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利用HB-62.5型布氏硬度计测试了20CrMnTi低碳合金在不同热处理工艺下的布氏硬度值,并与自转式空气锤活塞需用工况下的硬度值进行比较,优选了满足硬度设计要求的热处理工艺;在满足上述硬度要求的热处理工艺基础上,利用HY-930TS万能试验机和HY-608冲击试验机分别对试样进行了拉伸性能和冲击性能试验;在满足新型自转式空气锤活塞需用工况下所需性能参数的前提下,确定了20CrMnTi最佳热处理工艺:880℃×80min油冷+550℃×100min后水冷。
The Brinell hardness values of 20CrMnTi low carbon alloy under different heat treatment processes were tested by using Brinell hardness tester HB-62.5 and compared with hardness values of self-rotating air hammer pistons under different working conditions. The hardness design requirements Of the heat treatment process; to meet the hardness requirements of the heat treatment process based on the use of HY-930TS universal testing machine and the HY-608 impact testing machine were tested for tensile properties and impact properties of the sample; to meet the new rotary air hammer Pistons required under the premise of the performance parameters required conditions, to determine the optimal 20CrMnTi heat treatment process: 880 ℃ × 80min Oil + 550 ℃ × 100min after the water-cooled.