Method for improving aldrin impact of martensitic stainless steel bar

The invention discloses a method for improving the aldrin impact of a martensitic stainless steel bar. The method comprises the following steps of putting a sample of a cylindrical long bar into a stainless steel sleeve, and putting the stainless steel sleeve into a quenching furnace for first heat preservation; placing the sample subjected to primary heat preservation and cooling in a tempering furnace for secondary heat preservation; and carrying out finish machining on the sample subjected to secondary heat preservation and cooling to obtain a tensile sample and an aldrin impact sample. According to the treatment method for the martensitic stainless steel bar provided by the embodiment of the invention, the amount of austenite and the twin substructure in lath martensite are improved, the aldrin impact level of the bar is improved, and the percent of pass is 100%. 本发明公开了一种用于改善马氏体不锈钢棒材艾氏冲击的方法，包括步骤：将圆柱形长棒的试样放入不锈钢套管，并放置于淬火炉中进行第一次保温；将第一次保温冷却后的试样放置于回火炉中进行第二次保温；对第二次保温冷却后的试样进行精加工，得到拉伸试样和艾氏冲击试样。本发明实施例提供的用于马氏体不锈钢棒料