Abstract��The effect of preliminary treatment temperature on the strength of martensitic stainless strip steel for cryogenic application has been investigated. After the investigation of mechanical properties, metallographic examination, X-ray diffraction, it can be seen that the original structural inheritance occur in the hot rolled steel strip preliminarily treated at temperatures between 750 �� and 850 ��, which lead to an accumulation of defects in the austenite after finally heating for austenitizing. The high density defects in the austenite are inherited by the martensite formed after final solution treatment. The peak strength is present in hot rolled steel strip preliminarily treated at 850 ��, which is attributed to both the defect strengthening in the martensite and less residual austenite in it. In the cold rolled steel, some characteristic temperatures, at which the structural inheritance and recrystallization take place, decrease in consecutive order. For the cold rolled steel strips with 25% and 50% reduction, the strength peaks are achieved after being preliminarily treated at 800 �� and 750 ��, respectively.
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ZHANG Zhi-fang1,WEN Zhi-min2. Effect of Preliminary Treatment Temperature on Strength of Stainless Steel Strip for Cryogenic Application. Chinese Journal of Iron and Steel, 2012, 30(4): 1-4.
2012, Vol. 30 
