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采用丝材复合-原位反应方式在球墨铸铁中原位生成了一种碳化钛颗粒束增强体,制备出颗粒束增强铸铁基整体复合材料。使用XRD、SEM(带EDS)、两体磨损试验机对复合材料的矿物组成、宏观和微观结构、化学成分分布以及耐磨特性进行了观察和测试。结果表明:在1138℃保温12 h,钛丝完全反应,原位生成碳化钛颗粒束,并且分布均匀。对单根丝区域的成分分析和形貌观察结果表明颗粒束中碳化钛呈现出3种形态:均匀分散的碳化钛小颗粒、长条状碳化钛颗粒和碳化钛颗粒聚合相。两体磨料磨损试验结果表明复合材料的耐磨性是铸铁标准试样的4倍以上。
In situ synthesis of titanium carbide particle beam reinforcement in nodular cast iron by wire composite - in-situ reaction was used to prepare the particle beam reinforced cast iron matrix composite. XRD, SEM (EDS) and two-body wear tester were used to observe and test the mineral composition, macroscopic and microstructure, chemical composition distribution and wear resistance of the composites. The results showed that the titanium wire reacted completely at 1138 ℃ for 12 h, and the titanium carbide particles were generated in situ and uniformly distributed. The composition analysis and the morphological observation of the single wire area show that the titanium carbide particles in the particle beam exhibit three kinds of morphology: uniformly dispersed titanium carbide particles, elongated titanium carbide particles and titanium carbide particles. Two-body abrasive wear test results show that the wear resistance of composite materials is more than 4 times the standard cast iron.