Experimental Study on High-efficiency Precision Grinding Process of Inconel625 Nickel Alloy
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摘要: 采用ELID磨削技术对Inconel625镍合金进行高效、精密加工实验。用正交试验设计和灰色系统理论相结合的实验方法,以表面粗糙度为评价指标,对工艺参数的影响作用进行分析研究,获得了优化参数组合,加工出表面粗糙度为48 nm的样件。实验结果表明,在加工Inconel625镍合金实验中,ELID磨削技术可以有效解决Inconel625镍合金传统加工中刀刃磨钝、崩角开裂等加工难题,实现了对Inconel625镍合金的高效、精密加工。
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关键词:
- Inconel625镍合金 /
- ELID磨削技术 /
- 工艺试验 /
- 灰色系统理论
Abstract: In this paper, Electrolytic In-process Dressing(ELID) grinding technology is used to carry out high-efficiency and precision processing experiments of Inconel625 nickel alloy. The experimental method combining orthogonal test design and grey system theory was used to analyze the influence of the surface roughness as the evaluation index on the processing parameters and the optimal parameter combination was obtained. The surface quality with a surface roughness of 48 nm was processed. The experimental results show that ELID grinding technology in the processing of Inconel625 nickel alloy can effectively solve the processing problems such as blunt edge grinding and cracking of the Inconel625 nickel alloy. This experiment achieved the efficient and precision processing of Inconel 625 nickel alloy.-
Key words:
- Inconel625 nickel alloy /
- ELID grinding technology /
- process test /
- grey system theory
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表 1 化学成分
元素 成分/% Ni 58 Cr 20.0~23.0 Mo 8~10 Fe 5 Nb 3.1~4.15 Mn 0.5 Si 0.5 Al 0.4 Ti 0.4 P+S 0.03 C 0.01 Co 0.01 表 2 实验设备
试验设备 型号种类 平面磨床 MSG-612CNC平面精密磨床, 带有ELID模块 砂轮 W10粒度的金属结合剂铸铁金刚石砂轮 电源 专用ELID直流脉冲电源 磨削液 专用研发的塑性磨削液 检测仪器 TR300粗糙度形状检测仪器S-3400NⅡ型扫描电子显微镜 表 3 四因素三水平编码表
因素水平 电解电压A/V 砂轮线速度B/(m·s-1) 切削深度C/μm 占空比D/% 1 30 20 0.5 30 2 50 25 0.8 50 3 70 30 1 70 表 4 正交试验设计表与试验结果
因素水平 电解电压A/V 砂轮线速度B/(m·s-1) 切削深度C/μm 占空比D/% 表面粗糙度Ra/nm 1 30 20 0.5 30 78 2 30 25 0.8 50 75 3 30 30 1 70 79 4 50 20 0.8 70 80 5 50 25 1 30 77 6 50 30 0.5 50 66 7 70 20 1 50 82 8 70 25 0.5 70 73 9 70 30 0.8 30 70 K1 232 240 217 225 - K2 223 225 225 223 - K3 225 215 238 232 - 极差 7 25 21 7 - 表 5 初值处理结果
因素水平 电解电压A/V 砂轮线速度B/(m·s-1) 切削深度C/μm 占空比D/% 表面粗糙度Ra/nm 1 1.000 0 1.000 0 1.000 0 1.000 0 1.000 0 2 1.000 0 1.250 0 1.600 0 1.666 0 0.961 5 3 1.000 0 1.500 0 2.000 2.333 3 1.012 8 4 1.666 7 1.000 1.600 0 2.333 3 1.025 6 5 1.666 7 1.250 0 2.000 0 1.000 0 0.987 2 6 1.666 7 1.500 0 1.000 0 1.666 6 0.846 2 7 2.333 3 1.000 0 2.000 0 1.666 6 1.051 3 8 2.333 3 1.250 0 1.000 0 2.333 3 0.935 9 9 2.333 3 1.500 0 1.600 0 1.000 0 0.897 4 表 6 各因素与粗糙度之间的差序列
因素水平 电解电压A/V 砂轮线速度B/(m·s-1) 切削深度C/μm 占空比D/% 1 0 0 0 0 2 0.038 5 0.288 5 0.638 5 0.705 1 3 0.012 8 0.784 2 0.987 2 1.320 5 4 0.641 0 0.025 6 0.574 4 1.307 7 5 0.679 5 0.262 8 1.012 8 0.012 8 6 0.820 5 0.653 8 0.153 8 0.820 5 7 1.282 1 0.051 3 0.948 7 0.615 4 8 1.397 4 0.314 1 0.064 1 1.397 4 9 1.435 9 0.602 6 0.702 6 0.102 6 表 7 各参数不同水平的灰色关系数
因素水平 电解电压A/V 砂轮线速度B/(m·s-1) 切削深度C/μm 占空比D/% 1 1.000 0 1.000 0 1.000 0 1.000 0 2 0.949 2 0.713 7 0.529 3 0.504 5 3 0.985 2 0.595 7 0.421 1 0.352 2 4 0.528 3 0.965 5 0.555 6 0.354 4 5 0.513 8 0.732 0 0.414 8 0.982 5 6 0.466 7 0.523 4 0.823 5 0.466 7 7 0.359 0 0.933 3 0.430 8 0.538 5 8 0.339 4 0.695 7 0.918 0 0.339 4 9 0.333 3 0.543 7 0.505 4 0.875 2 表 8 4个因素对表面粗糙度的影响程度顺序
因素水平 电解电压A/V 砂轮线速度B/(m·s-1) 切削深度C/μm 占空比D/% 关联度 0.608 0 0.744 7 0.622 1 0.601 5 表 9 各工艺参数不同水平平均关联度
工艺参数 会关联度平均值 1 2 3 电解电压/V 0.971 0.545 1 0.349 4 砂轮线/(m·s-1) 0.945 9 0.759 4 0.518 0 切削深/μm 0.846 2 0.535 0 0.638 2 占空比/% 0.887 0 0.493 3 0.351 1 表 10 优化最优参数组合
电解电压/V 砂轮线/(m·s-1) 切削深/μm 占空比/% 70 30 0.5 70 -
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