43results about How to "Suitable for all position welding" patented technology

The invention discloses a weather-proof flux core wire used for coating-free bridge steel and a preparing method of the weather-proof flux core wire. The weather-proof flux core wire is composed of a steel skin and a powder core. The powder core comprises, by weight percent, 2%-8% of ferro-boron, 0.01%-2% of ferromolybdenum, 1%-6% of fluoride, 1.5%-8% of zircon sand, 2%-7% of magnesium powder, 2%-5% of quartz sand, 2%-8% of silicon iron, 5%-19% of electrolytic manganese, 1%-5% of ferromanganese, 1%-6% of nickel powder, 1%-8% of chromium metal, 1%-8% of copper powder, 2%-9% of ferrotitanium, 0.1%-5% of feldspar, 2%-8% of sodium titanate, 20%-40% of rutile and the balance iron powder. Compared with the prior art, the weather-proof flux core wire is stable in welding arc and little in splashing, slag removing is easy, a welding joint is formed attractively, the weather-proof flux core wire is suitable for all-position welding, the mechanical performance of the welding joint is good, the impact toughness at the temperature of minus 40 DEG C is larger than 80 J, and very high corrosion resistance is achieved.

The invention provides a flux-cored wire for the all-position welding of an austenitic stainless steel, comprising flux powder and a stainless steel band for external use, wherein the weight of a flux core accounts for 28.0-30.0 percent of the total weight of the flux-cored wire, the flux core contains the following components accounting for the flux core in percentage by weight: 25.0%-28.0% of metallic chromium powder, 29.0%-32.0% of metallic nickel powder, 4.0%-5.0% of electrolytic metallic manganese, 2.0%-4.0% of high carbon ferro-chrome, 18.0%-20.0% of rutiles, 1.0%-2.0% of quartz, 1.0%-2.0% of zircon sands, 1.0%-3.0% of feldspars, 0.5%-1.0% of fluorspars, 0.5%-1.5% of calcium carbonate, 0.5%-1.5% of barium carbonate, and the balance of ferrous powder. The flux-cored wire has good welding process property and is suitable for the all-position gas-shielded welding of a high-chromium-nickel all-austenitic stainless steel.

The invention provides an alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire which is composed of a flux core and a steel skin, wherein the flux core occupies 14-16% of the total weight of the wire. Weight percentages occupied by all components of the flux core are that TiO2 occupies 25-40%, MgO occupies 1-4%, CaCO3 occupies 0.4-0.8%, NaF occupies 1-3%, Na2SiF6 occupies 1-3%, silicomanganese occupies 4.5-20%, cryolite occupies 2-4%, feldspar occupies 4-10%, Teflon occupies 0.2-0.6%, iron alloy occupies 20-35%, and pure metal powder occupies 12-20%. The alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire has excellent welding process performance due to the fact that pure CO2 serves as protection gases, and is applicable to all-position welding. In addition, the alkaline CO2 gas protection dilute alloy heat resistant steel flux-cored wire is good in weld joint molten slag coverage, easy to deslug, high in deposition efficiency, good in rust resistance and attractive in formed weld joints.

The invention discloses a corrosion-resistant flux-cored welding wire used for gas shielded welding; the flux-cored welding wire is characterized in that the chemical components and content of the alloy powder in percentage by total weight of the wire are as follows: 0.03%-0.08% of C, 0.3%-0.7% of Si, 1.1%-1.5% of Mn, less than or equal to 0.015% of S, less than or equal to 0.02% of P, 0.2%-0.5% of Cu, 0.4%-0.8% of Cr, 0.2%-0.6% of Ni, 0.03%-0.1% of Ti, 0.02%-0.10% of Sb, and the balance of iron and unavoidable impurity; and meanwhile, the ratio of Cu and Sb elements is controlled to be within the range of 4.0-8.0. The wire deposited metal and the welded have excellent mechanical property, the deposited metal has the tensile strength of more than 550MPa and has the impact toughness of more than 60J at (-40) DEG C. The gas shielded welding wire has the combination property of air-corrosion resistance and sulphuric acid dew point corrosion resistance, and meanwhile, the wire is wide in welding parameter adjustment range, stable in welding process and attractive in the formed welding line, so that the wire is beneficial to the all-position welding.

The invention provides a high-strength steel electrode used for a minus 50 DEG C low temperature spherical tank. According to the high-strength steel electrode, a CaO-TiO2-CaF2 slag system formula is adopted, and microcrystalline alloying elements are added into a deposited metal on the basis of 2.5% Ni, so that the welding technology property of the electrode is good, when welded under a heat input of 30-40 KJ/cm and under a heat treatment condition of 580 DEG C*4 h, the deposited metal has tensile strength Rm of 630 MPA or above, minus 60 DEG C KV2 is 60 J or above, and the welded joint of the deposited metal has the tensile strength Rm of 610 MPa or above, minus 50 DEG C KV2 is 70 J or above, therefore, the high-strength steel electrode is very applicable to weld and construction of the minus 50 DEG C low temperature ethylene/propylene spherical tank.

