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《Heat Treatment of Metals》 1990-01
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Failure mechanism of Hot Pressing Dies arid Heat Treatment

He Shiyu;Zhang Yulan;Feng Xiaozeng;Zhang Defu;Gao Shushan;Li Yimin  
This paper deals with the relation between the failure mechanismof hot pressing dies and the mechanical properties of the tool steels.It showsthat the main service properties of the tool steels for hot pressing dies arehigh temperature strength,resistance to hot fatigue,fracture toughness,andfatigue crack growth rate.The impact toughness is less important than formerones.The service properties of the tool steel 3Cr2W8V can be improved byelevating the temperature of quenching and tempering,therefore,the servicelife may be prolonged.This result is also reference for hot pressing dies madeof other high alloy tool steels.
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