发明名称 |
Process for thermodynamically treating a region joining two members |
摘要 |
This invention relates to a process for thermodynamically treating a region joining two members. In accordance with one aspect of the present invention, are the steps of heating the region to a first temperature generally within a range of 750 DEG F. and 850 DEG F. so as to diffuse a strengthening material in the region into a heat affected zone between the members; maintaining the first temperature for a first selected time within a range of 3 to 20 hours so as to raise the percentage of strengthening material diffusing into the heat affected zone; heating the region to a second temperature generally within a range of 900 DEG F. to 1000 DEG F. so as to initiate hardening of the heat affected zone; maintaining the second temperature for a second selected time generally within a range of 0.5 to 5 hours so as to harden the heat affected zone with minimal decrease in hardening of regions outside the heat affected zone; and cooling the region to room temperature. This invention also relates to a composition of a region joining two members treated thermodynamically by a process set forth by the present invention. In accordance with one aspect of the present invention, there is provided a region comprising a solidified bead containing generally between 1.6 and 2.0% beryllium, a melt and mix zone containing generally between 0.6 and 1.8% beryllium, a recrystallized zone containing generally between 0.6 and 1.0% beryllium, and an overaged zone containing generally between 0.3 and 0.8% beryllium.
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申请公布号 |
US5217158(A) |
申请公布日期 |
1993.06.08 |
申请号 |
US19920914204 |
申请日期 |
1992.07.14 |
申请人 |
BRUSH WELLMAN, INC. |
发明人 |
SPIEGELBERG, WILLIAM D.;RATKA, JOHN O.;LORENZ, CLARENCE S. |
分类号 |
B23K31/02;C21D6/02;C21D9/50;C22F1/08 |
主分类号 |
B23K31/02 |
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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