ZINC-COATED STEEL HAVING REDUCED SUSCEPTIBILITY FOR LIQUID METAL EMBRITTLEMENT (LME)

摘要

A method of manufacturing zinc-coated steel having a reduced susceptibility to liquid metal embrittlement (LME) according to various aspects of the present disclosure includes providing a steel substrate including iron, carbon in amount ranging from about 0.01-0.45 weight percent, chromium in an amount ranging from about 0.5-5 weight percent, and silicon in an amount ranging from about 0.5-2.5 weight percent. The method includes forming an oxide-containing layer on a surface of the steel substrate by annealing the steel substrate in an oxygen-containing atmosphere. The method further coating a zinc layer on the oxide-containing layer by a spray coating process. In certain aspects, the present disclosure also provides a method of forming an assembly having a reduced susceptibility to LME via resistance spot welding. The present disclosure also provides, in various aspects, a zinc-coated steel component including a steel substrate, an oxide-containing layer, and a zinc layer.