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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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
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