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Studies on the Coating Materials for Forming Dies of Advanced High Strength Steel Sheets
Sungchul Cha(차성철),Hoyoung Kong(공호영),Iksoo Kim(김익수),Kunuk Park(박건욱),Hyundal Park(박현달) 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
To increase the safety and lighten the weight of car body and chassis, the application of advanced high strength steel (AHSS) is being rapidly expanded. Current forming dies with thermal diffusion (TD) of vanadium carbide or coatings (AlTiCrN+MoS2, TiAlN) don’t have enough wear resistance and durability. The coatings shall have complex material properties, e.g. wear, temperature, fatigue resistance and low friction property. The main concept of coating and layer development is to add the low friction property through carbon addition to temperature resistant elements. The toughness, fatigue resistance and bonding are realized through nitrided layer, CrN or TiN and multilayer structure. Total 18 coatings are compared and discussed in this work. As conclusion, TiAlCN and AlTiCrN+CN show the competitive solutions.