Method for producing welding materials by using offcut of steel plate

A technology of welding materials and scraps, applied in the direction of welding/cutting media/materials, welding equipment, welding media, etc., can solve the problems of large degree of restraint, low ambient temperature, impact toughness and crack resistance, etc., to increase the transition coefficient, The effect of reducing production costs and reducing manufacturing costs

Active Publication Date: 2007-04-18
TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP
View PDF2 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steel plate is thick, the joint forms are various, the degree of restraint is large, the operating environment temperature is low, and various welding requirements such as high impact toughness and crack resistance of the welded joints are to be achieved. Currently, the commonly used welding materials are difficult to meet; therefore, adapting to Welding rods and welding wires with special properties for these needs need to be developed urgently, especially welding wires suitable for automatic welding.

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 (manufacture of high-strength, high-toughness gas shielded welding wire):

[0033] The composition design of high-strength and high-toughness welding wire aims at low carbon, cleanliness, and microalloying. The adjustment principles of the chemical composition (mass%) of the deposited metal are as follows:

[0034] C 0.05~0.10: C is the main element to adjust the strength of the weld metal, and a certain C content must be ensured in the welding wire. When the C content is within a certain range, with the increase of C content, the arc stability is improved, the droplet transfer characteristics are improved, and the welding wire process performance is improved. However, too much C content will increase the hardenability and crack sensitivity of the weld metal, and reduce the plasticity. Therefore, the range of C content in the welding wire is set at 0.05-0.10.

[0035] Si 0.2~1.0: In the gas shielded welding wire, Si is the main deoxidizing element, and Si...

Embodiment 2

[0046] Embodiment 2 (manufacture of high-strength, high-toughness welding rod):

[0047] The plate edge of low-carbon microalloy steel with a tensile strength of 610MPa is selected, and its chemical composition is (mass%): 0.09%C, 1.47%Mn, 0.22%Si, 0.26%Ni, 0.18%Mo, 0.042%V, 0.016% Ti, 0.002% S, 0.007% P.

[0048] Place the edge of the above plate in a common heating furnace and heat it to 1200°C for 40 minutes. The furnace temperature is controlled at 1120-1160°C, and then hot rolling is carried out. In the temperature range from the furnace temperature to 1000°C, the billet is roughly rolled to a diameter of 10mm; in the temperature range of 930-850°C, it is further hot-rolled to a diameter of 8.5mm; in the temperature range of 850-820°C, it is finished rolled to a diameter of 6.5mm; and then Then use the conventional resistance butt welding process to connect them, that is, to make the wire rod.

[0049] The welding core is made from the wire rod according to the convent...

Embodiment 3

[0052] Embodiment 3 (manufacture of high-strength, high-toughness submerged arc welding wire):

[0053] The chemical composition of the plate head and plate edge used in the production of wire rod is (mass%): 0.07%C, 0.28%Si, 1.55%Mn, 0.014%Ti, 0.22%Mo, 0.25%Ni, 0.011%P, 0.004% S, 0.2% Cu.

[0054] The chemical composition (mass%) of the designed submerged arc welding wire is: 0.08%C, 0.23%Si, 1.80%Mn, 0.15%Ti, 0.62%Mo, 0.22%Ni, 0.014%P, 0.008%S, 0.18%Cu.

[0055] The specific implementation method is, first put 20 kg of leftover material into the induction melting furnace, melt it in the shortest time, and then add flux 431, the amount added is based on the principle of forming a 2-3 mm thick liquid slag protective layer on the surface of molten steel.

[0056] Then add the remaining plate head, plate edge and ferromolybdenum (containing 55% Mo) with a total mass of 0.78% of all charges into the induction melting furnace, melt for 10 to 15 minutes after melting, and then add...

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

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

A technology for using the leftover of steel plate to prepare the welding material includes such steps as choosing the leftover of steel plate, hot rolling and butt welding to obtain coiled rod, or adding alloying element and smelting to obtain coiled rod, cold drawing, slitting, straightening, and coating chemical flux to obtain welding electrodes, or cold drawing and plating copper to obtain welding wire.

Description

technical field [0001] The invention relates to a method for producing welding materials, in particular to a method for producing welding materials by using scraps of steel plates. Background technique [0002] Welding is an important processing technology for steel materials. Although a variety of welding methods have been developed, the welding method widely used in production is still arc welding, such as electrode arc welding, gas shielded welding, submerged arc welding, etc. The welding materials used in arc welding include welding rod, welding wire, flux, shielding gas, etc. Among them, welding wire is divided into two types: solid welding wire and flux-cored welding wire. Due to the complicated production equipment and high technical requirements of flux-cored welding wire, its cost High or low, resulting in certain restrictions on its application. Therefore, welding rods and solid wires have become the most consumed welding materials at present, and their applicatio...

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

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40B23K35/30C22C38/54C22C38/58C21D9/70C21D11/00B21B37/16B21B37/74B23K11/00C22C33/04B21C1/02
Inventor 孙俊生孙逸群
Owner TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap