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Micro slag gas protection flux-cored wire suitable for electric arc additive manufacturing of die

A technology of additive manufacturing and flux-cored welding wire, which is applied in the direction of arc welding equipment, manufacturing tools, welding media, etc., can solve problems such as slag removal, and achieve good forming effects

Active Publication Date: 2016-11-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a micro-slag gas shielded flux-cored welding wire suitable for mold arc additive manufacturing, solve the problem of slag removal during the welding process of mold arc additive manufacturing, and realize The continuity of the welding process, and ensure the good welding performance of the welding wire and the good mechanical properties of the deposited metal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A micro-slag gas-shielded flux-cored welding wire suitable for mold arc additive manufacturing. It uses H08A steel strip to wrap the powder core, and the product is made through the flux-cored welding wire manufacturing process. The powder core includes component A, component B and component C. Component A includes: rutile: 32%, cryolite (fluoride): 6%, fluorite: 12%, marble: 10%, magnesium Sand: 12%, potassium titanate: 10%, albite: 18%; component B includes: aluminum-magnesium alloy: 6%, ferro-titanium: 6%, metallic nickel: 28%, metallic molybdenum: 10% %, metal chromium: 12%, 45# ferrosilicon: 14%, metal manganese: 24%; component C is iron powder and unavoidable impurities, component A accounts for 3.8% of the total weight of the powder core, component B and The weight ratio of component C is 38:100, the powder core filling rate is 26%, and the mass percentage range of the steel strip is as follows: C: 0.01-0.02%, Mn: 0.20-0.25%, Si≤0.11%, S<0.011% , P<0.008%, and t...

Embodiment 2

[0026] A micro-slag gas-shielded flux-cored welding wire suitable for mold arc additive manufacturing. It uses H08A steel strip to wrap the powder core, and the product is made through the flux-cored welding wire manufacturing process. The powder core includes three parts: component A, component B and component C. Component A includes: rutile: 30%, cryolite (fluoride): 5%, fluorite: 10%, marble: 14% , magnesia: 10%, potassium titanate: 13%, albite: 18%; component B includes: aluminum-magnesium alloy: 10%, titanium iron: 6%, metal nickel: 26%, metal molybdenum : 10%, metal chromium: 12%, 45# ferrosilicon: 17%, metal manganese: 19%; component C is iron powder and unavoidable impurities, component A accounts for 5.0% of the total weight of the powder core, component The weight ratio of B to component C is 40:100, the powder core filling rate is 27%, and the mass percentage range of the steel strip is as follows: C: 0.01-0.02%, Mn: 0.20-0.25%, Si≤0.11%, S< 0.011%, P<0.008%, the b...

Embodiment 3

[0029] A micro-slag gas-shielded flux-cored welding wire suitable for mold arc additive manufacturing. It uses H08A steel strip to wrap the powder core, and the product is made through the flux-cored welding wire manufacturing process. The powder core includes three parts: component A, component B and component C. Component A includes: rutile: 40%, cryolite (fluoride): 4%, fluorite: 8%, marble: 12% , magnesia: 8%, potassium titanate: 11%, albite: 17%; component B includes: aluminum-magnesium alloy: 12%, titanium iron: 6%, metal nickel: 26%, metal molybdenum : 14%, metal chromium: 12%, 45# ferrosilicon: 10%, metal manganese: 20%; component C is iron powder and unavoidable impurities, component A accounts for 4.4% of the total weight of the powder core, component The weight ratio of B to component C is 42:100, the powder core filling rate is 25%, and the mass percentage range of the steel strip is as follows: C: 0.01-0.02%, Mn: 0.20-0.25%, Si≤0.11%, S< 0.011%, P<0.008%, the bal...

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Abstract

The invention relates to a micro slag gas protection flux-cored wire suitable for electric arc additive manufacturing of a die. The flux-cored wire is formed by wrapping a powder core with a steel strip and comprises a component A, a component B and a component C. The component A comprises, by weight, 30-45% of rutile, 4-7% of cryolite, 8-14% of fluorite, 10-20% of marble, 8-14% of magnesite, 8-14% of potassium titanate and 10-22% of albite. The component B comprises, by weight, 5-20% of aluminum magnesium alloy, 5-15% of ferrotitanium, 26-40% of nickel, 8-20% of molybdenum, 12-24% of chrome, 10-18% of 45# silicon iron and 10-28% of manganese. The component C is composed of iron powder and impurities. After the flux-cored wire is welded, a micro amount of molten slag is formed and thinly and uniformly covers the surface of deposited metal, the molten slag cocks and falls off automatically after cooling, and multilayer welding can be achieved without slag removing; and in addition, weld spatter hardly appears, electric arcs are stable, molten metal does not flow, the appearance is attractive, excellent welding technological performance is achieved, and the deposited metal has good comprehensive mechanical performance.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a micro-slag gas-shielded flux-cored welding wire suitable for the arc additive manufacturing of molds. Background technique [0002] Molds are a type of key spare parts that consume a lot in the forging industry. They are subject to high cyclic loads for a long time, and are prone to failure and scrapping. The length of the service life of the mold directly affects the production efficiency, the quality of the parts and the production cost. At present, manual arc surfacing is generally used to repair the failed mold, which can effectively prolong the service life. However, manual surfacing welding cannot be automatically and continuously surfacing, and the work efficiency is low, the labor intensity is high, the working environment is harsh, and the welding quality is greatly affected by human factors. With the development of additive manufacturing technology, the us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/02B23K35/30B23K9/16B23K9/04
CPCB23K9/04B23K9/16B23K35/0266B23K35/3033
Inventor 刘仁培常超沈泳华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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