Preparation method of gas shielded welding wire

A technology for gas shielding and welding wire, which is applied in the field of preparation of gas shielded welding wire, can solve the problems of inability to meet welding requirements and decrease in strength, and achieve the effects of high strength, stable production process and improved mechanical properties.

Inactive Publication Date: 2014-05-07

无锡市华瑞渔机厂

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AI-Extracted Technical Summary

Problems solved by technology

Although its toughness has been improved to a certain extent, it still cannot meet the welding requirements of some steel types, and ...

Abstract

The invention discloses a preparation method of a gas shielded welding wire. The gas shielded welding wire is composed of C, Si, Mn, P, S, Nb, Ti, Ca, Ni, N, O and Fe. The preparation method comprises 1) obtaining a casting blank composed of the component above through molten iron desulphurization, converter top and bottom blowing, vacuum deep processing and composition fine adjustment; 2) rolling control including controlling the rolling start speed to be 1160-1180 DEG C, the rolling control tail three-stage accumulative reduction rate to be larger than or equal to 35% and the finishing rolling temperature to be 880-900 DEG C; 3) cooling control including controlling the cooling speed of the welding wire to be larger than or equal to 6 DEG C/s to cool the welding wire to room temperature for inspection and delivery. By means of reasonable composition and proportion and low-alloy-element design, the welding wire is provided with excellent strength and toughness matching. When the welding wire is used for welding, welding joints can be provided with a high strength (Rm >= 750 MPa) and an excellent low-temperature toughness (-20 DEG C Akv >= 200 J).

Application Domain

Welding/cutting media/materialsSoldering media

Technology Topic

Alloy elementReduction rate +8

Examples

Experimental program(3)

Example Embodiment

[0014] Example one

[0015] A method for preparing a gas shielded welding wire, the welding wire is composed of the following components in terms of weight percentage: C: 0.12%, Si: 0.60%, Mn: 0.40%, P≤0.015%, S≤0.010%, Nb: 0.09%, Ti: 0.04%, Ca: 0.035%; Ni: 1.1%, N: 0.0060%, O: 0.0020%, the rest is Fe and unavoidable inclusions; the preparation method is:

[0016] 1) Desulfurization of molten iron, converter top and bottom blowing, deep vacuum treatment and composition fine-modulation into the casting slab of the above composition;

[0017] 2) Controlled rolling: The controlled rolling method is: the start rolling temperature is 1160°C, the cumulative reduction rate of the last three passes of controlled rolling is ≥35%, and the final rolling temperature is 900°C;

[0018] 3) Controlled cooling: Control the welding wire cooling rate ≥6°C/s, and air-cool the welding wire to room temperature, then the delivery can be inspected.

Example Embodiment

[0019] Example two

[0020] A method for preparing a gas shielded welding wire. The welding wire is composed of the following components in weight percentage: C: 0.18%, Si: 0.40%, Mn: 0.50%, P≤0.015%, S≤0.010%, Nb: 0.07%, Ti: 0.06%, Ca: 0.015%; Ni: 1.3%, N: 0.0020%, O: 0.0060%, the rest is Fe and unavoidable inclusions; the preparation method is:

[0021] 1) Desulfurization of molten iron, converter top and bottom blowing, deep vacuum treatment and composition fine-modulation into the casting slab of the above composition;

[0022] 2) Controlled rolling: The controlled rolling method is: the initial rolling temperature is 1180°C, the cumulative reduction rate of the last three passes of controlled rolling is ≥35%, and the final rolling temperature is 880°C;

[0023] 3) Controlled cooling: Control the welding wire cooling rate ≥6°C/s, and air-cool the welding wire to room temperature, then the delivery can be inspected.

Example Embodiment

[0024] Example three

[0025] A method for preparing a gas shielded welding wire, the welding wire is composed of the following components in terms of weight percentage: C: 0.15%, Si: 0.50%, Mn: 0.45%, P≤0.015%, S≤0.010%, Nb: 0.08%, Ti: 0.05%, Ca: 0.025%; Ni: 1.2%, N: 0.0040%, O: 0.0040%, the rest is Fe and unavoidable inclusions; the preparation method is:

[0026] 1) Desulfurization of molten iron, converter top and bottom blowing, deep vacuum treatment and composition fine-modulation into the casting slab of the above composition;

[0027] 2) Controlled rolling: The controlled rolling method is: the start rolling temperature is 1170°C, the cumulative reduction rate of the last three passes of the controlled rolling is ≥35%, and the final rolling temperature is 890°C;

[0028] 3) Controlled cooling: Control the welding wire cooling rate ≥6°C/s, and air-cool the welding wire to room temperature, then the delivery can be inspected.

PUM

Description & Claims & Application Information

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ActiveCN105864368Areduce manufacturing costsimple control

Owner:青岛莱吉传动系统科技有限公司

Classification and recommendation of technical efficacy words

reduce manufacturing cost

Preparation method of gas shielded welding wire

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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