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；固溶(淬火)+时效后,合金由等轴α相和晶间β相构成的双态组织,即由初生α相,晶间β相及β相内析出的针状α′相组成. REFERENCES [1] FERRERO J G. Candidate materials for high-strength fastener applications in both the aerospace and automotive industries... titanium alloy fastener[J]. Rare Metal Materials and Engineering, 2006, 35(3): 455-458. [7] LI X W, LU M X, SHA Ai X, ZHANG L. The tensile deformation behavior of Ti-3Al-4.5V-5Mo titanium alloy[J]. Mater......
of temperature gradient 图4 板端扣件处纵向疲劳应力谱 Fig. 4 Longitudinal fatigue stress spectrum of point in slab edge fastener 图5 板中扣件处纵向疲劳应力谱 Fig. 5 Longitudinal fatigue stress spectrum of point in slab mid fastener 3.3 计算结果分析 1) 板厚从190 mm增加至210 mm时,温度梯度时程曲线最大值减小2.4 ℃/m,温度梯度时程曲线最小值绝对值减小2.02 ℃/m. 2) 服役期间轨道板温度梯度时程曲线表现出明显的时变特性,即便是在气候条件接近的同一月份内也因每一天的气温,辐射和日照时间等不同而呈现较大变化.服役期间温度梯度时程曲线和自重荷载作用下纵......
-Si-Y [J]. Trans Nonferrous Met Soc China, 2007, 17(3): 537-540. [2] FERRERO J G. Candidate materials for high-strength fastener applications in both the aerospace and automotive industries [J......
of Impact Engineering, 2005, 32: 473-507. [3] YANG J M, HER Y C, HAN N, CLAUER A. Laser shock peening on fatigue behavior of 2024-T3 Al alloy with fastener holes and stopholes[J]. Materials Science......
Hua-dong. Development of advanced aerospace fastener[J]. Aeronautical Manufacturing Technology, 2009(3): 54-56. [7] 张庆玲, 王庆如, 李兴无. 航空用钛合金紧固件选材分析[J]. 材料工程, 2007(1): 11-14. ZHANG Qing-ling, WANG Qing-ru......
Zefeng. Influence of rail fastener failure on vehicle dynamic derailment[J]. Journal of Traffic and Transportation Engineering, 2006, 6(1): 10-15. [12] 朱剑月. 轨下扣件支承失效对轨道结构动力性能的影响[J]. 振动工程学报, 2011, 24(2): 158-163.ZHU Jianyue. On the effect of rail fastener support failure on the dynamic behavior of railway track[J]. Journal of Vibration Engineering, 2011, 24(2): 158-163. [13] 朱剑月, 张艳. 轨枕吊空对轨道结构动力性能......
震桥梁计算模型. 表2 扣件及滑动层力学参数 Table 2 Mechanical parameters of fastener and sliding layer 采用Midas civil软件对连续梁及简支梁桥建立全桥有限元计算模型.主梁及桥墩根据实际桥梁的尺寸建模,采用二维梁单元模拟.考虑地基的柔性作用效应,在承台底施加3个线性弹簧模拟地基刚度,其中弹簧参数采用m法...] 杨艳丽. WJ-7,WJ-8型扣件纵向阻力现场试验与研究[J]. 铁道标准设计, 2010(2): 51-52. YANG Yanli. Filed test and research of fastener longitudinal resistance on the WJ-7, WJ-8[J]. Railway Standard Design, 2010(2): 51-52. [16] 贾......
nitrogen steels for producing high performance components is shown at a five-stage industrial batch process. With this process a semi-finished product for fastener for automotive industry can... of screws is cut by shearing. After this a thread is rolled at the shaft of components to finish the fastener. Fig. 3 Sequence of manufacturing sketch of component manufactured out of steels 1.5525......
] FERRERO J G. Candidate materials for high-strength fastener applications in both the aerospace and automotive industries[J]. Journal of Materials Engineering and Performance, 2005, 14(6): 691-696. [3......
diameter (3-40 mm), is used for manufacturing bolt and fastener through a cold heading (forging) process. In the cold heading process, the geometry change of products is very radical locally. As a result......
