本文選題：不銹鋼 + 離子滲氮��； 參考：《表面技術(shù)》2015年08期

【摘要】：目的研究304不銹鋼離子滲氮層和氮碳共滲層的組織、硬度及耐磨、耐蝕性能,并考察滲層的磨損機(jī)理。方法利用離子滲氮及氮碳共滲工藝在304不銹鋼表面獲得硬化層,利用XRD,OM及共聚焦顯微鏡、顯微硬度儀、電化學(xué)測試儀,分析處理前后滲層的組織、相結(jié)構(gòu)及滲層的硬度及耐磨耐蝕性能。結(jié)果 304不銹鋼氮碳共滲和滲氮層主要為S相層,在相同工藝條件下,氮碳共滲工藝獲得的滲層為γN+γC的復(fù)合滲層,且厚度大于單一滲氮層。滲氮層和氮碳共滲層硬度約為基體硬度的3.5倍。在干滑動摩擦條件下,氮碳共滲層比滲氮層具有更好的耐磨性能;滲氮層的磨損機(jī)理為磨粒磨損的犁溝效應(yīng)和斷裂,氮碳共滲層的磨損機(jī)理為磨粒磨損的犁溝和微切削。電化學(xué)測試表明,滲氮層和氮碳共滲層的耐蝕性能均優(yōu)于基體。結(jié)論 304不銹鋼在420℃進(jìn)行離子滲氮和氮碳共滲處理后,硬度和耐磨性能可大幅提高,且氮碳共滲處理效果更佳。
[Abstract]:Aim to study the microstructure, hardness, wear resistance and corrosion resistance of 304 stainless steel ion nitriding layer and nitrocarburizing layer, and to investigate the wear mechanism of the layer. Methods the hardened layer was obtained on 304 stainless steel surface by ion nitriding and nitrocarburizing process. The microstructure of the layer was analyzed by XRDX OM, confocal microscope, microhardness tester and electrochemical tester. Phase structure, hardness and wear resistance of infiltrating layer. Results the nitrocarburizing and nitriding layer of 304 stainless steel was mainly S phase layer. Under the same technological conditions, the nitriding layer obtained by the nitrocarburizing process was the compound layer of 緯 N 緯 C, and the thickness of the layer was larger than that of the single nitriding layer. The hardness of nitrided layer and nitrocarburized layer is about 3.5 times of that of matrix. Under the condition of dry sliding friction, the nitrocarburized layer has better wear resistance than nitriding layer, the wear mechanism of nitriding layer is ploughing effect and fracture of abrasive wear, and the wear mechanism of nitrocarburized layer is ploughing and micro-cutting of abrasive wear. Electrochemical tests showed that the corrosion resistance of nitrided layer and nitrocarburized layer was better than that of matrix. Conclusion the hardness and wear resistance of 304 stainless steel treated by ion nitriding and nitrocarburizing at 420 鈩，

本文編號：2066064