I&Q&P工艺对高硼铁基耐磨合金组织和性能的影响

借助光学显微镜(OM)、扫描电镜(SEM)、X射线衍射分析仪(XRD)和洛氏硬度计等,研究了I&Q&P工艺对高硼铁基耐磨合金组织和性能的影响。结果表明,高硼铁基合金的铸态组织由铁素体、马氏体、残留奥氏体和共晶硼化物组成,硼化物主要为Fe₂B和Fe₂₃(B,C)₆。经I&Q&P工艺处理后,合金中残留奥氏体的体积分数从10.0%上升到16.8%,冲击吸收能量从3.76 J增加到6.80 J,硬度值从59.3 HRC下降至54.0 HRC,并生成了新的硼化物Fe₃(B,C)。同时,合金的耐磨性也有了明显的提高。

Effect of I&Q&P process on microstructure and properties of high-boron iron-based wear-resistant alloy

Effect of I&Q&P process on the microstructure and properties of high-boron iron-based wear-resistant alloys was studied by means of optical microscope(OM), scanning electron microscope(SEM), X-ray diffraction(XRD) and rockwell hardness tester. The results show that the as-cast microstructure of the high-boron iron-based alloys consists of ferrite, martensite, retained austenite and eutectic boride. The boride is mainly Fe₂B and Fe₂₃(B,C)₆. After treated by I&Q&P process, the volume fraction of retained austenite in the alloys is increased from 10.0% to 16.8%, the impact absorbed energy of the alloy is increased from 3.76 J to 6.80 J, the hardness value is decreased from 59.3 HRC to 54.0 HRC, and a new boride Fe₃ (B,C) is generated. At the same time, the wear resistance of the alloy is significantly improved.