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Ni-Cr-based alloy welding wire and preparation method thereof

A base alloy, ni-cr technology, applied in welding equipment, metal processing equipment, welding medium, etc., can solve the problems of difficult production of fine alloy welding wire, complicated production equipment, long process flow, etc., and achieve no work hardening and raw material utilization The effect of high rate and uniform dispersion

Inactive Publication Date: 2019-08-23
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to propose a powder metallurgy method to solve the problems of complex production equipment, large cost investment, long process flow, and difficulty in producing thin alloy welding wire with a diameter of less than 2mm in the traditional drawing method to produce welding wire. Production method for preparing Ni-Cr base superalloy welding wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of Ni-Cr base alloy welding wire, its preparation process is, the mass fraction is the Ni powder of 64wt%, the Cr powder of 20wt%, the Fe powder of 8wt%, the B powder of 8wt% add the PVA solution of total metal mass 20wt% , the PVA mass fraction that contains in the PVA solution of configuration is 15wt%, is placed in kneader and mixes 4h, obtains the metal slime of water content 2wt%, puts in the self-made mold of unidirectional extruder after cooling a little, applies The extrusion force of 120kN enables the metal sludge to be uniformly and continuously extruded from the extrusion hole with a diameter of 1.2mm, and the extruded wire billet is flatly placed in a flat die, and naturally air-dried for 24 hours to obtain a wire billet with a certain strength. Cut the wire billet to a length of 170 mm, place it in a specific groove mold, and bake it in a vacuum sintering furnace. The sintering heating rate is 2°C / min, the sintering temperature is 1000°C, the high tem...

Embodiment 2

[0028] A kind of Ni-Cr base alloy welding wire, its preparation process is, the mass fraction is the Ni powder of 80wt%, the Cr powder of 10wt%, the Fe powder of 5wt%, the B powder of 5wt%, add the B powder of mass fraction 0.5wt% in addition C powder, mixed with the prepared PVA solution, the PVA solution contains 15wt% PVA mass fraction, placed in a kneader and mixed for 4h, to obtain a metal powder with a moisture content of 1.5wt%, and placed in a one-way In the self-made mold of the extruder, apply an extrusion force of 150kN, so that the metal sludge is uniformly and continuously extruded from the extrusion hole with a diameter of 2mm. Obtain a wire blank with a certain strength. Cut the wire billet to a length of 250mm, place it in a specific groove mold, and bake it in a vacuum sintering furnace. The sintering heating rate is 4°C / min, and the holding curves are respectively set at 180°C, 380°C and 600°C to complete the sintering The temperature is 1010°C, the high tem...

Embodiment 3

[0030]A kind of Ni-Cr base alloy welding wire, its preparation process is, the mass fraction is the Ni powder of 50wt%, the Cr powder of 30wt%, the Fe powder of 10wt%, the Al powder of 5wt%, the B powder of 5wt%, and configuration The good PEG solutions are mixed, placed in a kneader and mixed for 6 hours to obtain a metal powder with a water content of 1wt%, which is placed in a self-made mold of a one-way extruder after a little cooling, and an extrusion force of 180kN is applied to make the metal powder The mud material is uniformly and continuously extruded from the extrusion hole with a diameter of 2 mm, and the extruded wire billet is flatly placed in a flat die, and naturally air-dried for 10 hours to obtain a wire billet with a certain strength. Cut the wire billet to a length of 200mm, place it in a specific groove mold, and bake it in a vacuum sintering furnace. The sintering heating rate is 6°C / min, and the holding curves are set at 180°C, 380°C and 600°C respectivel...

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Abstract

The invention relates to a Ni-Cr-based alloy welding wire and a preparation method thereof. The welding wire consists of the following components in percentage by weight: 30-80wt% of Ni, 5-40wt% of Cr, one or more of 0-35wt% of Al, Cu, Fe, Mn, Co, Ti, Zr and Hf and one or two or three of 0-8wt% of B, C and O. The welding wire preparation process comprises the following steps: mixing, link blank extrusion-forming and degreasing-sintering, wherein the diameter of the extruded welding wire is smaller than or equal to 2 mm. The prepared alloy welding wire is great in component range, and is suitable for multi-variety small-batch production. Compared with a wire obtained by a conventional drawing method, the prepared alloy welding wire is better in structure component consistency, is free of component segregation, is free of processing hardening, is high in yield, has a welding melting point lower than that of a welding wire produced by a drawing method by 100-200 DEG C, is high in weldingstrength; and after being polished, a welding seam is attractive and uniform, and is good in associativity with a base material.

Description

technical field [0001] The invention relates to a Ni-Cr base alloy welding wire and a preparation method thereof, belonging to the field of metal processing and preparation. Background technique [0002] Ni-Cr-based alloy has high resistance to high temperature oxidation and corrosion, and can be made into welding wire for welding alloy materials such as steel claws and hammer heads for aluminum electrolysis, and can also be used for micro-repair welding of biomedical alloys and high-end decorations . However, since the Ni-Cr alloy contains high Cr and contains a small amount of C and B, the alloy has poor processing plasticity and is a hard-to-deform alloy material, and the yield is low when it is made into a thinner wire. [0003] Patent 1034637C discloses a carbon dioxide gas shielded welding ultra-fine welding wire with a diameter of 0.3-0.8mm. The specific production process of welding wire is not given. [0004] "Research on the Hydrostatic Extrusion Process of Ultr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/0261B23K35/304B23K35/40
Inventor 马军义刘英柴登鹏侯光辉李致远刘丹李冬生曹永峰李静
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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