology & Material, 2020(8):61-68.

[2]张先龙,高盛.冲压模表面强化处理技术和应用[J].模具制造,2012,12(12):76-79.

Zhang X L, Gao S. The surface treatment technology and appliances of stamping die [J]. Die & Mould Manufacture,2012,12(12):76-79.

[3]杨丁丁,刘帅,张宇,等.表面处理技术在汽车覆盖件模具零件中的应用[J].模具工业,2019,45(5):63-65，72.

Yang D D, Liu S, Zhang Y, et al. Application of surface treatment technology in parts of die for automobile cover panel [J]. Die & Mould Industry,2019,45(5):63-65，72.

[4]新井透,王维新.TD法在模具表面处理上的应用[J].模具工业,1986(8):58-64.

Xin J T, Wang W X. Application of TD method in die surface treatment [J]. Die & Mould Industry,1986(8):58-64.

[5]谢志雄，程昌坤，董世杰.TD涂层的组织与性能[J]. 热加工工艺，2005（11）：31-32

Xie Z X, Cheng C K, Dong S J. Microstructure and properties of TD treated coating[J]. Hot Working Technology, 2005 (11): 31-32

[6]邹隽.TD法盐浴渗钒在冷作模表面强化中的应用研究[D]. 武汉: 武汉理工大学,2005.

Zou J. Study on Surface-strengthening of TD Method on Cold-work Die[D]. Wuhan:Wuhan University of Technology, 2005.

[7]GB/T 230.2—2022，金属材料洛氏硬度试验第2部分：硬度计及压头的检验与校准[S].

GB/T 230.2—2022，Metallic materials—Rockwell hardness test—Part 2: Verification and calibration of testing machines and indenters[S].

[8]GB/T 16594—2008,微米级长度的扫描电镜测量方法通则[S].

GB/T 16594—2008,General rules for measurement of length in micron scale by SEM[S].

[9]GB/T 15616—2008,金属及合金的电子探针定量分析方法[S].

GB/T 15616—2008,Quantitative method for electron probe microanalysis of metals and alloys[S].

[10]邓亮. 汽车用金属板料热成形过程中摩擦行为研究进展[J]. 锻压技术,2022,47(4):14-20.

Deng L. Research progress on friction behavior during thermoforming for automotive sheet metal[J]. Forging & Stamping Technology,2022,47(4):14-20.

[11]李行，章志兵，柳玉起，等. 汽车覆盖件模面设计中的复杂大孔洞填充算法[J]. 锻压技术，2023，48(1)：53-58.

Li X，Zhang Z B，Liu Y Q，et al. Filling algorithm on complex large hole in die face design for automotive cover panels [J]. Forging & Stamping Technology，2023，48(1)： 53-58.

[12]方雅，户燕会，任燕，等. 汽车用6061铝型板温冲压减薄预测模型及实验验证[J]. 锻压技术，2023，48(1)：79-83，201.

Fang Y，Hu Y H，Ren Y，et al.Thinning predictive model and experimental verification on warm stampingof 6061 aluminum plate for car [J]. Forging & Stamping Technology，2023，48(1)： 79-83，201.

[13]范芳，肖贵乾，武昭妤，等. 某汽车覆盖件冷切边模具激光熔覆表面强化材料研究[J]. 锻压技术，2023，48(1)：208-215.

Fan F，Xiao G Q，Wu Z Y，et al.Research on laser cladding surface strengthening material for cold trimming die of an automobile panel [J]. Forging & Stamping Technology，2023，48(1)： 208-215.

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