【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。更多还原

【Abstract】 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 lowcarbon steel against ZrO 2 and Si 3 N 4 ball under 5 N,10 N and 15 N load was evaluated. It 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 ZrO 2 ball with a 5 N load are 0. 15 and 9. 10 "10- 7mm3/ 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 Si 3 N 4 ball is higher than that against ZrO 2 ball. The wear mechanism of the PEB / C treated steel under different load against ZrO 2 or Si 3 N 4 ball is the adhesive wear. It is believed that the excellent wear resistance of the PEB / C treated steel results from the formation of Fe 2 B boronizing layer with high hardness up to 1800 HV.更多还原