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.
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Embodiment 1
[0015] A method for preparing a gas shielded welding wire, the welding wire is composed of the following components in 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 inevitable inclusions; the preparation method is:
[0016] 1) The cast slab with the above composition is made through hot metal desulfurization, converter top-bottom blowing, vacuum deep treatment and composition fine-tuning;
[0017] 2) Controlled rolling: the controlled rolling method is as follows: the starting 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 cooling speed of the welding wire to ≥6°C / s, air-cool the welding wire to room temperature, and then inspect and deliver.
Embodiment 2
[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 inevitable inclusions; the preparation method is:
[0021] 1) The cast slab with the above composition is made through hot metal desulfurization, converter top-bottom blowing, vacuum deep treatment and composition fine-tuning;
[0022] 2) Controlled rolling: the controlled rolling method is as follows: the starting 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 cooling speed of the welding wire to ≥6°C / s, air-cool the welding wire to room temperature, and then inspect and deliver.
Embodiment 3
[0025] A method for preparing a gas shielded welding wire, the welding wire is composed of the following components in 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 inevitable inclusions; the preparation method is:
[0026] 1) The cast slab with the above composition is made through hot metal desulfurization, converter top-bottom blowing, vacuum deep treatment and composition fine-tuning;
[0027] 2) Controlled rolling: the controlled rolling method is as follows: the starting rolling temperature is 1170°C, the cumulative reduction ratio of the last three passes of controlled rolling is ≥35%, and the final rolling temperature is 890°C;
[0028] 3) Controlled cooling: Control the cooling speed of the welding wire to ≥6°C / s, air-cool the welding wire to room temperature, and then inspect and deliver.
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