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高温合金GH4169球头刀铣削表面完整性测试实验研究
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国家自然科学基金面上项目(51875028);国家自然科学基金重点项目(91960203)


Experimental Study on Surface Integrity Test of Superalloy GH4169 Ball-End Cutter Milling
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    摘要:

    利用球头铣刀对高温合金GH4169试件进行铣削加工,并对其加工表面完整性指标进行检测。结果表明:在选取的实验参数条件下,线速度vc对于表面粗糙度Ra、表面显微硬度和加工表面残余应力等表面完整性指标的影响不明显;表面粗糙度Ra和加工表面显微硬度会随着切深ap和每齿进给量fz的增大而增大;高温合金GH4169球头刀铣削加工后的表面残余应力σH呈现为拉应力状态,范围为219.3~338.9 MPa;残余拉应力随着切深ap和每齿进给量fz的增大而减小,原因是随着切深ap和每齿进给量fz的增大,加工表面的塑性变形程度逐渐增加。

    Abstract:

    Superalloy GH4169 specimen was milled by using ball-end milling cutter, and its machined surface integrity indexes were tested. The results show that under the given experimental parameters, the linear velocity vc has no obvious effect on surface integrity indexes such as surface roughness Ra, surface microhardness and residual stress of machined surface; the surface roughness Ra and microhardness of the machined surface increase with the increase of the cutting depth ap and the feed rate per tooth fz ; the surface residual stress σH of the high-temperature alloy GH4169 after milling with a ball-end cutter appears a tensile stress state, ranging from 219.3 MPa to 338.9 MPa; the residual tensile stress decreases with the increase of the cutting depth ap and the feed rate per tooth fz, the reason is that with the increase of cutting depth ap and feed per tooth fz, the plastic deformation degree of the milled surface gradually increases.

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纪任可,郑光明,韩康宁,李勋.高温合金GH4169球头刀铣削表面完整性测试实验研究[J].机床与液压,2022,50(10):36-40.
JI Renke, ZHENG Guangming, HAN Kangning, LI Xun. Experimental Study on Surface Integrity Test of Superalloy GH4169 Ball-End Cutter Milling[J]. Machine Tool & Hydraulics,2022,50(10):36-40

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  • 在线发布日期: 2022-06-30
  • 出版日期: 2022-05-28