减少Cr12钢制砖模具磨损的热处理工艺实验研究

Experiment Research of Heat Treatment Process to Reduce Cr12 Steel Brick Mold Wear

Cr12钢制砖模具经淬火和低温回火处理,在使用过程中容易磨损而失效.为此,对Cr12钢试样进行稀土和硼共渗处理.稀土添加量分别为0%、1%、3%、5%,测定金相组织、渗硼层的深度以及硬度,以确定出最佳的稀土添加量.对最佳添加量的稀土和硼共渗处理后的Cr12钢试样进行淬火和低温回火处理,测定金相组织、硬度和耐磨性,并与仅淬火和低温回火处理的Cr12钢试样进行对比.结果表明,稀土-硼共渗最佳的稀土添加量为3%;经过3%稀土-硼共渗以及淬火和低温回火处理,制砖模具的硬度与耐磨性明显提高.

Cr12 brick molds were treated through quenching and low temperature tempering.They wereworn easily during usage.So RE-boronizing treatment was adopted to Cr12 brick molds.The addition a-mount of rare earth was 0%,1%,3%,3% respectively.Microstructure was studied and Micro-hardness and wear resistance were measured to detect the optimum RE additive amount. Quenching and low tem-perature tempering were operated for 3 % RE-boronizing Cr12 steel.Microstructure was studied and Mi-cro-hardness and wear resistance were measured. The results show that optimal RE additive amount is 3 % during boronizing.Micro-hardness and wear resistance of RE-boronized brick molds are improved ob-viously after quenching and low temperature tempering treatment.