| 摘要: |
| 为改善45钢的抗高温氧化性能，在其表面制备单一Al+注入层和喷丸+Al+注入层。检测表征改性层的表面粗糙度、显微硬度、微观形貌、以及铝元素含量，并进行600℃、200 h下的抗高温氧化性能试验。研究结果表明：喷丸处理45钢表面呈现出凹坑、丘陵状、具有近似等轴状纳米晶结构，Al+注入使纳米晶进一步细化。喷丸处理使45钢的表面粗糙度Ra从0.42 μm增至1.15 μm，显微硬度、注入铝元素含量及氧化增重分别从单一Al+注入层的257 HV0.05增至喷丸+Al+注入层的最高505 HV0.05，从3.7%增至4.2%和从14.8 mg·cm-2降至8.3 mg·cm-2。即喷丸处理有效增强了45钢表面Al+注入层的抗高温氧化性能。 |
| 关键词: 45钢 喷丸处理 Al+注入 抗高温氧化性 |
| DOI：10.11933/j.issn.1007-9289.20180819001 |
| 分类号:TG668 |
| 基金项目:国家自然科学基金（51301144） |
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| Effects of Shot Peening on High Temperature Oxidation Resistance of 45 Steel Surface with Al+ Implantation |
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YANG Hao, MENG Kun, WANG Yuan, CHEN Wengang
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School of Mechanical and Transportation, Southwest Forestry University, Kunming 650224, China
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| Abstract: |
| A single modified layer with Al+ implantation and duplex modified layer with shot peening+Al+ implantation were prepared on the 45 steel surface to improve its high temperature oxidation-resistance. The surface roughness, micro-hardness, micro-morphology and Al content of the modified layers were measured, as well as the high temperature oxidation resistance properties of two layers tested at 600℃ for 200 h, respectively. Results show that the surface of shot peening 45 steel is pitted, hilly and has approximately equiaxed nanocrystalline structure. Al+ implantation further refines the nano-crystalline structure. The surface roughness Ra of 45 steel increase from 0.42 μm to 1.15 μm after shot peening treatment. The micro-hardness and Al content of single Al+ implantation layer and shot peening+Al+ implantation layer increase from 257 HV0.05 to the maximum of 505 HV0.05 and from 3.7% to 4.2%, respectively. The oxidation weight gain decreases from 14.8 mg·cm-2 to 8.3 mg·cm-2. It indicates that shot peening can effectively enhance the high temperature oxidation resistance of the Al+ implanted layer on 45 steel surface. |
| Key words: 45 steel shot-peening Al+ implantation high-temperature oxidation resistance |
