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A nickel-iron precision alloy welding wire

A technology of precision alloy and welding wire, applied in the welding field of nickel-iron precision alloy welding wire and nickel-iron series precision alloy material, can solve the problem of not considering material applicability, etc., and achieve good welding process performance, high tensile strength, ideal toughness and the effect of swelling properties

Active Publication Date: 2016-07-27
BAOSHAN IRON & STEEL CO LTD
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  • Description
  • Claims
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Problems solved by technology

[0008] The above-mentioned Chinese patents all have ultra-high strength, or have ultra-low linear expansion coefficient, or other functional characteristics through the adjustment of composition and manufacturing process, so as to adapt to their specific applications, but none of them consider it from the perspective of welding Material applicability

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  • A nickel-iron precision alloy welding wire
  • A nickel-iron precision alloy welding wire
  • A nickel-iron precision alloy welding wire

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with embodiment.

[0029] According to the composition range proposed by the present invention, 5 kinds of nickel-based alloy welding wires were manufactured through processes such as smelting, rolling, drawing, etc., the composition of which is shown in Table 2, and the diameter of the welding wire is 1.2mm.

[0030] The performance test of deposited metal is carried out by the method of metal arc shielded welding. The welding shielding gas is 80% Ar+20% He, the gas flow rate is 20L / min, the welding current is 240-260A, the welding voltage is 27-29V, and the welding speed is 300mm / min. min, the interlayer temperature was controlled to be ≤120°C, and the obtained deposited metal was heated to 840°C for 1 hour and then quenched in water. The corresponding properties of the deposited metal were shown in Table 3. Among them, after the linear expansion coefficient measurement sample is machined, it is also...

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PUM

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Abstract

The invention discloses a ferronickel precision alloy welding wire which comprises, by weight, 0.1%-0.2% of C, 0.4%-0.5% of Mn, 0.2%-0.3% of Si, 35%-37% of Ni, 0.4%-0.5% of Ti, 1.0%-1.2% of Nb, less than or equal to 0.005% of S, less than or equal to 0.01% of P, and the balance Fe and inevitably impurities, wherein C / (Nb + Ti) < 0.2. According to the ferronickel precision alloy welding wire, a system of Ni-Fe alloy is adopted, tensile strength of welding metal can be improved, and tenacity and low expansion coefficients of the welding metal are guaranteed. Deposited metal performance indexes of the ferronickel precision alloy welding wire include: the tensile strength (Rm) is greater than or equal to 480MPa, impacting tenacity (AKV2, 20 DEG C) is 50 J / cm2, and a coefficient of linear expansion (20-100 DEG C) is less than or equal to 1.2 * 10 - 6 / DEG C. The ferronickel precision alloy welding wire is capable of being used in the field of ferronickel precision alloy welding.

Description

technical field [0001] The invention belongs to the field of welding materials, and in particular relates to a nickel-iron precision alloy welding wire, which is mainly used for welding nickel-iron series precision alloy materials. Background technique [0002] 4J36 alloy is a precision alloy with a low expansion coefficient. The corresponding foreign brand is Invar (INVAR) alloy, which has a very low expansion coefficient. Its application field has expanded from the traditional field of precision measuring instruments to the field of electronic industry and special structural materials. The fields where 4J36 alloy is used as a special structural material include liquefied petroleum gas storage tanks, long-distance power transmission lines, and molds for large aircraft composite materials. [0003] With the expansion of the application field of 4J36 alloy, especially the demand for energy saving and emission reduction of aircraft, a large number of composite materials have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/34
Inventor 朱双春王宝森陆建生
Owner BAOSHAN IRON & STEEL CO LTD
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