Butt-welding large-diameter steel bars |
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| 申请号 | US3618197D | 申请日 | 1969-09-24 | 公开(公告)号 | US3618197A | 公开(公告)日 | 1971-11-09 |
| 申请人 | SUMITOMO METAL IND; | 发明人 | ITO YOSHINORI; | ||||
| 摘要 | A PROCESS FOR BUTT-WELDING LARGE-DIAMETER STEEL BARS HAVING DIAMETERS OF AT LEAST 30 MM., COMPRISING THE STEPS OF APPLYING A SUFFICIENT PRESSURE TO TWO PIECES OF A STEEL BAR IN ABUTTING RELATIONSHIP FOR PRESSURE WELDING, WHILE HEATING THE PARTS TO BE JOINED TO THE WELDING TEMPERATURE WITH A SUFFICIENTLY STRONG REDUCING HYDROCARBON-OXYGEN FLAME FOR DEPOSITION OF CARBON ON THE STEEL SURFACES, SWITCHING THIS REDUCING FLAME OVER TO A NEUTRAL FLAME, AND THEN CONTINUING THE PRESSURE APPLICATION WITH A REDUCED PRESSURE. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
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