| 粉末烧结法和铸造法制备ZrO2增韧Al2O3陶瓷颗粒增强高铬铸铁基复合材料及其耐磨性能 |
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| 引用本文： | 高颖超,孙书刚,钱兵,汪兴兴,吕帅帅,朱昱,倪红军.粉末烧结法和铸造法制备ZrO2增韧Al2O3陶瓷颗粒增强高铬铸铁基复合材料及其耐磨性能[J].复合材料学报,2021,38(8):2676-2683. |
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| 作者姓名： | 高颖超 孙书刚 钱兵 汪兴兴 吕帅帅 朱昱 倪红军 |
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| 作者单位： | 1.南通大学 机械工程学院，南通 226019 |
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| 基金项目： | 江苏省重点研发计划项目(BE2016107)；江苏高校优势学科建设工程资助项目(PAPD) |
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| 摘 要： | 将粒径为1~2 mm的ZrO2增韧Al2O3陶瓷颗粒(ZTAp)、高铬合金粉末和黏结剂混合真空烧结制备蜂窝状预制体，再浇注高铬铸铁液制备出ZTAp增强高铬铸铁基复合材料。采用SEM、EDS、XRD分析复合材料的界面微观结构和物相组成，通过三体磨损试验评价复合材料的耐磨性能。结果表明，烧结高铬铸铁基体在铸造过程中发生重熔，与铸造高铬铸铁基体呈冶金结合，ZTAp与金属基体界面结合致密，无裂纹、气孔等缺陷。复合材料三体耐磨性能达到高铬铸铁的3倍以上。将该复合材料应用于制备磨辊件，经过5 000 h服役，柱状区和复合区在磨辊半径方向上的磨损量分别为8.2 mm、5.9 mm，预计寿命可达到高铬铸铁磨辊的2倍以上。
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| 关 键 词： | ZrO2增韧Al2O3 高铬铸铁 复合材料 粉末烧结 铸造 三体磨损 |
| 收稿时间： | 2020-08-24 |
Preparation and wear resistance of ZrO2 toughened Al2O3 ceramic particles reinforced high chromium cast iron matrix composites by powder sintering and casting |
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| Affiliation: | 1.School of Mechanical Engineering, Nantong University, Nantong 226019, China2.Nantong Gaoxin Antiwear Technology CO. LTD., Nantong 226011, China3.School of Mechanical Engineering, Nantong Institute of Technology, Nantong 226002, China |
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| Abstract: | The honeycomb preforms were prepared by vacuum sintering the mixture of ZrO2 toughened Al2O3 ceramic particles (ZTAp) of 1-2 mm, high chromium alloy powder and binder. ZTAp reinforced high chromium cast iron composites were then prepared by pouring high chromium cast iron. The interface microstructure and phase composition of the composites were analyzed by SEM, EDS and XRD. The wear resistance of the composite was evaluated by three-body abrasive wear test. The results show that the matrix of sintered high chromium cast iron is remelted in the process of casting and is metallurgical bonded with cast high chromium cast iron matrix. The interface between ZTAp and metal matrix is compact, and there are no defects such as cracks and pores. The three-body abrasive wear resistance of the composites is more than 3 times of that of high chromium cast iron. The composites are applied to the preparation of grinding roller parts. After 5 000 h of service, the wear loss of the columnar zone and composite zone in the direction of grinding roller radius are 8.2 mm and 5.9 mm, respectively, and the expected service life can be more than twice that of the high chromium cast iron grinding roller. |
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