Forging method for producing 21-10Mn7Mo welding wire and blank forged by same

Abstract

A forging method for producing a 21-10Mn7Mo welding wire and a blank forged by the method belong to the technical field of welding, relate to the production of a solid welding wire used for gas-shielded arc welding, a forging method, a component forged by the method and a hot-rolling technology and further relate to a steel ingot and the smelting thereof. The forged blank comprises the following chemical components in a percent by mass: smaller than or equal to 0.10 of C, smaller than or equal to 0.8 of Si, 5.5-8.0 of Mn, smaller than or equal to 0.030 of P, smaller than or equal to 0.020 of S, 9.0-11.0 of Ni, 19.0-22.0 of Cr and 0.5-2.0 of Mo, wherein the ratio of Mn to Mo is controlled between 7 and 7.5. The forging step adopted for producing the forged blank comprises the step of heating a blank, and forging temperature is controlled in a way that initial forging temperature is higher than or equal to 1180 DEG C and final forging temperature is higher than or equal to 850 DEG C. The smelting step of a forged steel ingot comprises the technical step of using an electric-arc furnace return oxygen blowing process to smelt an electroslag re-melted electrode.

Description

technical field [0001] This case belongs to the field of welding technology, and involves the preparation method of solid wire for gas-shielded arc welding, its intermediate and finished products, and its process equipment. It involves a forging method and its forged parts, as well as a hot rolling process, and also involves a steel ingot and its smelting. Background technique [0002] Stainless steel welding wire and welding rod are used more and more in automation technology, but the common quality problems of stainless steel welding wire prepared by existing technologies are that the appearance of the welding wire is not good, and the wire feeding is not stable enough, so it is difficult to meet the requirements of high-automation welding equipment. [0003] It is generally known that the quality of welding wire is closely related to the subtle changes in chemical composition caused by steelmaking, and has a close relationship with the impurity content of material compone...

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Problems solved by technology

[0014] The welding wire in this case is an innovation based on the existing H1Cr21Ni10Mn6 welding wire, including adding an appropriate amount of Mo and increasing the content of Mn correspondingly. The problem is that the change of the material composition will bring technical difficulties to the later production. It is generally known that, When the content of molybdenum in alloy steel is within a certain range, molybdenum will reduce the plasticity and toughness of alloy steel, so the industry urgently needs to solve such problems by improving the process methods including forging

[0015] Due to the components of the welding wire, the preparation method of the welding wire and the process equipment, the existing technology cannot well overcome the above problems

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