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本文研究了形变热处理对00Cr16Ni6Mo3Cu1(A钢)马氏体时效不锈钢及00Cr26Ni6Mo4Cu1Ti(B钢)奥氏体—铁素体双相不锈钢的力学性能及耐孔蚀性的影响,得到以下结论,(1)形变热处理提高了实验钢的抗张强度和屈服强度,在同一形变温度下,形变量越大,强度提高越多,而塑性略有下降。当形变量>50％时,材料发生脆性断裂。(2)当形变量<50％时,形变热处理对材料的耐孔蚀性影响不大。(3)A钢强化的主要原因是形变使马氏体内位错密度增加,马氏体板条碎化以及马氏体内亚结构的形成。(4)A钢在750℃,X％形变及B钢在750℃,Y_1～Y_2％形变后,力学性能及耐孔蚀性能达“七五”攻关指标要求。
In this paper, the mechanical properties and pitting corrosion resistance of 00Cr16Ni6Mo3Cu1 (A steel) martensite-aged stainless steel and 00Cr26Ni6Mo4Cu1Ti (B steel) austenite-ferritic duplex stainless steel were studied. The conclusions are as follows: (1) The deformation heat treatment increases the tensile strength and yield strength of the experimental steel. At the same deformation temperature, the greater the deformation, the more the strength increases, while the plasticity decreases slightly. When the deformation amount> 50%, the material brittle fracture occurs. (2) When the deformation is less than 50%, the deformation heat treatment has little effect on the corrosion resistance of the material. (3) The main reason for the strengthening of A steel is that the deformation causes the increase of dislocation density in martensite, the reduction of martensite lath and the formation of sub-structure in martensite. (4) The mechanical properties and pitting corrosion resistance of A steel reach the requirements of the “Seventh Five-Year Plan” after being deformed at 750 ℃, X% and B steel at 750 ℃ and Y_1 ~ Y_2%.