杨辉,贾保国,马乐,等.喷丸介质对7050-T7451铝合金表面完整性的影响[J].精密成形工程,2025,17(1):80-86.
YANG Hui,JIA Baoguo,MA Le,et al.Influence of Shot Peening Medium on Surface Integrity of 7050-T7451 Aluminum Alloy[J].Journal of Netshape Forming Engineering,2025,17(1):80-86. |
| 喷丸介质对7050-T7451铝合金表面完整性的影响 |
| Influence of Shot Peening Medium on Surface Integrity of 7050-T7451 Aluminum Alloy |
| 投稿时间：2024-04-15 |
| DOI：10.3969/j.issn.1674-6457.2025.01.010 |
| 中文关键词: 气动喷丸 喷丸介质 表面形貌 表面粗糙度 残余应力 |
| 英文关键词: pneumatic shot peening shot peening medium surface morphology surface roughness residual stress |
| 基金项目: |
|
| 摘要点击次数: 48 |
| 全文下载次数: 7 |
| 中文摘要: |
| 目的 研究相同喷丸强度下，不同喷丸介质对7050-T7451铝合金表面形貌及表面粗糙度的影响。方法 在喷丸强度为0.2 mmA和0.3 mmA条件下，使用铸钢丸ASH230和陶瓷丸AZB425对7050-T7451铝合金进行表面喷丸处理，使用扫描电子显微镜、粗糙度仪、X射线残余应力测试仪等研究了喷丸介质对表面形貌、表面粗糙度、残余应力场的影响。结果 当喷丸强度为0.2 mmA和0.3 mmA时，铸钢丸试样的弹痕直径分别为198.3 μm和230.8 μm，大于陶瓷丸试样的弹痕直径。铸钢丸试样的表面粗糙度分别为4.84 μm和6.24 μm，比陶瓷丸试样的分别高29.5%及23.6%。在相同喷丸强度下，陶瓷丸试样的表面微观应变高于铸钢丸试样的。在残余应力方面，铸钢丸试样在0.2 mmA和0.3 mmA强度下的表面残余压应力分别为−175.5 MPa和−221.5 MPa，显著小于陶瓷丸试样的−280.4 MPa和−335.6 MPa。但铸钢丸试样的残余压应力层深度分别为255.8 μm和278.9 μm，大于陶瓷丸试样的。结论 在相同喷丸强度下，相比于铸钢丸试样，陶瓷丸试样表面弹痕直径更小，粗糙度更低，但表面和最大残余压应力较大。使用陶瓷丸进行喷丸处理会得到更好的表面质量。 |
| 英文摘要: |
| The work aims to study the influence different shot peening medium on the surface morphology and surface roughness of 7050-T7451 aluminum alloy at the same shot peening intensity. The surface of 7050-T7451 aluminum alloy was subject to shot peening treatment by cast steel shot ASH230 and ceramic shot AZB425 under Almen intensities of 0.2 mmA and 0.3 mmA. The influence of shot peening medium on the surface morphology, surface roughness, and residual stress field was studied using scanning electron microscopy, roughness tester, and residual stress tester. When the shot peening intensity was 0.2 mmA and 0.3 mmA, the bullet diameter of the cast steel shot specimen was 198.3 μm and 230.8 μm, respectively, which was larger than that of the ceramic shot specimen. The surface roughness of the cast steel shot specimen was 4.84 μm and 6.24 μm, respectively, which was 29.5% and 23.6% higher than that of the ceramic shot specimen, respectively. At the same shot peening intensity, the surface microscopic strain of the ceramic shot specimen was higher than that of the cast steel shot specimen. In terms of residual stress, the surface residual compressive stress of the cast steel shot specimen at 0.2 mmA and 0.3 mmA was −175.5 MPa and −221.5 MPa, respectively, which was significantly lower than that of the ceramic shot specimen at −280.4 MPa and −335.6MPa. However, the depth of the residual compressive stress layer of the cast steel shot specimen was 255.8 μm and 278.9 μm, respectively, which was larger than that of the ceramic shot specimen. In conclusion, at the same shot peening intensity, compared with the cast steel shot specimen, the ceramic shot specimen has smaller diameter and lower roughness, but larger surface and maximum residual compressive stress. Shot peening with ceramic shots can result in better surface quality. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501719号