Pre-melted-slag-magnesium grain cored wire, application of pre-melted-slag-magnesium grain cored wire and production process for high heat input welding steel
A technology for high-energy welding and production process, which is applied to the steel production process for high-energy welding and the field of pre-melted slag-magnesium cored wire, which can solve difficult Mg content, adjust the timing of adding Mg, and cannot fully realize Mg. Independent control, precise control of Mg in difficult steel, etc., to achieve the effect of high effect and utilization rate, dispersion of inclusions, and refinement of structure
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Embodiment 1
[0032] A pre-melted slag-magnesium particle cored wire with a diameter of 13mm, the cored wire includes an outer layer and a core; the outer layer is low carbon steel 08Al with a thickness of 1.0mm; the core is slow release passivated magnesium particles , The core includes slow-release agent and passivated magnesium particles, the slow-release agent is calcium aluminate pre-melted slag, the slow-release agent accounts for 75% of the core content, and the passivated magnesium particles account for 25% of the core content. Passivated magnesium grains contain 92% magnesium, and the rest are passivating agents and unavoidable impurities.
[0033] The chemical composition and mass percentage range of the slow-release agent calcium aluminate pre-melted slag are as follows: Al 2 o 3 : 46%, CaO: 43%, SiO 2 : 3%, MgO: 4%, Na 2 O: 2%, H 2 O: 0.5%, and the balance is unavoidable impurities.
[0034] The particle size of passivated magnesium particles is 0.5-3 mm, and the proportion...
Embodiment 2
[0044] A pre-melted slag-magnesium particle cored wire with a diameter of 12mm, the cored wire includes an outer layer and a core; the outer layer is low carbon steel 08Al with a thickness of 1.0mm; the core is slow-release passivated magnesium particles , The core includes slow-release agent and passivated magnesium particles, the slow-release agent is calcium aluminate pre-melted slag, the slow-release agent accounts for 75% of the core content, and the passivated magnesium particles account for 25% of the core content. Passivated magnesium grains contain 93% magnesium, and the rest are passivating agents and unavoidable impurities.
[0045] The chemical composition and mass percentage range of the slow-release agent calcium aluminate pre-melted slag are as follows: Al 2 o 3 : 45%, CaO: 44%, SiO 2 : 4%, MgO: 3%, Na 2 O: 3%, H 2 O: 0.5%, and the balance is unavoidable impurities.
[0046] The particle size of passivated magnesium particles is 0.5-3 mm, and the proportion...
Embodiment 3
[0056] A pre-melted slag-magnesium particle cored wire with a diameter of 11mm, the cored wire includes an outer layer and a core; the outer layer is low carbon steel 08Al with a thickness of 1.0mm; the core is slow-release passivated magnesium particles , The core includes slow-release agent and passivated magnesium particles, the slow-release agent is calcium aluminate pre-melted slag, the slow-release agent accounts for 75% of the core content, and the passivated magnesium particles account for 25% of the core content.
[0057] The chemical composition and mass percentage range of the slow-release agent calcium aluminate pre-melted slag are as follows: Al 2 o 3 : 46%, CaO: 41%, SiO 2 : 4%, MgO: 4%, Na 2 O: 4%, H 2 O: 0.5%, and the balance is unavoidable impurities.
[0058] The particle size of passivated magnesium particles is 0.5-3 mm, and the proportion of particle size ≤ 80 mesh is 4%.
[0059] Bulk density of core-coated slow-release passivated magnesium particles...
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