论文部分内容阅读
采用商用固体颗粒渗硼剂对用作玻璃模具的灰铸铁进行渗硼处理,渗硼温度为850、900和950℃,渗硼时间为2、4和6 h。使用光学显微镜、扫描电镜和X射线衍射仪分析渗层厚度、组织形貌和物相组成。用HSR-2M磨损试验机研究渗硼试样的耐磨性,并测试其抗氧化性能。结果表明,灰铸铁渗硼层厚度随着渗硼温度的升高和渗硼时间的延长而增加;渗硼层由Fe2B单相组成,并呈针齿状嵌入基体,显微硬度可达1253 HV0.2,耐磨性和抗氧化性显著提高,分别是未渗硼灰铸铁的1.50倍和4.19倍。
Gray iron castings used as glass molds were infiltrated with commercially available solid boronizing agents at boronizing temperatures of 850, 900 and 950 ° C with boronizing times of 2, 4, and 6 h. The thickness, microstructure and phase composition of the layer were analyzed by optical microscope, scanning electron microscopy and X-ray diffraction. The abrasion resistance of boronized specimens was studied by HSR-2M wear tester, and its oxidation resistance was tested. The results show that the thickness of gray cast boron layer increases with the increase of boronizing temperature and boronizing time. The boronizing layer consists of Fe2B single phase and is pin-shaped embedded matrix, the microhardness can reach 1253 HV0 .2, wear resistance and oxidation resistance increased significantly, respectively, 1.50 times and non-boronized gray cast iron 4.19 times.