在汽车上,如曲轴等结构件需要钢材具备一定的淬透性,以保证通过淬火获得良好的力学性能。因此,往往采用保证淬透性结构钢制造。原规定热轧和热锻的保证淬透性结构钢技术条件的国家标准G B/T 5216—1985《保证淬透性结构钢技术条件》于2004年被首次修订,修订后的新标准于2004年1 In the car, such as crankshaft and other structural parts require steel with a certain degree of hardenability, to ensure good mechanical properties through quenching. Therefore, it is often used to ensure the hardenability of structural steel. The original provisions of hot-rolled and hot forging to ensure that the hardenability of structural steel technical conditions of the national standard GB / T 5216-1985 “guaranteed hardenability structural steel technical conditions” was first revised in 2004, the revised new standard in 2004 1