STAINLESS STEEL COMPOSITE PLATE FOR USE IN PETROLEUM AND NATURAL GAS DELIVERY PIPELINES AND PREPARATION METHOD THEREFOR

摘要

A stainless steel composite plate for use in petroleum and natural gas delivery pipelines, comprising a base material and a coating material, the coating material being metallurgically coated onto the base material, the coating material being austenitic stainless steel, and the chemical composition of the base material by weight percentage being: C: 0.03％-0.09％, Si: 0.2％-0.4％, Mn: 1.00％-1.70％, P≤0.02％, S≤0.01％, Alt: 0.015％-0.050％, Nb: 0.020％-0.090％, V≤0.05％, Ti: 0.006％-0.030％, Cr: 0.10％-0.30％, Ni≤0.30％, Mo≤0.10％, Cu≤0.30％, B≤0.001％, and the remainder being Fe and a small amount of unavoidable impurities; and a preparation method for the stainless steel composite plate for use in petroleum and natural gas delivery pipelines, the preparation method being simple and easy to implement and low cost; the prepared composite plate has good corrosion resistance and strong toughness, a straighter composite interface, more uniform coating thickness, and better surface quality, and can be directly used without needing annealing heat treatment.