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有2种:欧美国家采用的氩气雾化法(AA)和俄罗斯等国家采用的等离子旋转电极法(PREP)[2].气体雾化法[3]是利用高压气体在雾化喷嘴产生的高速气流,将合金液流冲击破碎雾化成微米级尺度的细小熔滴,随后熔滴在飞行过程中球化并与周围气体介质进行热交换,快速冷却凝固成粉末[4],产量大,效率高,制备的粉末晶粒细小,少或无成分偏析,合金元素固溶度高,粉末热成形后组织均匀性好,夹杂物尺寸小,特别是用氩气雾..., 2008, 18(6): 5-9. [23] 陈焕铭, 胡本芙, 余泉茂, 等. FGH95粉末枝晶间合金元素偏析的研究[J]. 材料工程, 2002(3): 32-35.CHEN Huanming, HU Benfu, YU Quanmao, et al. A study of dendrite microsegregations on PREP FGH95 powders[J......
)所示充分混和均匀后,在硅钼棒炉1 450 ℃,保温2 h,充分熔化;将熔体倒入水中进行淬火,获得玻璃态的氟金云母;然后对其进行球磨,过孔径为75 μm筛后备用. 表1 制备氟金云母(FG)的原料及组成 Table 1 Material and composition of prep fluorophlogopite  ......
): 17-20. [6]Zhong T, Hu W. Surface electrochemical control for fine coal and pyrite separation[J]. Proc Annu Coal Prep, 1992, 8: 404-411. [7]Makherjee S, Borthaker P C. Chemical demineralization......
,Twater,TTwater !设定淬火介质水的 温度 *ABBR,Material,TMaterial !设定材料参数 *ABBR,Hxishu,THxishu !输入表面换热系数 *ABBR,Prep,Tprep !建立有限元模型 *ABBR,Tsolve,TTsolve !求解温度场主程序 *ABBR,Tcenter,TTcenter !绘制中心点......
-alloyed powder and pure niobium powder was used as raw material. The alloy powders were prepared by plasma rotating electrode processing (PREP) under the protection of an inert gas with nominal......
pole (PREP) technology, followed by hot isostatic pressing. The chemical composition of the experimental material FGH96 is listed in Table 1. Cylindrical compression specimens with dimensions of d8 mm......
(l): 22-25. LIU Lijun, LIU Jiongtian, SHANG Linping, et al. Stirring on the impact of coal flotation process[J]. Coal Prep Technol, 2009, 37(1): 22-25. [5] 梁华, 徐南喜, 邵燕祥. 薛湖选煤厂浮选工艺优化及搅拌调浆改造[J]. 煤炭工程......
to prepare powders with irregular shapes and a high oxygen content [13]. Compared with the properties of the powders prepared by rotating electrode powder (REP)/plasma rotating electrode powder (PREP... from EIGA and PREP process and mechanical properties of HIPed powder compacts [J]. Acta Metallurgica Sinica (English Letters), 2017, 30(8): 1-10. [16] MI J, FIGLIOLA R S, ANDERSON I E. A numerical......
-ying. The effect of pre-heating on carbide precipitates in FGH95 superalloy powders prepared by PREP[J]. Acta Metallrugica Sinica, 2003, 39(5): 470-450. [13] 周建波, 董建新, 徐志超. 热处理工艺对FGH95合金涡轮盘组织和性能的影响[J......
rotating electrode process (PREP). Alloy powder with particle size of 100-150 μm was filled into steel can and degassed at 400 ℃, then processed by hot isostatic pressing (HIP) at 1200 ℃ for 4 h under......