Gas shielded welding wire used for X100 pipeline steel

Abstract

The invention discloses a gas shielded welding wire used for X100 pipeline steel, and the gas shielded welding wire comprises the following components in percentage by weight: 0.06-0.12% of C, 1.60-2.20% of Mn, 0.25-0.60% of Si, more than 0 and less than or equal to 0.015% of P, more than 0 and less than or equal to 0.010% of S, 0.45-0.65% of Mo, 0.10-0.35% of Cu, 0.20-0.45% of Cr, 1.80-2.60% of Ni and the balance of Fe and inevitable impurities. The gas shielded welding wire is prepared according to the common welding wire production technology. In the gas shielded welding wire, the comprehensive action and welding line ingredients of each element are similar to the ingredients, ratio and comprehensive performance of an X100 pipeline steel system; a welding line has excellent mechanical and physical properties, better corrosion resistance, lower hardness and the like; the tensile strength Rm of the deposited metal of the welding wire is more than or equal to 800MPa, and impact power Akv at minus 10 DEG C is more than or equal to 100J; and the gas shielded welding wire has the characteristics of good welding technology performance, stable welding line strength, stable impact toughness and the like, thus, the gas shielded welding wire is especially suitable for gas shielding welding of X100 pipeline steel plates.

Description

technical field [0001] The invention belongs to a solid welding wire for metal material welding, in particular to a solid welding wire for gas-shielded welding of X100 pipeline steel, which is especially suitable for welding in 80% Ar+20% CO 2 Under the protection of argon-rich gas, gas-shielded welding is carried out on X100 grade high-pressure oil and gas transmission pipeline steel. Background technique [0002] As an efficient and clean energy, natural gas is attracting more and more attention. Since natural gas fields are generally located in desert areas far away from the consumer market, how to safely and economically transport natural gas to the consumer market has always been one of the key issues in the development of the natural gas industry. It is the most effective way to reduce the cost of long-distance natural gas transmission through technological innovation and the use of higher pressure and higher strength pipelines, which is also the development trend of ...

AI Technical Summary

Problems solved by technology

Since the welding wire does not contain Cr element, and the contents of Ni and Mo elements are insufficient, and it also contains Ti element, and the difference in the content of other components, it has poor compatibility with the X100 pipeline steel alloy system, and its deposited metal properties cannot meet the requirements. Requirements; and the applicant discloses a kind of gas-shielded welding wire specially used for X80 pipeline steel in the patent document whose publication number is CN101362263A, and the name is called "X80 grade steel oil, gas conveying pipe gas-shielded welding wire", although this welding wire contains Cr element, but the content of Ni and Mo elements is still insufficient, especially the content of Ni element is far from meeting the requirements. At the same time, it contains not only Ti element, but also B element, and the difference in the proportion of other components, so there are still differences with X100 The matching of the alloy system of pipeline steel is poor, and the properties of its deposited metal cannot meet the welding requirements of X100 pipeline steel.