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

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 TIG welding head with a multi-axis servo movement mechanism and a welding method. A walking mechanism is installed on a walking track so that the TIG welding head can move along the walking track. A wire feeding mechanism is installed on one side of the walking mechanism and used for feeding a welding wire when the TIG welding head performs welding. A swinging mechanism is fixed to the upper portion of the walking mechanism and connected with one side of a vertical adjusting mechanism through a welding gun angle adjusting arm, the other side of the vertical adjusting mechanism is connected with a front-end welding mechanism, and therefore a welding gun can swing in a reciprocating mode in the width direction of a welding seam when the TIG welding head performs welding. The vertical adjusting mechanism is used for adjusting the distance between the welding gun and a workpiece. The front-end welding mechanism is used for adjusting the position of the welding wire and the position of a tungsten electrode. The TIG welding head is economical, practical, compact in structure, small, portable, convenient to clamp, convenient to disassemble and maintain due to modularization, high in automation degree and capable of achieving remote monitoring and control in the welding process.

The invention relates to a solid welding wire for steel castings of ultra-supercritical thermal power steam turbines at 650°C, which belongs to the field of welding materials and solves the problem that the deposited metal produced by the existing welding wire cannot meet the mechanical performance requirements of steel castings of ultra-supercritical thermal power steam turbines . The composition of the core wire of the welding wire includes: C: 0.05%‑0.12%, Mn: 0.3%‑0.9%, Si: ≤0.50%, P: ≤0.010%, S: ≤0.01%, Cr: 8.5%‑ 9.3%, Co: 2.5%‑3.5%, W: 2.5%‑3.5%, Ni: 0.05%‑0.25%, Nb: 0.02%‑0.08%, V: 0.12%‑0.32%, B: 0.002%‑0.008% , N: 0.015%‑0.025%. The invention obtains physical and chemical properties similar to the parent metal by adding trace alloy elements and moderately adjusting the content of some elements, and is especially suitable for repair welding and structural welding of ultra-supercritical steam turbine castings, especially for welding of heat-resistant steel MARBN.

The invention belongs to the technical field of welding materials, in particular to a low-hydrogen easy-to-weld basic flux-cored wire for structural steel prepared from steel slag. It is made of low-carbon cold-rolled steel strip wrapped core powder, which includes steel slag 22%‑28%, Mo40V40Al20 powder 7.5%‑9.0%, FeMn60Si34C0.02 powder 5.6%‑8.2%, FeTi80‑A powder 4.1%‑ 5.0%, CaF plated with Ni on the surface 2 Powder 7.8%‑9.6%, Nano TiO 2 4.2%-6.0%, 200 mesh nitrocellulose powder 3.1%-3.8%, feldspar 2.1%-3.0%, and the balance is FHT100·25 reduced iron powder. The invention has stable arc, small spatter, good post-weld forming, easy slag removal, suitable for all-position welding, low residual hydrogen content in deposited metal, uniform chemical composition and high mechanical properties, and is an innovation in the field of basic flux-cored welding wire. .

The invention relates to an oscillating-arc narrow-gap MIG / MAG (Metal Inert Gas / Metal Active Gas) welding torch to solve the problem that side walls are not fused during narrow-gap welding. A motor gear is fixedly arranged on an output shaft of a motor. A transition gear is synchronously engaged with the motor gear and an oscillating gear. Two ends of a conductive plate are respectively connected with a welding gun connector and a conductive shaft. The conductive shaft is arranged in a center hole of the oscillating gear and is fixedly connected with the oscillating gear. A conductive shaft sleeve and the conductive shaft form a cavity. The cavity is communicated with two water holes formed in the conductive shaft. Two water pipes respectively communicate a water inlet and a water outlet with the two water holes in the conductive shaft. The upper end of a bent conductive rod is connected onto the conductive shaft through a thread and the lower end of the bent conductive rod penetrates through an external narrow-gap spray nozzle. The axis of a bending head at the lower part of the bent conductive rod and the axis of the conductive shaft form an included angle of 5-15 degrees. A contact tip is connected onto the bending head through a thread. A spray nozzle height adjusting part is installed on the shell of the welding gun. The external narrow-gap spray nozzle is fixedly arranged below the spray height adjusting part. The oscillating-arc narrow-gap MIG / MAG welding torch is used for narrow-gap welding.

The invention provides an acidic high-strength and high-toughness flux-cored welding wire, which includes a flux core and a sheath coated on the outside of the flux core; the flux core includes the following components in parts by weight: 300-430 parts of rutile; 20-430 parts of feldspar 40 parts; 13-25 parts of quartz; 8-20 parts of zircon sand; 4-14 parts of magnesia; 3-10 parts of sodium fluoride; 5-13 parts of iron; 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; 110-150 parts of nickel powder; 45-70 parts of ferromolybdenum; 3-12 parts of graphite, iron powder balance; the sum of the parts by weight of each powder component is 1000 parts. The acidic flux-cored welding wire of the present invention still has relatively high low-temperature impact toughness and good cold cracking resistance at relatively high strength.

The invention provides a special fine-diameter flux-cored wire for hot-working die repairing surfacing. The special fine-diameter flux-cored wire comprises a welding stick pipe wall and powder wrapped in the welding stick pipe wall. The powder comprises a deoxygenation alloying agent and a slag former. Nanometer chromium nitride powder is added in iron-based alloy powder, a fine nitride interstitial phase is formed in surfacing metal, and the surfacing metal has good tenacity and good crack resistance. Meanwhile, yttrium oxide is added in alloy powder, the surfacing metal is purified, balling is carried out on inclusions, a nitride strengthening phase is promoted to be formed, and the fatigue resistance of the surfacing metal is improved. A hot-working die is repaired through a gas metal arc welding technology with the cooperation of the flux-cored wire and rich-chlorine gas protection, and the obtained surfacing metal has the superior high-temperature oxidization resistance, the superior abrasion resistance, the superior cleanliness and the good fatigue resistance.