Free-cutting water-atomized steel powder and preparation method thereof
A steel powder and manufacturing method technology, applied in the field of powder metallurgy, can solve problems such as uneven mixing of components, easily damaged cutter heads, and poor cutting performance of sintered products, and achieve the effects of low cost, high production efficiency, and improved life
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[0012] The specific embodiments of the present invention will be further described below in conjunction with the drawings:
[0013] The manufacturing method of free-cutting water atomized iron and steel powder includes smelting, water atomization, and reduction. The content of S in iron and steel powder is controlled by adding high-sulfur ferroalloy. The operation steps are as follows:
[0014] 1) Smelting, smelting the scrap steel with an electric furnace to obtain molten steel with uniform and stable composition and less impurities. At a temperature of 1690±20℃, add a high-sulfur ferroalloy with a S content of 50-85% to the molten steel in an amount of 10~ 15kg / ton, particle size 20-80 mesh, stir until uniform.
[0015] 2) Water atomization process parameters, molten steel tapping temperature 1750±10℃, atomization start temperature 1680±10℃, atomization termination temperature 1650±5℃, molten steel flow diameter 30~35mm, molten steel atomization Speed 3.1~3.8kg / s, high pressure ...
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