Q235低碳钢液相等离子体电解硼碳共渗层摩擦磨损性能  

Friction and wear properties of plasma electrolytic borocarburized Q235 low-carbon steel

作　　者：王彬[1,2,3] 薛文斌[1,2] 吴杰[1,2] 金小越[1,2] 吴晓玲[1,2] 吴正龙[3] 李永良[3] 

机构地区：[1]北京师范大学核科学与技术学院射线束技术与材料改性教育部重点实验室,北京100875 [2]北京市辐射中心,北京100875 [3]北京师范大学分析测试中心,北京100875

出　　处：《材料热处理学报》2014年第2期143-150,共8页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金项目(51071031);北京市自然科学基金项目(2122017);高等学校博士学科点专项科研基金(20120003110010);中央高校基本科研业务费专项资金项目(211105562GK)

摘　　要：采用液相等离子体电解渗入技术在30%硼砂电解液中在Q235低碳钢表面进行硼碳共渗(PEB/C)快速硬化处理,研究与ZrO2、Si3N4组成两种摩擦副及5 N、10 N、15 N 3种载荷条件下PEB/C渗层的摩擦磨损特性。结果表明,PEB/C处理可以明显降低Q235钢基体在干摩擦条件下摩擦系数和磨损率。当与ZrO2球对摩,载荷为5 N时,PEB/C渗层的摩擦系数只有0.15,磨损率减少为9.10"10-7mm3/N#m,摩擦系数和磨损率分别是Q235钢基体的1/4和1/19。载荷增加时,PEB/C渗层的磨损率也随之增加,但它与Si3N4对摩的磨损率要比ZrO2对摩高。在不同载荷下,PEB/C渗层与ZrO2和Si3N4对摩的磨损机制主要为粘着磨损。PEB/C渗层耐磨性较高的原因是Q235低碳钢表面形成了硬度高达1800 HV的Fe2B渗硼层。Plasma electrolytic borocarburizing （PEB/C） technique was applied to fabricate rapidly a hardening layer on Q235 low-carbon steel at 330 V in 30% borax solution with organic additive. The tribological behavior of plasma electrolytic borocarburized Q235 low- carbon steel against ZrOz and Sign4 ball under 5 N, 10 N and 15 N load was evaluated, tt is showed that the PEB/C treatment can significantly reduce friction coefficient and wear rate of the Q235 steel under dry friction. The friction coefficient and wear rate of PEB/C sample against the ZrO2 ball with a 5 N load are 0. 15 and 91 10 xl0-Tmm3/N .m, which are only 1/4 and 1/19 of bare Q235 steel, respectively. The wear rate of the PEB/C treated Q235 steel increases with the increase of the load, but its wear rate against Sign4 ball is higher than that against ZrO2 ball. The wear mechanism of the PEB/C treated steel under different load against ZrO2 or Si3 N4 ball is the adhesive wear. It is believed that the excellent wear resistance of the PEB/C treated steel results from the formation of Fe2B boronizing layer with high hardness up to 1800 HV.

关 键 词：等离子体电解渗 硼碳共渗 摩擦磨损 Q235低碳钢 

分 类 号：TG156.8[金属学及工艺—热处理]