FIELD: tool working. SUBSTANCE: tool is pressed in mixture of powders containing, wt. -% : boron 40- 50; titanium 30-40; aluminium oxide 15-20; ammonium fluoride - below 5. Working is carried out for two stages - firstly at 980 C for 2-2.5 h and then - 1000 C for 2-2.5 h under vacuum. EFFECT: improved method of working. 1 tbl, 2 dwg
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