发明名称 |
Surface treatment of austenitic ni-fe-cr-based alloys for improved resistance tointergranular-corrosion and -cracking |
摘要 |
A surface treatment process for enhancing the intergranular corrosion and intergranular cracking resistance of components fabricated from austenitic Ni-Fe-Cr based alloys comprised of the application of surface cold work to a depth in the range of 0.01 mm to 0.5 mm, for example by high intensity shot peening, followed by recrystallization heat treatment preferably at solutionizing temperatures (>900 C.). The surface cold work and annealing process can be repeated to further optimize the microstructure of the near-surface region. Following the final heat treatment, the process can optionally comprise the application of surface cold work of reduced intensity, yielding a cold worked depth of 0.005 mm to 0.01 mm, in order further enhance resistance to cracking by rendering the near surface in residual compression. |
申请公布号 |
AU6198001(A) |
申请公布日期 |
2001.12.03 |
申请号 |
AU20010061980 |
申请日期 |
2001.05.24 |
申请人 |
INTEGRAN TECHNOLOGIES INC. |
发明人 |
DAVID L. LIMOGES;GINO PALUMBO;PETER K. LIN |
分类号 |
C21D7/06;C21D9/50;C22F1/10;C22F3/00 |
主分类号 |
C21D7/06 |
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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