本文選題：激光熔覆 + 摩擦磨損�。� 參考：《材料熱處理學(xué)報(bào)》2015年08期

【摘要】：采用激光熔覆對(duì)304不銹鋼表面處理得到不同的熔覆層,研究了激光功率和粉末成分對(duì)涂層磨損量以及摩擦系數(shù)的影響。利用CETR UMT-2型摩擦磨損試驗(yàn)機(jī)進(jìn)行干滑動(dòng)磨損試驗(yàn),采用SURFCOM 130A型粗糙度儀掃描熔覆層表面磨痕,采用ESM及EDS觀察磨損表面形貌,分析其磨損形式。結(jié)果表明:C類涂層(Ni60:92%,C;2%,Mo S2:6%)在1.8 k W激光下制備的涂層C2的磨損量為1.452×10-2mm3,相對(duì)耐磨性達(dá)到基體的6.39倍,磨損形式主要為疲勞磨損,伴隨輕微磨粒磨損;E類涂層(Ni60:92%,C:6%,Mo S2:2%)在2.0 k W激光下制備的涂層E3的磨損量?jī)H為0.925×10-2mm3,耐磨性最好,磨損形式主要為磨粒磨損;添加潤(rùn)滑相的E3涂層的摩擦系數(shù)高于C2,但是在整個(gè)實(shí)驗(yàn)過程中比較穩(wěn)定;磨損特性的改善表明石墨與Mo S2之間有良好的協(xié)同效應(yīng)。
[Abstract]:Different cladding layers were obtained by laser cladding on 304 stainless steel surface. The effects of laser power and powder composition on the wear and friction coefficient of the coating were studied. Dry sliding wear test was carried out by using CETR UMT-2 friction and wear tester. Wear marks were scanned by surfcom 130A rough degree instrument. ESM and EDS were used to observe the wear surface morphology and its wear form was analyzed. The results show that the wear capacity of the coating C2 prepared under 1.8 kW laser is 1.452 脳 10 ~ (-2) mm ~ (3), and the relative wear resistance is 6.39 times that of the substrate. The wear form of C _ 2 coating is mainly fatigue wear, and the wear rate of C _ 2 is 1.452 脳 10 ~ (-2) mm ~ (-3). The wear rate of the coating E3 prepared under 2.0 kW laser is only 0.925 脳 10 ~ (-2) mm ~ (3), the wear resistance is the best, and the wear form is mainly abrasive wear. The friction coefficient of E3 coating with lubricating phase is higher than that of C _ 2, but it is stable in the whole experiment process, and the improvement of wear characteristics indicates that there is a good synergistic effect between graphite and MoS _ 2.
【作者單位】： 溫州大學(xué)機(jī)電工程學(xué)院;江蘇大學(xué)機(jī)械工程學(xué)院;常州光電技術(shù)研究院;
【基金】：科技部中俄雙邊政府間2014-2015科技合作項(xiàng)目(CR17-11) 浙江省國(guó)際科技合作專項(xiàng)(2013C14007) 國(guó)家自然科學(xué)基金項(xiàng)目(51175237,51305050) 溫州市工業(yè)科技研究開發(fā)項(xiàng)目(J20130033)
【分類號(hào)】：TG174.4

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本文編號(hào)：1997424