塑料模具钢NAK80和S136的耐磨性能对比研究

谢毅; 鲜勇

doi:10.7513/j.issn.1004-7638.2021.04.024

塑料模具钢NAK80和S136的耐磨性能对比研究

doi: 10.7513/j.issn.1004-7638.2021.04.024

谢毅^1,,
鲜勇^2, ,

1.
重庆三峡职业学院汽车工程学院，重庆万州 404000
2.
成都工业学院材料与环境工程学院，四川成都 611730

详细信息

作者简介:
谢毅（1983−），男，重庆万州人，硕士，讲师，研究方向：工程机械耐磨材料，E-mail：429819630@qq.com；

通讯作者:
鲜勇（1983−），男，四川南充人，博士，教授，研究方向：钢铁冶金、金属基复合材料，E-mail：cdxianyong@163.com

中图分类号: TF76, TG142.7
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出版历程
- 收稿日期: 2021-06-26
- 刊出日期: 2021-08-10

Comparative study on wear resistance of plastic die steels NAK80 and S136

Xie Yi^1
,,
Xian Yong^{2
, ,}

1.
School of Automotive Engineering, Chongqing Three Gorges Vocational College, Wanzhou 404000, Chongqing, China
2.
School of Materials and Environmental Engineering, Chengdu Technological University, Chengdu 611730, Sichuan, China

摘要

摘要: 以预硬化塑料模具钢NAK80和S136为研究对象，对比研究了两者的显微硬度、金相组织以及不同载荷下的摩擦磨损行为。结果表明： NAK80 钢金相组织为板条状马氏体和粒状贝氏体，S136钢的金相组织为铁素体基体和细小碳化物，显微硬度(HV)分别为405.01 ± 10.63 和354.21 ± 6.14 。NAK80和S136钢的摩擦系数均随着载荷的增加而降低，在60 N时，两者都达到各自最低的摩擦系数（0.34和0.37），当载荷增加至80 N，摩擦系数反而上升。整体而言，S136的摩擦系数高于NAK80。不同载荷条件下，NAK80的磨损行为具有高的载荷敏感性；而S136具有更加稳定的耐磨性。低载荷时，以磨粒磨损和剥层磨损为主，NAK80耐磨性优于S136；高载荷时，以粘着磨损和磨粒磨损为主，S136钢耐磨性优于NAK80。
- 模具钢 /
- 载荷 /
- 硬度 /
- 组织 /
- 耐磨性能
Abstract: The microhardness, microstructure, friction and wear behavior of pre-hardened plastic die steels NAK80 and S136 were studied. The results show that the microstructure of NAK80 steel consists of lath martensite and granular bainite, while that of S136 steel are ferrite matrix and fine carbides, and the microhardness is 405.01 ± 63 HV and 354.21 HV ± 6.14 HV respectively. The friction coefficients of NAK80 and S136 steel decrease with the increase of load. At 60N, the friction coefficients of NAK80 and S136 steel reach their lowest values (0.34 and 0.37). However, when the load increases to 80 N, the friction coefficient increases. Overall, the friction coefficient of S136 is higher than that of NAK80. The wear behavior of NAK80 has high load sensitivity under different load conditions while S136 has more stable wear resistance. At low load, abrasive wear and delamination wear are dominant, and the wear resistance of NAK80 is better than that of S136. At high load, adhesive wear and abrasive wear are dominant, and the wear resistance of S136 steel is better than that of NAK80.
- die steel /
- load /
- hardness /
- microstructure /
- wear resistance properties

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图 1 试验钢的金相组织

Figure 1. Metallographic structures of tested steels

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图 2 试验钢的摩擦系数

Figure 2. Friction coefficient of tested steels

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图 3 试验钢的体积磨损率

Figure 3. Volume wear rate of tested steels

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图 4 磨痕形貌

Figure 4. Morphology of wear scar of NAK80

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表 1 试验钢的主要化学成分

Table 1. Main chemical compositions of tested steels %

牌号	C	Si	Mn	Ni	Cu	Al	Mo
NAK80	0.15	0.3	1.5	3	1	1	0.3

牌号	C	Si	Mn	Cr	V	S	P
S136	0.38	0.9	0.5	13.6	0.3	≤0.03	≤0.03

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表 2 试验钢磨痕数据

Table 2. Wear track data of tested steels

载荷/N	磨痕宽度/mm		磨痕深度/μm		磨损量/mm³
载荷/N	NAK80	S136	NAK80	S136	NAK80	S136
20	0.989	1.149	66.033	73.428	0.045	0.111
40	1.427	1.524	58.201	60.095	0.234	0.245
60	1.704	1.490	118.003	107.620	0.532	0.307
80	1.918	1.838	119.513	102.997	0.704	0.579

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参考文献(5)

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