A kind of method for manufacturing steel rail and steel rail using nano-bainite material containing rare earth la element
A technology of nano-bainite and bainite, which is applied in the direction of manufacturing tools, furnace types, furnaces, etc., can solve the difficulty of matching the strength, toughness, and extensibility of bainite rails at the same time, and the manufacturing and processing of rails. Restrict the popularization and application of bainite rails, etc., to achieve the effect of economical and recyclable, convenient for large-scale production, and save the heat treatment process
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[0043] Another aspect of the present invention provides a method for preparing a nano-bainite rail containing rare earth La element, comprising the following steps:
[0044] The smelting step: specifically includes: 1) deoxidation and desulfurization step, deoxidation and desulfurization of the material matrix, so as to obtain a pure material structure; 2) element addition step, in the pure material structure, the added elements and content weight percentage They are: carbon C: 0.18%-0.30%, manganese Mn: 1.4%-1.8%, silicon Si: 0.8%-1.0%, chromium Cr≤1.0%, molybdenum Mo: 0.25-0.32%, lanthanum La: 0.0050%- 0.015%, the rest is iron Fe and impurities, satisfying the relationship: 3.0%≤Mn+Si+Cr+Mo≤3.82%; 3) refining step, after adding alloy elements, enter the LF furnace (LADLE FURNACE, ladle refining furnace) for refining, After adding different contents of rare earth La, VD furnace (Vacuum Degassing, vacuum degassing furnace) is used for vacuum degassing treatment, and then conti...
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