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取样方式对航空铝合金锻件性能评价结果的影响OA

Influence of sampling method on performance evaluation results of aviation aluminum alloy forgings

中文摘要英文摘要

采用不同方向、不同位置和不同规格3种方式对7055铝合金航空机轮轮毂胎模锻毛坯底部进行取样,检测试样的力学性能,对比分析了不同取样方式对检测结果的影响,及其对锻件性能评价的影响.结果表明:取样方向与锻造流线夹角越大,断后伸长率越小;取样位置如果过于贴近锻坯表面,表面缺陷会使试样的强度和断后伸长率明显偏低;取样位置在流线良好的变形区时,检测结果偏大,取样位置在几何中心时,检测结果可真实反映锻件的服役性能,取样位置在有缺陷的表面和锻造流线良好的非几何中心时,都不可真实反映该锻件的服役性能;在一定区域内,拉伸试样规格不影响检测结果,而当拉伸试样长度穿过流线交接区时,检测结果会出现异常;不恰当的取样方式得出的结果不能用来正确评价机轮轮毂锻坯的力学性能.

The bottom of 7055 aluminum alloy aviation wheel hub tire die forging blank was sampled by three methods of different directions,different positions and different specifications,and the mechanical properties of the samples were tested.The effects of different sampling methods on the test results and their effects on the performance evaluation of forgings were compared and analyzed.The results show that the larger the angle between the sampling direction and the forging streamline,the smaller the elongation after fracture.If the sampling position was very close to the surface of the forging billet,the surface defects would obviously reduce the strength and elongation of the sample.When the sampling position was in the deformation zone with good streamline,the test results were larger.When the sampling position was in the geometric center,the test results could truly reflect the service performance of the forging.When the sampling position was on the defective surface and the non-geometric center with good forging streamline,the service performance of the forging could be truly reflected.In a certain area,the tensile sample specification did not affect the test results,and when the length of the tensile specimen passed through the streamline junction area,the test results were abnormal.The results obtained by improper sampling methods couldn't be used to correctly evaluate the mechanical properties of the forged wheel hub.

周小军;王宇锋;王飞;陈来;田进;李俊

魏桥(苏州)轻量化研究院有限公司, 苏州 215132航空工业贵州安大航空锻造有限责任公司, 安顺 561000贵州新安航空机械有限责任公司, 安顺 561000

7055铝合金取样方式力学性能锻造流线

aluminum alloy forgingsampling methodmechanical propertyforging flow line

《理化检验-物理分册》 2024 (002)

6-9,37 / 5

10.11973/lhjy-wl202402002

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