The invention discloses an all position welding low hydrogen type electrode excellent in low temperature impact toughness and for SA-508Gr.4N steel, and relates to the weld material technology field.The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel solves the problems that an existing low hydrogen type electrode for the SA-508Gr.4N steel is poor in low temperature impact toughness and unsuitable for all position welding. The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel comprises a core wire and a coating, wherein the core wire consists of C, Si, Mn, S, P and the balance Fe, the coating consists of a powder material and a binding agent, and the power material consists of marble, fluorite, strontium carbonate, titanium dioxide, quartz, yttrium-based silicon iron, ferrotitanium, electrolytic manganese, mid-carbon ferromanganese, nickel powder, sodium carbonate and potassium alginate. The all position welding low hydrogen type electrode excellent in low temperature impact toughness and for the SA-508Gr.4N steel has excellent allposition welding technology performance, and is stable in electric arc, small in splashing amount and moderate in sleeving especially in vertical welding and overhead welding, melts the coating evenly, enables a weld pass to be beautiful in shaping, achieves good operability for welding operators, and has ideal mechanical performance. The all position welding low hydrogen type electrode excellentin low temperature impact toughness and for the SA-508Gr.4N steel is suitable for the all position welding of the SA-508Gr.4N steel.

The invention provides a high-strength high-toughness weather-resistant gas protection welding wire for steel. The welding wire steel comprises, in weight percentage, 0.03%-0.11% of C, 0.70%-1.50% of Mn, 0.25%-0.90% of Si, 0.55%-1.40% of Ni, 0.15%-0.45% of Cu, 0.05%-0.18% of Ti, not more than 0.015% of S, and not more than 0.020% of P, the balance being iron and inevitable impurities. The welding wire is used for the welding of steel of the 550 MPa strength grade; the welding wire steel smelting process is stable and easy to implement, and the technical requirements for welding high-strength, high-toughness and high-weather resistance steel are met. The gas protection welding wire has excellent welding process properties, has the advantages of stable welding arcs, less splatter, zero gas pores and artistic formation and is suitable for all-position welding.

The invention relates to a gas shielded solid welding wire used for steel with the yield strength being 460 MPa and a manufacturing method. The gas shielded solid welding wire comprises, by mass, 0.04%-0.12% of C, 0.9%-1.4% of Mn, 0.4%-0.8% of Si, 0.8%-1.1% of Ni, 0.08%-0.2% of Mo, 0.02%-0.05% of Ti, 0.0015%-0.0030% of B, 0.20%-0.25% of Cu, less than or equal to 0.01% of Al, less than or equal to0.010% of S, less than or equal to 0.020% of P, less than or equal to 0.005% of O, less than or equal to 0.005% of N, 0.0050%-0.010% of Ce, and the balance iron powder and unavoidable impurities. Whengas shielded welding with 80% of Ar and 20% of CO2 is conducted, the mechanical properties of deposited metal reach welding requirements of steel with the yield strength being 460 MPa and used for marine engineering, impact energy at -40 DEG C is over 120 J, and NDT is below -60 DEG C.

The invention provides an acidic high-strength and high-toughness flux-cored wire. The acidic high-strength and high-toughness flux-cored wire comprises a flux core and a sheath coating the outer sideof the flux core, wherein the flux core is prepared from the following components in parts by weight: 300-430 parts of rutile, 20-40 parts of feldspar, 13-25 parts of quartz, 8-20 parts of zircon sand, 4-14 parts of magnesia, 3-10 parts of sodium fluoride, 3-10 parts of sodium fluosilicate, 3-10 parts of lithium fluoride, 5-13 parts of ferrotitanium, 5-15 parts of magnesium powder, 2-9 parts of silicon-calcium alloy, 3-11 parts of aluminum-magnesium alloy, 22-40 parts of ferrosilicon, 14-25 parts of rare-earth ferrosilicon, 120-170 parts of metal manganese, 110-150 parts of nickel powder, 45-70 parts of ferromolybdenum, 3-12 parts of graphite and the balance of iron powder, wherein the sum of the parts by weight of the medicinal powder components is 1000 parts. The acidic flux-cored wireprovided by the invention still has relatively high low-temperature impact toughness and relatively good cold crack resistance at a relatively high strength.

The invention discloses a low-hydrogen high crack prevention welding rod. The low-hydrogen high crack prevention welding rod comprises, by total weight, 40-55% of marble, 10-20% of fluoride, 0.5-4% ofSiO2, 6-15% of TiO2, 0.1-2% of Al2O3, 2-7% of a nickel-magnesium alloy, 0.8-2.8% of Mn, 1-4% of Ni, 0.1-0.5% of B, smaller than or equal to 0.01% of P, smaller than or equal to 0.01% of N, 2-5% of sodium or potassium oxide, and a proper amount of an adhesion agent and inevitable impurities. The low-hydrogen high crack prevention welding rod can be applied to full-position welding of low temperature spherical tanks and the like.