本文選題：等離子噴涂 + 鎳包石墨�。� 參考：《熱加工工藝》2017年08期

【摘要】：為滿足機(jī)械零部件固體潤(rùn)滑的要求,采用等離子噴涂方法在蠕墨鑄鐵表面制備鎳包石墨涂層,研究其摩擦特性。結(jié)果表明:在4、8、20 N的載荷下,蠕墨鑄鐵與GCr15對(duì)磨摩擦系數(shù)分別為0.64、0.68、0.71,鎳包石墨涂層與GCr15對(duì)磨摩擦系數(shù)分別為0.22、0.18、0.15,鎳包石墨涂層起到明顯的耐磨減磨作用。在4 N載荷下,磨損量從2.8 mg降到1.4 mg;在8 N載荷下,磨損量從3.2 mg降到1.6 mg,在20 N載荷下,磨損量從4.6 mg降到1.8 mg,鎳包石墨涂層與蠕墨鑄鐵基體相比耐磨性顯著提高,因此,鎳包石墨涂層同時(shí)起到減磨與耐磨作用。載荷為4 N時(shí),鎳包石墨涂層的磨損機(jī)制以粘著磨損為主;載荷為8、20 N時(shí),其磨損機(jī)制以磨粒的切削與石墨的潤(rùn)滑減摩為主。
[Abstract]:In order to meet the requirement of solid lubrication of mechanical parts, Ni-coated graphite coating was prepared on the surface of vermicular graphite cast iron by plasma spraying method, and its friction characteristics were studied. The results show that the friction coefficient of vermicular graphite cast iron and GCr15 pair wear is 0.64-0.680.71, and the friction coefficient of nickel-coated graphite coating and GCr15 is 0.220.180.15. the wear resistance of Ni-coated graphite coating is obviously reduced. Under 4 N load, the wear rate decreased from 2.8 mg to 1.4 mg, under 8 N load, the wear rate decreased from 3.2 mg to 1.6 mg, and under 20 N load, the wear rate decreased from 4.6 mg to 1.8 mg. The wear resistance of Ni-coated graphite coating was significantly improved compared with that of vermicular cast iron. Nickel-coated graphite coating can reduce wear and wear resistance simultaneously. When the load is 4 N, the wear mechanism of nickel-coated graphite coating is mainly adhesive wear, and the wear mechanism of Ni-coated graphite coating is mainly abrasive cutting and graphite lubrication and friction reduction when the load is 820 N.
【作者單位】： 長(zhǎng)安大學(xué)材料科學(xué)與工程學(xué)院;西安工業(yè)大學(xué)材料與化工學(xué)院;
【基金】：中央高�；狙袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金資助(310831161018) 陜西省自然科學(xué)基礎(chǔ)研究計(jì)劃(2016JM5059) 陜西省教育廳專(zhuān)項(xiàng)科研計(jì)劃(16JK1382)
【分類(lèi)號(hào)】：TG174.4

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