热处理工艺对新型刀具用马氏体不锈钢6Cr15Mo组织和性能的影响

Effect of Heat Treatment Process on Structure and Properties of New Martensite Stainless Steel 6Cr15Mo for Tool

研究了6Cr15Mo钢(%:0.59C、14.96Cr、0.52Mo、0.22V、0.004 6N)1 000～1100℃淬火的组织和硬度,以及1080℃淬火+100～700℃回火时,该钢的组织、硬度和冲击韧性。结果表明,1080℃淬火6Cr15Mo钢硬度值最高(平均HRC值61.6),在500℃回火出现二次硬化峰,冲击韧性较低(12 J/cm^2),采用1 080℃淬火+150～250℃回火,可获得最佳强韧性配合(平均HRC值55,冲击值17 J/cm^2)。

The structure and hardness of steel 6Cr15Mo （%： 0. 59C, 14. 96Cr, 0. 52Mo, 0. 22V, 0.004 6 N） quenched at 1 000 - 1 100 ℃ and the structure, hardness and impact toughness of that steel quenched at 1 080 ℃ ＋ tempered at 100 -700 ℃ have been studied. Results show that the hardness of steel 6Cr15Mo quenched at 1 080 ℃ has high- est hardness （average HRC value 61.6） , the second hardness peak of steel tempered at 500 ℃ occurs with lower impact toughness （ 12 J/cm^2 ） , and the optimum strength-toughness combination of steel is got by quenched at 1 080 ℃ ＋ tempered at 150 -250 ℃ , that is average HRC value 55 with impact value 17 J/cm^2.