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.这严重地制约铜材料表面熔覆材料的选择范围,继而导致熔覆层功能单一,多数覆层仅起到表面硬化提高耐磨性和耐腐蚀的作用,但导热导电率极差,这对铜及铜合金而言无异于自断一臂. 3.2 高速激光熔覆技术 对常规激光熔覆存在的问题,诞生出高速激光熔覆[38](High-speed laser material deposition),如图4所示,高速激光熔覆技术依靠能量密度更高的汇聚激光和更集中... diagram of laser cladding[38] 高速激光熔覆起初应用于钢表面熔覆硬铬材料以替代高污染电镀铬工艺[38-39].LAMPA等[40]在钢材料表面高速激光熔覆铁铬合金覆层,熔覆速度达到100 m/min,硬度依然可达570 HV0.05,作为硬格镀层的低成本替代材料,经济效益显著.对比(极)高速激光熔覆与常规激光熔覆的区别,在27SiMn钢基体上熔覆SUS 431不锈钢覆层......
drawing of torsion sample(a), welding thermocouple sample(b) and schematic diagram of microstructure observation zone(c) 图3(b)所示为根据式(1)~(3)计算得到350~450 ℃扭转过程中的最大半径处(R=3 mm)等效应力-等效应变曲线.可以看出,在350 ℃扭转时,应......
and cold welding, respectively. In order to produce 10 wt% Al2O3p/7075 preforms, the mixtures were compacted at 400 MPa. Figure 1 Schematic illustration for synthesizing the Al2O3p/7075 composites......
, et al. Growth mechanism of reactants at spot welding interface between aluminum alloy and low carbon steel[J]. The Chinese Journal of Nonferrous Metals, 2017, 27(6): 1176-1181. [21] 黄健康, 何翠翠, 石 玗, 等......
be protected from corrosion through the formation of a surface coating using methods such as chemical conversion, electroplating, electroless plating, microarc oxidation, thermal spraying, laser surface... difference between α-phase and Mn-Al phase [18,19]. ZK60 and ME20 magnesium alloys possess high tensile strength and excellent welding performance, respectively, and are therefore widely used......
, KLOCKE and WEHRMEISTER [74] developed the hybrid process of laser-assisted metal spinning. They reported that when the metal spinning technique was combined with heat applied by a laser beam, even... by hot air in a chamber, laser heating, synchronous heating in a furnace with moving rollers, heating by a heated roller, and friction heating. As a matter of convenience, the workpiece is often......
welding of pipes [J]. Journal of Materials Processing Technology, 1999, 88: 266-275. [23] XU T J, TING Y P. Optimisation on bioleaching of incinerator fly ash by Aspergillus niger–use of central......
. Industrial robotic manipulators were introduced in 1950 to replace humans in dangerous tasks and to increase productivity and improve quality. The transportation, welding, turnery, painting, assembly......
et al [56]. The frame of the model box structure was made by welding steel plate and steel channel sections together. The four upper corners of the box were strengthened by attaching 6 mm thick steel......
, 2017, 75: 95-103. [12] MAGESH S, SUWAS S, SUBRAMANIAN B, GEETHA M. Comparison of electrochemical behavior of hydroxyapatite coated onto WE43 Mg alloy by electrophoretic and pulsed laser deposition[J... of Institutions of Higher Education for Special Welding Materials and Technology, Chongqing 400054, China) Abstract: Magnesium and magnesium alloys have great potential as biomedical materials due......
