粉末冶金材料科学与工程
粉末冶金材料科學與工程
분말야금재료과학여공정
POWDER METALLURGY MATERIALS SCIENCE AND ENGINEERING
2014年
6期
983-988
,共6页
王永东%李柏茹%金国%郑光海%刘爱莲
王永東%李柏茹%金國%鄭光海%劉愛蓮
왕영동%리백여%금국%정광해%류애련
氩弧熔覆%复合涂层%原位合成%抗磨性能
氬弧鎔覆%複閤塗層%原位閤成%抗磨性能
아호용복%복합도층%원위합성%항마성능
argon arc cladding%composite coating%In-situ composition%wear resistance
以Ti、C、Nb粉和Ni60A合金粉末为原料，采用氩弧熔覆技术在16Mn钢基材表面分别制备(Ti, Nb)C颗粒增强Ni60A复合涂层(C-Ti-Nb-Ni60A涂层)和Ni60A涂层。应用金相显微镜(OM)、扫描电镜(SEM)、X射线衍射(XRD)对2种涂层的显微组织和物相进行观察与分析，测试涂层的显微硬度和不同载荷下的磨损性能，分析磨损机制。结果表明：C-Ti-Nb-Ni60A 复合涂层与基体间呈冶金结合，界面间无气孔和裂纹；C-Ti-Nb-Ni60A 复合涂层的显微硬度较基体16Mn钢提高近5倍，较Ni60A涂层提高0.45倍；常温干滑动200 N载荷条件下，C- Ti-Nb-Ni60A复合涂层的耐磨性能较基体16Mn钢提高6倍，较Ni60A涂层提高近2倍。16Mn钢表面发生严重的磨粒磨损和粘着磨损，Ni60A涂层表面以磨粒磨损为主，C-Ti-Nb-Ni60A复合涂层的磨损机理为显微檫伤磨损。
以Ti、C、Nb粉和Ni60A閤金粉末為原料，採用氬弧鎔覆技術在16Mn鋼基材錶麵分彆製備(Ti, Nb)C顆粒增彊Ni60A複閤塗層(C-Ti-Nb-Ni60A塗層)和Ni60A塗層。應用金相顯微鏡(OM)、掃描電鏡(SEM)、X射線衍射(XRD)對2種塗層的顯微組織和物相進行觀察與分析，測試塗層的顯微硬度和不同載荷下的磨損性能，分析磨損機製。結果錶明：C-Ti-Nb-Ni60A 複閤塗層與基體間呈冶金結閤，界麵間無氣孔和裂紋；C-Ti-Nb-Ni60A 複閤塗層的顯微硬度較基體16Mn鋼提高近5倍，較Ni60A塗層提高0.45倍；常溫榦滑動200 N載荷條件下，C- Ti-Nb-Ni60A複閤塗層的耐磨性能較基體16Mn鋼提高6倍，較Ni60A塗層提高近2倍。16Mn鋼錶麵髮生嚴重的磨粒磨損和粘著磨損，Ni60A塗層錶麵以磨粒磨損為主，C-Ti-Nb-Ni60A複閤塗層的磨損機理為顯微檫傷磨損。
이Ti、C、Nb분화Ni60A합금분말위원료，채용아호용복기술재16Mn강기재표면분별제비(Ti, Nb)C과립증강Ni60A복합도층(C-Ti-Nb-Ni60A도층)화Ni60A도층。응용금상현미경(OM)、소묘전경(SEM)、X사선연사(XRD)대2충도층적현미조직화물상진행관찰여분석，측시도층적현미경도화불동재하하적마손성능，분석마손궤제。결과표명：C-Ti-Nb-Ni60A 복합도층여기체간정야금결합，계면간무기공화렬문；C-Ti-Nb-Ni60A 복합도층적현미경도교기체16Mn강제고근5배，교Ni60A도층제고0.45배；상온간활동200 N재하조건하，C- Ti-Nb-Ni60A복합도층적내마성능교기체16Mn강제고6배，교Ni60A도층제고근2배。16Mn강표면발생엄중적마립마손화점착마손，Ni60A도층표면이마립마손위주，C-Ti-Nb-Ni60A복합도층적마손궤리위현미찰상마손。
Ni60A composite coating and C-Ti-Nb-Ni reinforced Ni-based composite coating were fabricated on the surface of 16Mn steel by means of argon arc cladding technique using pre-alloyed powders of Ni60A and Nb, Ti and C powders as raw materials. The microstructure, phase constituent, micro-hardness, wear properties of these two kinds of composite coatings were investigated through OM, SEM, XRD, HV2000 Micro-hardness tester and MMS-2B ring block wear test machine, and the wear mechanism was also explored. The results show that excellent metallurgy bonding is formed at the interface between the coating and substrate, there are no pores and cracks in the interface. The micro-hardness of Ti-Nb-C reinforced Ni-based coating is about 5 times higher than that of the substrate, and 0.45 time than that of Ni60A coating. At room temperature, the wear property of Ti-Nb-C reinforced Ni-based coating is 6 times higher than that of the substrate, and 2 times higher than that of Ni60A coating. Severe abrasive wear and adhesive wear occur on the surface of 16Mn steel and abrasive wear is the main wear mechanism occurred in the surface of Ni60A composite coating. The wear mechanism of Ti-Nb-C reinforced Ni-based coating is microscopic abrasions wear.
