直喷汽油(DIG)汽车发动机无声链条系统用温压-高温烧结粉末冶金链轮的开发

Development of Warm Compacted and High Temperature Sintered P/M Sprockets for Silent Chain System of DIG(Direct Injection Gasoline)Automotive Engines

作者们以前报导过非直喷汽油 (一般MPI汽油 )发动机滚子链条系统用温压 -常规温度 ( 114 0℃ )烧结的粉末冶金链轮。在这个新开发的项目中 ,研究了几种温压 -高温烧结的粉末冶金钢的力学性能。为测定这些材料的耐磨性 ,用虚拟发动机进行了磨耗试验。最终开发出了可承受严酷磨耗条件的DIG发动机无声链条系统的链轮。使用的基础粉末是混合粉 (DistaloyDC1)。其含 2 %Ni(质量分数 ) ,Ni粉是通过扩散粘结在Fe - 1 5 %Mo(质量分数 )粉末颗粒上的 ,温压是在 130℃下 ,用这种粉末、阴模及模具进行的。烧结温度为 1190℃。

The authors have previously reported on the warm compacted and normal temperature(1140℃) sintered P/M sprockets of the roller chain system of non-DIG(normal MPI gasoline)engines In this new development,the mechanical properties of several warm-compacted and high-temperature sintered P/M steels were investigated A wear test was also conducted to examine the anti-wear characteristics of these material using dummy engines Finally,sprockets of silent chain system of DIG engines were developed that can endure sever wear conditions The base powder used was a hybrid material(Distaloy DC1) It was 2mass% Ni(nickel) and was diffusion bonded to pre-alloy Fe-1 5mass%Mo(molybdenum) powder The warm compaction was conducted with the powder,die and tools at 130℃ The sintering temperature was 1190℃ and heat treatment was also applied to the sprockets