共搜索到24460条信息，每页显示10条信息，共2446页。用时：0小时0分0秒702毫秒
flexible forming technology can improve the forming limit of sheet metal. Compared with rigid die forming process, the thickness reduction in the punch fillet area significantly decreases... flexible forming; drawing; finite element simulation 1 Introduction Sheet metal stamping forming plays an important role in the fields of automotive, aviation, aerospace, electronics and other......
that the investigation of hot deformation can provide a better selection of deformation parameters to improve the workability of the metal. During hot deformation process, the deformation parameters... parameter (m) is an important factor in describing the hot deformation behavior in forming process. According to the Cottrell- Stokes law, m is considered an independent factor of the strain. DALLA TORRE et......
......
......
and annealing states[J]. Heat treatment of Metals, 2002, 27(5): 8-11. [10] DOEGE E, DRODER K. Sheet metal forming of magnesium wrought alloys-formability and process technology[J]. Journal of Materials... Microstructures and mechanical properties of hot rolled AZ31 Mg alloy sheets FAN Li-kun(范立坤), DONG Jie(董 杰), ZHANG Ping(张 平), ZENG Xiao-qin(曾小勤), DING Wen-Jiang(丁文江) National Engineering......
: The objective of this work is to study the cryogenic sheet metal forming behaviour of precipitation hardening AW-6016-T4. In this regard, the flow curves and forming limit curves were obtained by tension... in the industry. Significant formability improvements may be obtained from the recovery annealing [1], retrogression forming [2], warm forming [3-5], hot stamping [6,7] and superplastic forming [8], heat......
stress and higher forming limit when the morphology of austenite is finer. So soaking time of 3–5 min should be chosen in industrial hot stamping process taking both formability and mechanical... of ultra-high strength boron manganese steels within hot stamping [J]. International Journal of Material Forming, 2009, 2: 259–262. [3] NADERI M, KETABCHI M, ABBASI M, BLECK W. Analysis......
(SEM),透射电镜(TEM),微区X射线衍射(Micro XRD)研究经ER5356焊丝金属极惰性气体保护焊(Metal inert gas, MIG)的7020铝合金厚板焊接接头的微观组织和力学性能.结果表明:7020铝合金MIG焊焊接接头的抗拉强度为268 MPa,屈服强度为231 MPa,伸长率为4.5%,焊接系数约为0.7；焊接接头的焊缝区为树枝状铸造组织；熔合区靠近焊缝一侧为柱状晶,靠近... of metal inert gas (MIG) welding were investigated by OM, SEM, TEM, micro X-ray diffraction, microhardness test and tensile mechanical properties test. The results show that the tensile strength, yield......
metallurgy and hot extrusion CHEN Cun-guang(陈存广)1, 2, HAN Wei-hao(韩未豪)1, QI Miao(祁妙)1, DONG Shi-peng(董诗鹏)1, LI Pei(李沛)1, YANG Fang(杨芳)1, 2, HAO Jun-jie(郝俊杰)1, 2, GUO Zhi-meng(郭志猛)1, 2 1. Institute... ultrahigh-strength Al-10Zn-3.5Mg-1.5Cu alloy was fabricated by powder metallurgy followed by hot extrusion. Investigations on microstructural evolution and mechanical properties of the fabricated samples......
micrographs of hot compression microstructure at deformation degree of 65%: (a) =1 s-1, t=1 000 ℃; (b) =0.01 s-1, t=1 000 ℃ 4 Warm forming temperature of TA15 titanium alloy The experimental research... prevent hydrogenation and surface oxidization during hot forging of titanium alloy in high temperature. To verify whether or not the warm forming temperature of TA15 alloy is feasible, tube spinning......
