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探究了热处理工艺对多元低、中碳中合金耐磨铸钢组织和性能的影响,特别分析了它们的强韧化机理。结果表明,低碳合金钢经945℃淬火、280℃回火后硬度值为49 HRC以上,韧性值超过224 J/cm2;中碳合金钢经945℃淬火、370℃回火后硬度值达48.6 HRC,韧性值90 J/cm2左右。两种材料具有较好的回火稳定性,基体组织主要是板条状马氏体,马氏体板条间少量薄膜状的残余奥氏体,以及界面上弥散的碳化物起到强韧化作用,材料综合性能表现良好。
The effects of heat treatment process on microstructure and properties of wear-resistant cast steel with multiple low and medium carbon alloys were explored. In particular, their strengthening and toughening mechanisms were analyzed. The results show that the hardness value of low carbon alloy steel after quenching at 945 ℃ and tempering at 280 ℃ is above 49 HRC and the toughness value is over 224 J / cm2. The hardness of medium carbon alloy steel after quenching at 945 ℃ and tempering at 370 ℃ is 48.6 HRC, toughness value 90 J / cm2 or so. Both materials have good tempering stability, the matrix structure is mainly lath martensite, martensite lath a small amount of film-like residual austenite, as well as the interface of the carbides play a toughening Role, the overall performance of materials performed well.