表面技术
錶麵技術
표면기술
SURFACE TECHNOLOGY
2015年
8期
61-64,102
,共5页
缪跃琼%林晨%高玉新%郑少梅%程虎
繆躍瓊%林晨%高玉新%鄭少梅%程虎
무약경%림신%고옥신%정소매%정호
304不锈钢%离子渗氮%氮碳共渗%S相%耐磨性能%耐蚀性能
304不鏽鋼%離子滲氮%氮碳共滲%S相%耐磨性能%耐蝕性能
304불수강%리자삼담%담탄공삼%S상%내마성능%내식성능
304 stainless steel%plasma nitriding%nitrocarburizing%S-phase%wear resistance%corrosion resistance
目的：研究304不锈钢离子渗氮层和氮碳共渗层的组织、硬度及耐磨、耐蚀性能,并考察渗层的磨损机理。方法利用离子渗氮及氮碳共渗工艺在304不锈钢表面获得硬化层,利用XRD,OM及共聚焦显微镜、显微硬度仪、电化学测试仪,分析处理前后渗层的组织、相结构及渗层的硬度及耐磨耐蚀性能。结果304不锈钢氮碳共渗和渗氮层主要为S相层,在相同工艺条件下,氮碳共渗工艺获得的渗层为γN+γC的复合渗层,且厚度大于单一渗氮层。渗氮层和氮碳共渗层硬度约为基体硬度的3.5倍。在干滑动摩擦条件下,氮碳共渗层比渗氮层具有更好的耐磨性能；渗氮层的磨损机理为磨粒磨损的犁沟效应和断裂,氮碳共渗层的磨损机理为磨粒磨损的犁沟和微切削。电化学测试表明,渗氮层和氮碳共渗层的耐蚀性能均优于基体。结论304不锈钢在420℃进行离子渗氮和氮碳共渗处理后,硬度和耐磨性能可大幅提高,且氮碳共渗处理效果更佳。
目的：研究304不鏽鋼離子滲氮層和氮碳共滲層的組織、硬度及耐磨、耐蝕性能,併攷察滲層的磨損機理。方法利用離子滲氮及氮碳共滲工藝在304不鏽鋼錶麵穫得硬化層,利用XRD,OM及共聚焦顯微鏡、顯微硬度儀、電化學測試儀,分析處理前後滲層的組織、相結構及滲層的硬度及耐磨耐蝕性能。結果304不鏽鋼氮碳共滲和滲氮層主要為S相層,在相同工藝條件下,氮碳共滲工藝穫得的滲層為γN+γC的複閤滲層,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。在榦滑動摩抆條件下,氮碳共滲層比滲氮層具有更好的耐磨性能；滲氮層的磨損機理為磨粒磨損的犛溝效應和斷裂,氮碳共滲層的磨損機理為磨粒磨損的犛溝和微切削。電化學測試錶明,滲氮層和氮碳共滲層的耐蝕性能均優于基體。結論304不鏽鋼在420℃進行離子滲氮和氮碳共滲處理後,硬度和耐磨性能可大幅提高,且氮碳共滲處理效果更佳。
목적：연구304불수강리자삼담층화담탄공삼층적조직、경도급내마、내식성능,병고찰삼층적마손궤리。방법이용리자삼담급담탄공삼공예재304불수강표면획득경화층,이용XRD,OM급공취초현미경、현미경도의、전화학측시의,분석처리전후삼층적조직、상결구급삼층적경도급내마내식성능。결과304불수강담탄공삼화삼담층주요위S상층,재상동공예조건하,담탄공삼공예획득적삼층위γN+γC적복합삼층,차후도대우단일삼담층。삼담층화담탄공삼층경도약위기체경도적3.5배。재간활동마찰조건하,담탄공삼층비삼담층구유경호적내마성능；삼담층적마손궤리위마립마손적리구효응화단렬,담탄공삼층적마손궤리위마립마손적리구화미절삭。전화학측시표명,삼담층화담탄공삼층적내식성능균우우기체。결론304불수강재420℃진행리자삼담화담탄공삼처리후,경도화내마성능가대폭제고,차담탄공삼처리효과경가。
ABSTRACT:Objective To study the microstructure, hardness and wear and corrosion properties of plasma nitrided and nitrocar-burized layers of 304 austenitic stainless steel, and investigate the wear mechanism of the layers. Methods A nitrided or nitrocar-burized layer was formed on 304 stainless steel substrate by low-temperature plasma nitriding ( PN ) or plasma nitrocarburizing ( PNC) technique. The phase structure, hardness and wear and corrosion properties were comparatively analyzed with XRD, OM, microhardness tester and electrochemical measurement system. Results The nitrided or nitrocarburized layer consisted of expanded austenite ( S-phase) . The composite γN+γC layer was formed by PNC technique with larger thickness under the same process con-dition. The hardness of the two layers was 3. 5 times higher than that of the substrate. The wear property of nitrocarburized layer was better than that of the nitrided layer under dry sliding friction condition. The wear mechanism of PN layer was ploughing actions and fracture, while the wear mechanism of PNC layer was ploughing actions and micro-cutting. The corrosion resistance of both the nitrided and nitrocarburized layers was better than that of the substrate as revealed by electrochemical test. Conclusion PN and PNC treatment at 420℃ could effectively improve the hardness and wear resistance of 304 stainless steel, and the treatment of PNC was better.
