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.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
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)
关键词
等离子体电解渗
硼碳共渗
摩擦磨损
Q235低碳钢
plasma electrolytic saturation
borocarburizing
friction and wear
Q235 low-carbon steel
