Method for manufacturing compacted tubes and rods |
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| 申请号 | US3629929D | 申请日 | 1969-07-03 | 公开(公告)号 | US3629929A | 公开(公告)日 | 1971-12-28 |
| 申请人 | MANNESMANN AG; | 发明人 | WESSEL OTTO; | ||||
| 摘要 | The disclosure relates to utilization of metallic shavings, usually regarded as waste. The shavings are compressed to billets and extruded. Prior to extrusion the shavings and/or the billets may be annealed. To control composition the shavings may be mixed with particular powder at selected ratios prior to compression. | ||||||
| 权利要求 | 2. The method as set forth in claim 1, including the steps of providing a metal powder having composition different from the shavings, and mixing powder and shavings at a particular selected ratio to control composition of the extruded workpiece. 3. A method as set forth in claim 1, and including the step, preceding the compressing of the shavings, of cleaning the shavings. 4. A method as set forth in claim 3, the cleaning step including subjecting the shavings to a degreasing liquid. 5. A method as set forth in claim 1, the shavings being provided from materials of different composition. 6. A method as set forth in claim 1, and including the step of mixing different metal powders with the shavings. 7. A method as set forth in claim 1 and including the step of mixing the shavings with wire cuttings. 8. A method as set forth in claim 7, the wire cuttings originating from wires of different material. 9. The method as set forth in claim 1 and including the step of mixing the shavings with a metal powder, the metal powder constituting up to 80 percent of the mixture. 10. The method as set forth in claim 9 and including the step of heat treating the shavings while exposed to air prior to mixing with powder. 11. A method as set forth in claim 1 and including the additional step of oxidizingly annealing the shavings prior to compressing. 12. A method as set forth in claim 1 and including the step of mixing the shavings prior to compressing with metal powder in a relationship of 20 to 60 percent metal powder. 13. Method as in claim 1, the providing step comprising the providing of chromium nickel steel shavings, and annealing the shavings at a temperature of about 800* to 1,000* C. prior to compression, to obtain oxide coating on the shavings. 14. Method as in claim 13, including mixing the annealed shavings with a steel powder of differing chromium nickel content. |
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