| 王思佳， 成小乐*， 邓文举， 彭耀， 侯梦楠.热处理工艺对铝基复合材料组织与性能的影响[J].轻工机械,2021,39(6):70-74 |
| 热处理工艺对铝基复合材料组织与性能的影响 |
| Effect of Heat Treatment Process on Microstructure and Properties of Aluminum Matrix Composites |
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| DOI：10.3969/j.issn.1005 2895.2021.06.011 |
| 中文关键词: 铝基复合材料 T6热处理 粉末冶金法 搅拌铸造法 |
| 英文关键词:aluminum matrix composites T6 heat treatment powder metallurgy method stir casting method |
| 基金项目:陕西省重点研发计划资助项目（2018GY 130）；西安市现代智能纺织装备重点实验室项目（2019220614SYS021CG043）。 |
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| 中文摘要: |
| 为了提高铝基复合材料的稳定力学性能，避免发生失效，课题组通过粉末冶金法和搅拌铸造法分别制备了6061Al合金和碳化硼（B4C）质量分数为10%的B4C/6061Al铝基复合材料，然后通过T6工艺对其进行热处理(535 ℃保温5 h后温水淬，165 ℃时效4.5 h)。采用扫描电子显微镜(SEM)观察2种材料的微观组织形态，并运用万能拉伸试验机测试其力学性能。研究结果表明：热处理后的6061Al合金的屈服强度和拉伸强度分别为204和210 MPa；而经过热处理的B4C/6061Al复合材料的屈服强度和拉伸强度分别为221和246 MPa，相对于热处理前的屈服强度和拉伸强度分别提高了66%和62%，但热处理对2种材料的延伸率影响不明显。热处理后的复合材料断裂形态显示出6061Al合金的延性断裂，基体与碳化硼颗粒之间存在界面脱粘以及颗粒产生的断裂现象。 |
| 英文摘要: |
| In order to improve the stable mechanical properties of aluminum matrix composites and avoid failure,[JP2]the 6061Al alloy and B4C/6061Al aluminum matrix composites with 10% mass fraction of B4C were prepared by powder metallurgy method and stir casting method respectively. Then, the composites were heat treated by T6 process (quenched in warm water after holding at 535 ℃ for 5.0 h, and aged at 165 ℃ for 4.5 h).Scanning electron microscope (SEM) was used to observe the microstructure and mechanical properties of the two materials, and universal tensile testing machine was used to test their mechanical properties. [JP]The results show that the yield strength and tensile strength of 6061Al alloy after heat treatment are 204 and 210 MPa, respectively;the yield strength and tensile strength of B4C/6061Al composites after heat treatment are 221 and 246 MPa, respectively, which are increased by 66% and 62% compared with those before heat treatment. But the effect of heat treatment on the elongation of the two materials is not obvious. The fracture morphology of the composites after heat treatment shows the ductile fracture of 6061Al alloy, the interface debonding between the matrix and the boron carbide particles and the fracture phenomenon caused by the particles. |
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