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首页> 外文期刊>Journal of Materials Engineering and Performance >High Wear-Resistant Aluminum Matrix Composite Layer Fabricated by MIG Welding with Lateral B4C Powder Injection
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High Wear-Resistant Aluminum Matrix Composite Layer Fabricated by MIG Welding with Lateral B4C Powder Injection

机译：采用横向B4C粉末喷射的MIG焊接制造高耐磨铝基复合材料层

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摘要

In this work, a low-cost technique combining MIG welding and lateral powder injection was developed to fabricate B4C particles-reinforced aluminum matrix composite (AMC) layer on a T6 heat-treated 7075 aluminum alloy (AA7075-T6) substrate. The AMC layer was 6-7mm thick and well bonded to the substrate. The B4C particles were dispersed throughout the AMC layer with an average content of approximately 7vol.%. No significant reaction products existed either at the particle-matrix interface or in the Al-matrix. In pin-on-disk dry sliding wear tests against Al2O3 grinding wheels, the AMC layer exhibited excellent wear resistance with volume wear rate approximately 1/10-3/10 that of the quenched AISI 1045 steel and only approximately 2-7% that of the AA7075-T6 alloy under the same wear conditions. A small addition of ceramic particles can greatly improve wear resistance, suggesting that this technique has good prospects for a wide variety of applications.
机译：在这项工作中，开发了一种结合MIG焊接和横向粉末注射的低成本技术，用于在T6热处理的7075铝合金（AA7075-T6）基板上制造B4C颗粒增强铝基复合物（AMC）层。 AMC层厚6-7mm厚，粘合到基材上。 将B4C颗粒分散在整个AMC层中，平均含量约为7Vol。％。 在颗粒基质界面或Al-矩阵中没有任何明显的反应产物存在。 在对Al2O3砂轮上的蜗杆干燥滑动磨损试验中，AMC层具有优异的耐磨性耐磨性，大约1 / 10-3 / 10的淬火AISI 1045钢的耐磨性，仅约2-7％ AA7075-T6合金在相同的磨损条件下。 陶瓷颗粒的少量添加可以大大提高耐磨性，表明该技术具有良好的各种应用前景。

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