Acid electrode with good process performance

Abstract

The invention discloses an acid electrode with good process performance, and belongs to the technical field of welding materials. The electrode consists of a core wire and a coating. The coating is characterized by comprising the following components in percentage by weight: 25 to 35 percent of titanium pigment and rutile, 15 to 20 percent of selected ilmenite, 5 to 10 percent of marble and dolomite, 5 to 10 percent of white mud, 3 to 8 percent of mica, 8 to 15 percent of potash feldspar, 4 to 7 percent of quartz sand, 8 to 13 percent of manganese-silicon, 2 to 4.5 percent of chalk, 1 to 1.5 percent of sodium carbonate, 3 to 5 percent of organic matters and 0.5 to 2 percent of rare earth magnesium powder, atomized iron powder and aluminum powder, wherein the grain size of each component is 40 to 200 meshes. Potassium sodium water glass is used as a bonding agent; the modulus is 2.4 to 2.7; and the Baume concentration is 36 to 39. After uniformly mixing the components of the coating of the electrode, adding the water glass and stirring uniformly to obtain a mixture, a carbon steel covered electrode is manufactured by extruding the mixture on a core wire H08A; or a low-alloy steel electrode is manufactured by extruding the mixture on a low-alloy steel core wire. The electrode of the invention has the characteristics of high arc reignition, slag detachability and all-position welding adaptability, and low cost of electrode raw material.

Description

Technical field: [0001] The invention belongs to the technical field of welding materials and provides an acid welding rod with good process performance. Background technique [0002] Compared with the basic electrode, the acid electrode has excellent process performance and is widely used in general structures, especially the titanium-calcium structural steel electrode E4303 is a large-scale and wide-ranging electrode in my country, which is widely used in carbon steel, low- Alloy steel welding. Titanium-calcium structural steel electrodes are generally added with more than 30% titanium dioxide and less than 20% carbonate, as well as certain silicate and ferromanganese. In recent years, with the intensification of competition in the electrode market and changes in electrode raw materials, the process performance of acid electrodes still cannot meet the increasing requirements of users for the process performance of electrodes. [0003] The traditional welding rod re-strike...

AI Technical Summary

Problems solved by technology

Acidic slag containing more SiO2 belongs to long slag, which takes a long time to solidify and is not suitable for welding at spatial positions such as overhead welding. The amount of 2 to form high-acidity slag is the basic way to improve the performance of welding rods, but high acidity is not good for the control of weld impurities and inclusions, which affects the mechanical properties of the weld, and the improvement of TiO2 The amount will increase the cost of welding rods, because substances containing TiO2 such as rutile, titanium dioxide, etc. are expensive raw materials for welding rods