| 摘要 |
<p>1282639 Hard facing alloy BORG-WARNER CORP 3 Oct 1969 [29 Nov 1968) 48816/69 Headings C7A and C7F A hard facing alloy containing in weight per cent 1-3C, 13-17Cr, 3-7Ni, 2À25-7SiO 2 , 0À2-0À5Mn, 2-4B and 65-75Fe is mixed with a flux e.g. 3% potassium borate and a liquid vehicle e.g. 8-15% water. The slurry is applied to a substrate e. g. tillage discs and fused to form a coating 0À01-0À045 inches thick with a Rockwell C hardness of 72. The powder alloy preferably has a maximum size of 100 US mesh and 1% bentonite clay may be added to the suspension.</p> |
