Electric welding rod for welding large scale low temperature spherical tank steel

A welding rod, large-scale technology, used in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of low temperature impact toughness, low value, low temperature impact absorption energy can not meet the requirements, etc. Low temperature impact toughness and crack resistance, less spatter, good welding process performance
CN101537544AActive Publication Date: 2009-09-23TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP +1
1 Cites 19 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP
Publication Date
2009-09-23

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention relates to an electric welding rod for welding large scale low temperature spherical tank steel, consisting of a core welding-wire, an electrode covering and adhesive. The electric welding rod is manufactured according to the conventional manufacturing technique of the electric welding rod; the strength and the toughness of the electric welding rod can be enhanced by strictly controlling the lower percentage composition of S and P in auxiliary materials of the core welding-wire and the electrode covering. The invention has the advantages that the ultralow hydrogen sodium type electric welding rod has high strength and toughness, good welding technological properties, easy arc initiation, soft voltaic arc, little splatter, convenient slag detachability, delicate shaped weld mark, beautiful appearance and all-position welding; deposited metal is well purified and thinned, and has excellent low-temperature impact ductility and cracking resistance, low content of diffusible hydrogen as well as good performances of hot crack and cold crack resistance as well as reheating crack resistance; the welded deposited metal adapts to wide range of heat treatment parameter and has good actual construction adaptability, thus being applicable to welding a spherical tank, especially large scale spherical tanks made of propylene, ethylene and LPG.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field:

[0001] The invention relates to metal welding materials, in particular to an electric welding electrode used for welding large-scale low-temperature spherical tank steel. Background technique:

[0002] With the rapid development of my country's petrochemical industry, there is a great demand for various types of large cryogenic spherical tanks for storing liquefied petroleum gas, natural gas, ethylene, and propylene. As the volume of the spherical tank increases, it is required to increase the lower limit of the tensile strength level of the steel plate to reduce the thickness of the spherical shell plate used. In the manufacture of large cryogenic spherical tanks, in addition to the quality requirements for steel plate materials, there are also strict requirements for the performance of supporting welding materials. At present, my country has adopted domestically imported 610MPa low-welding crack-sensitivity high-strength steel plates to manufacture large-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More