CAJ | 학술논문

用于加工铝合金、镁合金零部件的 AISI H 13热作模具钢因其恶劣的服役环境，现已表现出低寿命的致命缺陷。激光加热淬火工艺因兼有表面强化、残余应力低及与基底保持高的结合之特性，使 AISI H 13热作模具钢具有广阔的应用前景；激光熔覆合金化工艺因具有较强的表面可设计性与使用可靠性，使 AISI H 13热作模具钢具有巨大的发展潜力；热喷涂工艺具有流程短且涂层可设计性等优势，但因涂层与基底呈弱结合之状态，因此应在成分与工艺上进行涂层与基底之间热匹配设计，以满足工程应用的高性能化与长寿命化之需。
용우가공려합금、미합금령부건적 AISI H 13열작모구강인기악렬적복역배경，현이표현출저수명적치명결함。격광가열쉬화공예인겸유표면강화、잔여응력저급여기저보지고적결합지특성，사 AISI H 13열작모구강구유엄활적응용전경；격광용복합금화공예인구유교강적표면가설계성여사용가고성，사 AISI H 13열작모구강구유거대적발전잠력；열분도공예구유류정단차도층가설계성등우세，단인도층여기저정약결합지상태，인차응재성분여공예상진행도층여기저지간열필배설계，이만족공정응용적고성능화여장수명화지수。
Because of their severe working environment,durability of AISI H13 hot-working tool steels used for producing parts of Al alloys and Mg alloys is poor.Hence,based on the introduc-tion of recently developed surface-modified technologies for the steel,laser-heated quenching pro-cessing is considered to be applied widely in engineering field due to its combined advantages of enhanced surface performance,low residual stresses and high bonding between the surface and the substrate,whereas laser cladding processing is considered to present a high potential in application due to its surface designability and employment reliability.Despite the advantages of short route and coating designability in thermal spraying,the bonding of the coating with the steel substate is j ust poor.So thermal spraying has to follow a suitable thermal match design between the coating and the substrate.In conclusion,the surface-modified products by thermal spraying can meet the combined requirements of high performance and high durability.