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

A technology of welding wire and forging billet, which is applied in the field of steel ingot and its smelting, and the preparation of solid welding wire for gas shielded arc welding, which can solve the problems of alloy steel plasticity and toughness decrease and process difficulties

CN105728614AInactive Publication Date: 2016-07-06天津冶金集团天材科技发展有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-07-06
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment Construction

[0092] Below in conjunction with preferred embodiments, the specific implementation, features and effects provided by the present invention are described in detail as follows; for the purpose of simplicity and clarity, the description of known technologies is appropriately omitted below to avoid unnecessary details Affect the description of this technical solution.

[0093] A forging method of 21-10Mn7Mo welding wire and a forging blank prepared by the method. The quoted unit of material composition is mass %. Quantities and value units that are not specifically described are in line with the general regulations and customary usage of the industry, and will not be repeated.

[0094] 1. The forging method of the 21-10Mn7Mo welding wire, wherein the chemical composition mass % of the 21-10Mn7Mo steel ingot should satisfy: carbon C≤0.10, silicon Si≤0.8, manganese Mn5.5-8.0, phosphorus P≤0.030, sulfur S ≤0.020, nickel Ni9.0-11.0, chromium Cr19.0-22.0, molybdenum Mo0.5-2.0, or / an...