A high-strength, low-temperature weld metal used to combine high-strength and low-alloy steel

摘要

In the microstructure of metal, the content of acid iron is from 5% to 45% by volume, the volume of potato is 50%, the upper part is degenerated bainita, the lower part is bainita, the particles are bainita, or mixed together. The elastic limit of the metal is 690 MPa, measured by the energy curve of Charpy, which is below - 50 ℃. Ferrous metals have the following alloy elements: 0.04% to 0.08% by weight of carbon; 1.0% to 2.0% by weight of manganese; 0.2% to 0.7% by weight of silicon; 0.3% to 0.8% by weight of molybdenum; 2.3% to 3.5% by weight of nickel; 0.0175% to 0.04% by weight of oxygen;Plus at least 0.04% by weight of zirconium plus 0.02% by weight of titanium In addition, the components of the weld metal include: 0.01% by weight of phosphorus; 0.01% by weight of sulfur; 0.03% by weight of aluminum; and0.02 weight of nitrogen It also includes a high strength low alloy steel welding process for producing metal arc welding metal in gas atmosphere, and a consumable welding cable for producing micro welding metal structure.