Method of producing superhard composite material for cutting tools involves preparing a mixture by mixing powders of cubic boron nitride
	RUDENOK L P; RUMYANTSEV V I; FISHCHEV V N; BULATOV O N
	2023-12-25
专利权人	VIRIAL LLC (VIRI-Non-standard)
申请日期	2023-12-25
专利号	RU2829867-C1
成果简介	NOVELTY - Invention relates to production of a sintered superhard composite material based on cubic boron nitride, intended for making cutting tools. Method of producing the composite material involves preparing a mixture by mixing powders of cubic boron nitride in amount of 55-65 wt.% of the weight of the charge, titanium metal and iodine with a weight ratio of titanium to iodine of 5:1. A titanium layer is deposited on the surface of particles of cubic boron nitride by chemical deposition from a gas phase. When temperature rises at rate of 7.00±0.50 deg/min and holding at final temperature for 120 minutes, a layer of titanium nitrides and borides is formed. Cutting tool workpieces are formed from the obtained powder. Sintering of workpieces is carried out at 1,450±50 °C under pressure 3.8±0.2 GPa for 10 s with simultaneous formation of a binder of titanium nitride and titanium diboride. For the preparation of the mixture and further processing, cubic boron nitride powder of fraction (mcm) 10/5 is used and the process of forming a layer of titanium nitrides and borides on the surface of cubic boron nitride particles is carried out to a final temperature of 725±5 °C, or cubic boron nitride powder of fraction (mcm) 8/4 is used and said process is carried out to final temperature of 710±5 °C, or cubic boron nitride powder of fraction (mcm) 3/1 is used and said process is carried out to a final temperature of 675±5 °C. USE - Various technological processes. ADVANTAGE - Invention enables to obtain a superhard composite material intended for processing hardened steels with hardness of up to 65 HRC, grey and chilled cast irons, hard-to-machine materials and for making wear-resistant structural parts. 1 cl, 6 dwg, 1 tbl, 14 ex
IPC 分类号	B01J-003/06 ; B22F-003/14 ; B23B-027/00 ; C04B-035/5831 ; C04B-035/5835 ; C04B-035/628 ; C04B-035/645 ; C23C-016/06
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/18733
专题	中国科学院新疆生态与地理研究所
作者单位	VIRIAL LLC (VIRI-Non-standard)
推荐引用方式 GB/T 7714	RUDENOK L P,RUMYANTSEV V I,FISHCHEV V N,et al. Method of producing superhard composite material for cutting tools involves preparing a mixture by mixing powders of cubic boron nitride. RU2829867-C1[P]. 2023.

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