本文選題：鑄造碳化鎢粉末 + 激光熔覆��； 參考：《稀有金屬材料與工程》2017年04期

【摘要】：為研究鑄造碳化鎢粉末物性對激光熔覆陶瓷顆粒增強Fe基復合材料耐磨性能的影響,將不同制備方法和粒徑的鑄造碳化鎢粉末添加到Fe基合金粉中,在45號鋼表面進行激光熔覆以獲得高硬度和高耐磨的合金化層。利用金相顯微鏡、掃描電子顯微鏡(SEM)、X射線衍射儀(XRD)、硬度計分別分析了合金化層的顯微組織、物相組成以及顯微硬度。利用輪式磨損試驗機測試了其常溫下的耐磨性能,并進行了比較。結果表明:熔覆層主要由萊氏體組成,碳化鎢粉末的制備方法和粒徑差異對復合材料的耐磨性能具有重要影響。等離子旋轉電極霧化法制備的碳化鎢粉末能起到最好的增強耐磨作用,粒徑細的碳化鎢粉末比粒徑粗的粉末增強耐磨效果要好。
[Abstract]:In order to study the effect of the physical properties of cast tungsten carbide powder on the wear resistance of laser cladding ceramic particle reinforced Fe matrix composite, different preparation methods and particle size of cast tungsten carbide powder were added to Fe base alloy powder. High hardness and high wear resistance alloying layer were obtained by laser cladding on 45 steel surface. The microstructure, phase composition and microhardness of the alloyed layer were analyzed by means of metallographic microscope, scanning electron microscope (SEM) and X-ray diffractometer (XRDX). The wear resistance of the wheel wear tester was tested and compared at room temperature. The results showed that the cladding layer was mainly composed of Leydahl, and the preparation method and particle size difference of tungsten carbide powder had an important effect on the wear resistance of the composite. The tungsten carbide powder prepared by the plasma rotating electrode atomization method has the best effect on wear resistance, and the fine tungsten carbide powder is better than the coarse particle size powder.
【作者單位】： 廣東省科學院廣東省材料與加工研究所;
【基金】：國家國際科技合作專項(2011DFR50740) 廣東省戰(zhàn)略性新興產業(yè)核心技術攻關專項(2011A091102007) 廣州市科技計劃專項(2012J5100050) 廣東省科學院科研平臺環(huán)境與能力建設專項資金專項(2016GDASPT-0209) 廣州市科創(chuàng)委創(chuàng)新平臺建設與共享專項(201509010003)
【分類號】：TG174.4

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