Flux-cored wire for repairing hot forging die and using method of flux-cored wire

A technology of flux-cored welding wire and hot forging die, which is applied in welding equipment, welding medium, welding equipment, etc., can solve the problems of difficulty in realizing all-position welding, the service life of hot forging die is not very high, and the service life of hot forging die is short. , to achieve the effects of excellent welding processability, high deposition efficiency and improved production efficiency

CN113210930AActive Publication Date: 2021-08-06泰安市瑞朗科技有限公司 +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-08-06

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Abstract

The invention provides a flux-cored wire for repairing a hot forging die and a using method of the flux-cored wire. The flux-cored wire comprises an alloy steel strip outer skin and flux-cored powder; the alloy steel strip outer skin is prepared from the components including, by mass, 0.20%-0.29% of C, 0.60%-0.70% of Si, 0.5%-0.8% of Mn, less than or equal to 0.01% of S, less than or equal to 0.015% of P, 12%-13% of Cr, 2%-3% of Ni, 4.0%-4.9% of Mo, 0.3%-0.5% of V and the balance Fe; the flux core powder is prepared from the components including, by mass, 55%-60% of rutile, 3%-5% of sodium fluoride, 1%-2% of magnetite, 3%-5% of potassium cryolite, 5%-8% of zircon sand, 4%-7% of potassium titanate, 2%-3% of cerium oxide and the balance Fe. According to the flux-cored wire, main alloy elements are transited through the alloy steel strip outer skin, the transition rate of the alloy elements is increased, so that surfacing metal has good abrasion resistance and impact toughness, and the service life of the hot forging die is prolonged.
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Description

Technical field

[0001] The invention belongs to the technical field of welding materials, and in particular relates to a flux-cored welding wire for repairing a hot forging die and a using method thereof.

Background technique

[0002] The hot forging die is the die used in the production of "die forging" in the hot forging manufacturing process. The common material of the hot forging die is hot forging die steel (such as 5CrMnMo), which is a kind of air-cooled hardening die steel widely used at home and abroad. It has high toughness and resistance to cold and heat fatigue, and is not easy to produce thermal fatigue cracks. It can be used as a die-casting mold and a hot forging mold. It is a kind of steel with high quality and low price. Due to the repeated heating and cooling of the hot forging die, and under the condition of high unit pressure and impact, the surface will be damaged after working for a period of time (usually a set of new dies will have problems with ab...

Examples

Embodiment Construction

[0020] In order to make the object, technical solution and advantages of the present invention clearer, the present invention is described with the following specific examples, but it is by no means limited thereto. The following description is a preferred embodiment of the present invention, which is only used to describe the present invention, and should not be construed as a limitation of the present invention. It should be pointed out that any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention , should be included within the protection scope of the present invention.

[0021] The effect and content of each component in the alloy steel strip sheath of the flux-cored welding wire prepared in the embodiment of the present application are as follows:

[0022] C is the main element to improve the strength and hardness of the weld metal. When the C content is too low, the strength and hardness of the deposited m...