Factors Affecting the Temper Embrittlement in HAZ of Cr-Mo Steel
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A new type of temper embrittlement is possible to occur in the HAZ of 1 1/4Cr-1/2Mo steel. The factors influencing this embrittlement would be the tempering- time and temperature, SR-treatment before tempering and the stress during tempering. Those factors were examined using the simulated-HAZ specimen. This specimen (HAZ specimen) was tempered at 773 to 873K for 5 to 2000 hours with and without loading. Charpy impact test was carried out on the tempered specimen. The temper embrittlement occurs most intensively at 823K when the tempering time exceeded 200 hours at 823K. The embrittlement still occurred in the SR-teated specimen when tempering was prolonged. The stress intensified the tendency of embrittlement when tempering time exceeded 200 hours at 823K. SEM observation informed that the embrittlement was caused by the weakening of grain boundary of the prior-austenite.
- Faculty of Engineering, Mie Universityの論文
- 1992-12-21
Faculty of Engineering, Mie University | 論文
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