Laser Scanning in situ Deposition of Large Area YBa_2Cu_3O_(7-x) Superconducting Films

One of the most promising near-term applications of high T_c superconductingfilms is in the area of passive microwave devices. The most remarkable feature ofthese microwave devices is that the high-frequency surface resistance ofsuperconducting films is smaller than that of metal thin films. The size of themicrowave devices is dictated by wavelength and the thin films are generally requiredto be not smaller than a few square centimeters. Though pulsed laser deposition

CrWMn钢激光宽带相变强韧化处理

采用激光宽带扫描对CrWMn钢进行了相变强韧化处理,对硬化层的显微组织和硬度进行了分析与测试。结果表明,对CrWMn钢激光扫描搭接量的选择12%～16%较好,距表面0.1～0.3 mm处硬度平均可达720 HV。

38CrMoAlA激光宽带相变强韧化处理

介绍了38CrMoAlA在激光宽带扫描作用下各工艺参数对淬火层组织的影响,并对38-CrMoAlA显微硬度进行了测量与分析,38CrMoAlA不同搭接量的选择、38CrMoAlA淬火硬层显微镜组织也进行了观察与分析。

H11模具钢激光宽带相变硬化处理

研究H11钢在激光宽带扫描作用下各工艺参数对淬火层的影响,对H11钢显微硬度进行了测量分析,对H11钢不同搭接量进行了选择,并对H11钢淬火硬层显微镜组织进行了观察分析.

40CrNiMoA激光宽带相变硬化处理

研究了40CrNiMoA钢在激光宽带相变硬化处理各工艺参数对合金显微硬度的影响．实验结果表明：40CrNiMoA激光宽带相变硬化处理搭接量的选择范围为14％-18％，激光宽带相变硬化处理后合金组织明显细化导致表面强化，淬层硬度可达到700HV以上，并且沿激光作用区横向硬度呈明显规律分布；探讨了40CrNiMoA激光宽带相变硬化相应机制．图13，表2，参13．