Producing powder hard magnetic alloy of iron-chromium-cobalt system, by e.g. carrying out pressing and sintering in two stages, carrying out preliminary pressing out with specific pressure, and carrying out preliminary sintering in vacuum
	KOZVONIN V A; KORSUN YU V; MARIEVA M A; SHACOV A A
	2023-05-25
专利权人	PERM SCI-PRODN INSTR-MAKING CO (PRSC-Non-standard)
申请日期	2023-05-25
专利号	RU2023107329-A
成果简介	NOVELTY - Producing a powder hard magnetic alloy of the iron-chromium-cobalt system, includes carrying out pressing and sintering in two stages, alternating operations, and carrying out preliminary pressing out with a pressure of 26-32 tons/cm2, carrying out preliminary sintering in a vacuum with a residual pressure of ≯ 10-2Pa at a temperature of 820-860° C for 2-4 hours, carrying out final pressing with a pressure of 33-38 tons/cm2, carrying out final sintering in a vacuum at temperatures of 1350-1360° C for 2-4 hours, carrying out homogenizing, annealing at a temperature from 1200-1300° C with a holding time of 15-20 hours and cooling together with cooling the furnace in a vacuum to room temperature, hardening at 1300-1350° C with a holding time of 1-1.5 hours with cooling in water and multi-stage aging with the application of an external magnetic field in the temperature of 670-525° C with a holding time of 20-30 minutes at each stage, with air cooling after each stage. USE - The method is useful for producing a powder hard magnetic alloy of the iron-chromium-cobalt system. ADVANTAGE - None given. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for powder hard magnetic alloy obtained by the method and containing 20-25 wt.% chromium, 14-16 wt.% cobalt, 3-4 wt.% molybdenum, 0.5-1.5 wt.% silicon, 1.4-4.5 wt.% KS25DC (samarium, cobalt, iron, zirconium, and copper), the rest is iron and inevitable impurities in the form of compounds of nickel, manganese, copper, aluminum, calcium, zirconium, tungsten, carbon, oxygen, phosphorus and sulfur, where it is additionally alloyed with a rare earth alloy KS25DC (samarium, cobalt, iron, zirconium, and copper).
IPC 分类号	B22F-003/16 ; B22F-003/24 ; C22C-033/02 ; C22C-038/30 ; H01F-001/053 ; H01F-001/08
国家	俄罗斯
专业领域	材料科学
语种	英语
成果类型	专利
文献类型	科技成果
条目标识符	http://119.78.100.226:8889/handle/3KE4DYBR/21778
专题	中国科学院新疆生态与地理研究所
作者单位	PERM SCI-PRODN INSTR-MAKING CO (PRSC-Non-standard)
推荐引用方式 GB/T 7714	KOZVONIN V A,KORSUN YU V,MARIEVA M A,et al. Producing powder hard magnetic alloy of iron-chromium-cobalt system, by e.g. carrying out pressing and sintering in two stages, carrying out preliminary pressing out with specific pressure, and carrying out preliminary sintering in vacuum. RU2023107329-A[P]. 2023.

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