摘要
研究了H13钢高能喷丸辅助双保温固体渗硼试样和未渗硼试样的高温摩擦磨损性能,并探讨了磨损机理。结果表明,高能喷丸辅助双保温固体渗硼后的试样得到Fe2B单相渗硼层,高能喷丸能显著提高固体渗硼效率;渗硼试样的高温磨损率比未渗硼试样降低了30%,表明渗硼提高了H13钢的高温耐磨损性能。渗硼和未渗硼试样高温摩擦磨损后磨损表面均形成了氧化层,氧化物为Fe2O3。渗硼层在高温下具有较高的硬度及良好的抗氧化性,因此渗硼试样的高温磨损机理主要是渗硼层的疲劳剥落和氧化磨损,而未渗硼试样的高温磨损机理主要为氧化磨损和磨粒磨损协同机制。
The friction and wear performance of H 13 steel after a duplex pack boriding treatment assisted by high-energy shot peening the un-borided one were investigated. The experimental results show that a layer of monophase of Fe2B formed on H13 steel after the two-step pack boriding treatment assisted by high-energy shot peening; the high-energy shot peening can remarkably enhance the boriding process： The wear rate at elevated temperature of the boronized H13 steel may be reduced up to 30% in comparison with that of the bare steel. The oxide scales formed on the wear surface of the boronized steel and the bare steel all are Fe20~. A wear mechanism concerning the elevated temperature wear is proposed that the boronized H13 steel may firstly suffered from fatigue flake of boride layer and subse- quently oxidation wear due to its high hardness and excellent oxidation resistance. However, the elevated temperature wear mechanisms of the bare steel are synergistically oxidation wear and abrasive wear.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2014年第3期220-226,共7页
Chinese Journal of Materials Research
基金
上海市重点学科建设项目S30107资助~~
