High dimensional stability and corrosion resistant martensitic steel material production method

The present invention discloses a high dimensional stability and corrosion resistant martensitic steel material preparation method, chemical composition by percentage weight: C≤0.10; Cr: 14.0 ~ 15.5; Ni: 4.2 ~ 6.0; Cu : 2.0 ~ 3.5; Nb: 0.2 ~ 0.40; Mn≤0.7; Mo: 0.3 ~ 0.8; Si≤1.0; P≤0.02; S≤0.015; balance being Fe. The method of preparing the above steel material, comprising the following steps: 1) by weight percentage of each chemical component of each component weighed; 2), vacuum induction melting 3), pouring remelting electrode rod; 4), electroslag remelting obtained ingot; 5), homogenization heat treatment; 6), forging the blank wire rod, sheet metal strip; 7), wire rod, sheet metal strip blank finishing, testing, cold. The present invention is achieved by a low carbon lath martensite formation and high toughness alloy elements molybdenum, copper or the like supplemented enhancement means to obtain high strength and toughness, high corrosion and wear resistance, corrosion resistance to meet strong resistance good wear properties, good machinability, dimensional stability, and other requirements ferromagnetic.