Welding flux for X70 pipeline steel longitudinal submerged arc welding and preparation method of welding flux
A technology of straight seam submerged arc welding and pipeline steel, applied in arc welding equipment, welding equipment, welding equipment, etc., to achieve the effect of reducing labor intensity, improving one-time pass rate, and good low-temperature impact toughness
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[0020] A kind of preparation method of above-mentioned X70 pipeline steel straight seam submerged arc welding flux, described steps are as follows:
[0021] (1) Raw material preparation, MnO, GaF, Al2O3, MgO, SiFe raw materials with good quality and high purity;
[0022] (2) Processing the raw materials in step (1) into 100-mesh fine powder respectively to obtain the raw material fine powder;
[0023] (3) Weigh out the raw material fine powder prepared in step (2) according to the formula and mix evenly to obtain the mixed raw material;
[0024] (4) Adding the mixed raw material prepared in step (3) into sodium silicate and stirring to obtain millet-shaped granules;
[0025] (5) drying the semi-solid raw material prepared in step (4), and controlling the moisture content within 5% after drying;
[0026] (6) Sintering, heat the flux dried in step (5) at a temperature of 790-810 degrees for 90-110 minutes;
[0027] (7) Pass the flux sintered in step (6) through a 10-26 mesh s...
Embodiment 1
[0029] A kind of flux for straight seam submerged arc welding of X70 pipeline steel, the chemical formula of described flux comprises MnO9wt.%, GaF20wt.%, Al 2 0 3 20 wt.%, MgO32 wt.%, siFeO.9 wt.%.
[0030] The above-mentioned flux for linear submerged arc welding of X70 pipeline steel, the basicity of the flux for linear submerged arc welding of X70 pipeline steel is 1.2.
[0031] A preparation method of flux for X70 pipeline steel longitudinal submerged arc welding as described above, the steps are as follows:
[0032] (1) Prepare raw materials, prepare high-quality MnO, GaF, Al203, MgO, SiFe raw materials;
[0033] (2) Processing the raw materials in step (1) into 100-mesh fine powder respectively to obtain the raw material fine powder;
[0034] (3) Weigh out the raw material fine powder prepared in step (2) according to the formula and mix evenly to obtain the mixed raw material;
[0035] (4) Adding the mixed raw material prepared in step (3) into sodium silicate and ...
Embodiment 2
[0040] A kind of flux for straight seam submerged arc welding of X70 pipeline steel, the chemical formula of described flux comprises MnO10wt.%, GaF25wt.%, Al 2 0 3 23wt.%, MgO36 wt.%, siFe1.05 wt.%.
[0041] For the X70 pipeline steel longitudinal submerged arc welding flux described above, the basicity of the X70 pipeline steel longitudinal submerged arc welding flux is 1.4.
[0042] A preparation method of flux for X70 pipeline steel longitudinal submerged arc welding as described above, the steps are as follows:
[0043] (1) Prepare raw materials, prepare high-quality MnO, GaF, Al203, MgO, SiFe raw materials;
[0044] (2) Processing the raw materials in step (1) into 100-mesh fine powder respectively to obtain the raw material fine powder;
[0045] (3) Weigh out the raw material fine powder prepared in step (2) according to the formula and mix evenly to obtain the mixed raw material;
[0046] (4) Adding the mixed raw material prepared in step (3) into sodium silicate a...
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