深冷处理时间对17CrNiMo6钢组织和性能的影响
Effect of Cryogenic Treatment Time on Microstructure and Properties of 17CrNiMo6 Steel
摘要: 对17CrNiMo6钢的处理工艺“淬火(840℃ × 2 h) + 深冷处理(−196℃ × 24 h/48 h) + 回火处理(200℃ × 2 h)”中比较24 h与48 h深冷处理的显微组织与残余奥氏体量，以及材料硬度、耐磨性、塑性等力学性能来探索最佳工艺参数。结果表明，随着深冷处理时间的延长，材料中残余奥氏体含量降低，马氏体中细小碳化物析出增多，有利于材料的耐磨性及塑性的提高，但硬度和冲击吸收功会下降。同时本试验还探究了深冷处理工艺中回火处理对材料硬度及耐磨性的影响，得出回火虽会降低材料表面硬度，但能明显提高耐磨性。
Abstract: In the processing of 17CrNiMo6 steel, “quenching (840˚C × 2 h) + cryogenic treatment 24 h (48 h) + tempering treatment (200˚C × 2 h)”, the microstructure and retained austenite volume of 24 h and 48 h cryogenic treatment, as well as the mechanical properties of material hardness, wear re-sistance and plasticity are compared to explore the best technical parameters. The results show that with the prolongation of the cryogenic treatment time, the retained austenite in the material decreases and the fine carbide precipitation in martensite increases, which is beneficial to the improvement of the wear resistance and plasticity of the material, but the hardness and impact absorption work will decrease. At the same time, the effect of tempering treatment on the hardness and wear resistance of the material in the cryogenic treatment process is also explored. It is concluded that the tempering can reduce the surface hardness of the material, but it can obviously improve the wear resistance.
文章引用：刘政, 赵鹏飞, 李亚微, 蒋显全. 深冷处理时间对17CrNiMo6钢组织和性能的影响[J]. 材料科学, 2018, 8(7): 828-836. https://doi.org/10.12677/MS.2018.87098

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