发明名称 |
Method of increasing the yield strength of cold formed steel sections. |
摘要 |
PCT No. PCT/AU95/00378 Sec. 371 Date Dec. 26, 1996 Sec. 102(e) Date Dec. 26, 1996 PCT Filed Jun. 27, 1995 PCT Pub. No. WO96/00305 PCT Pub. Date Jan. 4, 1996Yield strength of a cold rolled steel section is increased and controlled by performing a predetermined amount of strain by way of cold working in an in-line roll forming process followed by a controlled amount of strain aging wherein the temperature of the steel section is elevated to a point below 500 DEG C. and held at an elevated temperature for a time up to 30 seconds. The heating typically takes place by induction heaters (16) and the time aging may be provided in an in-line galvanizing bath (17) before cooling the steel in a quench bath (18). The effect is further enhanced by further cold working and the consequent additional strain in forming rolls (19). For a given steel composition the degree of yield enhancement can be controlled by the temperature and tie parameters and also by the degree of initial roll forming in shaping rolls (10). |
申请公布号 |
ZA9505322(B) |
申请公布日期 |
1998.06.29 |
申请号 |
ZA19950005322 |
申请日期 |
1995.06.27 |
申请人 |
TUBEMAKERS OF AUSTRALIA LIMITED |
发明人 |
LEIGH BRIAN DALEY;BRIAN ROY CROSSINGHAM;TREVOR MAXWELL HEIGHT;ANDREW STYAN |
分类号 |
C21D8/10;C21D1/26;C21D8/00;C21D9/00;C21D9/08 |
主分类号 |
C21D8/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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