High-strength high-toughness non-quenched and tempered front axle steel and production method thereof
A high-strength, high-toughness, production method technology, applied in the field of high-strength and high-toughness non-quenched and tempered front axle steel, can solve the problems of uneven growth of the billet shell, sensitive to steel cracks, slag inclusion defects, etc., and achieves simple production operation and excellent low temperature. The effect of toughness and good surface quality
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[0037]Example 1-8: The chemical composition and production method of the high-strength, high-toughness, non-quenched and tempered front axle steel are as follows.
[0038](1) Converter smelting process: calculated based on alloy recarburization 0.03wt%, refining recarburization 0.03wt%, continuous casting recarburization 0.01wt%, control endpoint C≤0.07wt%, endpoint P≤0.015wt%, endpoint temperature ≥1620℃; According to the composition target, the tapping compound gold (ferrosilicon, low manganese, low chromium) is controlled at 2.5-3.5t. Steel tapping plus white ash 200~400Kg / furnace, pre-melted slag 200~400Kg / furnace; front slag stop tapping, steel tapping plus steel core aluminum 100~200Kg / furnace The specific process of the converter smelting process in each embodiment is shown in Table 1.
[0039]Table 1: Converter smelting process of each example
[0040]
[0041](2) Refining process: adding silicon carbide diffusion deoxidation in batches during the refining process, deoxidizing slag with...
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