SR Embrittlement and Temper Embrittlement Observed in HAZ of 2 1/4Cr-1Mo Steel
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The temper embrittlement of HAZ of 2 1/4Cr-1Mo steel was studied in the tempering temperature - time range of 775 to 975K and 0.2 to 10000 hours. The changes of transition temperature and fracture mode informed that there were five types of temper embrittlement. The fifth type of temper embrittlement arose in the temperature range higher than 950K and the other four types did in the temperature range lower than 900K. The first and second types arose in the earlier tempering stages, such as the tempering time shorter than 100hr at 825K. The third and fourth types were observed in the later tempering stages, such as the tempering times longer than 100hr and 1000hr, respectively at 825K. The third type exhibited the fracture mode of intergranular, but other four types did that of transgranular. The third type and fifth type will be identical with the reversible temper embrittlement and SR embrittlement. Little attention has been paid on the embrittlement of the types of first, second and fourth, and hence little is known on the characteristics of those types of emnrittlement.
- Faculty of Engineering, Mie Universityの論文
- 1995-12-21
Faculty of Engineering, Mie University | 論文
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