Casting steel containing rare earth element and protuction process thereof

Abstract

The present invention relates to one kind of RE element containing cast steel, which consists of chemically C 0.24-0.32 wt%, Si 1.0-1.6 wt%, Mn 1.0-1.6 wt%, Cr 0.2-0.5 wt%, RE 0.02-0.10 wt%, Ni not more than 0.05 wt%, Mo not more than 0.01 wt%, P not more than 0.03 wt%, S not more than 0.03 wt%, B not more than 0.003 wt%, and Fe and inevitable impurity for the rest. its production process includes charge lowering, smelting in an electric furnace, deoxidizing, eliminating slag, adding RE alloy elements, heating and stirring, letting stand and eliminating slag, casting, and quenching-tempering heat treatment. The RE element containing cast steel has relatively low cost, and capacity of casting product with high quality and mechanical performance.

Description

technical field [0001] The invention relates to a cast steel containing rare earth elements. Background technique [0002] Existing alloy cast steel, such as cast steel with steel grades 20CrMo, 35CrMo, 42CrMo in the Chinese JB / ZQ4297 alloy cast steel standard, cast steel with steel grade GS-42CrMo4 in the German DIN 17205 standard, American ASTM standard A148 / A148M - In 1998, 115-95, 130-115, 135-125, 150-135 and other structural high-strength cast steels were added with precious metal elements such as chromium, nickel, and molybdenum to achieve certain quality and mechanical properties. Among them, The contents of chromium, nickel and molybdenum are respectively 0.4-1.2wt%, 0.4-0.7wt% and 0.15-0.3wt%. In the past two years, due to the soaring price of alloys in the world, the cost of steel castings has increased significantly, resulting in a decline in profits and even losses for suppliers. Therefore, under the premise of ensuring the quality and mechanical properties of...

AI Technical Summary

Problems solved by technology

In this method, the rare earth alloy and molten steel cannot be effectively mixed evenly, and slag will be generated after adding the rare earth alloy, which cannot be removed, thus affecting the quality and mechanical properties of the final cast steel product

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