| A study was conducted to investigate the effect, of cold rolling and electron beam welding on microstructures and mechanical properties in C250 and T250 maraging steels. Microstructures of cold rolled specimen performed intermediate solution treatment(850℃, 1hr)were finer than those of directly cold rolled specimen due to recrystallization during solution treatment. Even though the hardness distribution trends of both C250 and T250 cold rolled maraging steels after electron beam welding were nearly the same, the restoration trends of hardness on welded zone after aging treatment were different were different between those two maraging steels. The segregation of Ni, Mo, Ti elements on welded zone in T250 maraging steel was severer than that in C250 maraging steel, which resulted in poor hardness restoration in T250 maraging steel. |
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