| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: invention relates to metallurgy. Consumable pattern surface is coated by paste pre-diluted in fluid and containing the following components in wt %: chromium diboride - 10-40; boron carbide - 35-80; fine graphite - 7-18; sodium fluoride - 1-5; ammonium chloride - 1-3. Said coat is dried in air unless solid crust. Dried consumable pattern is formed in specially shaped moulding box to be filled with day quartz sand, melt is teemed to produce casting with diffusion layer. ^ EFFECT: accurate sizes, higher wear and rust resistance, decreased surface roughness. ^ 1 cl, 1 tbl, 1 ex |
