Composition, coating, q690 coating-free bridge steel welding rod and preparation method thereof

A bridge steel and coating-free technology, which is applied in the field of materials, can solve the problems of not meeting the welding strength requirements of Q690 coating-free bridges, etc., and achieve good welding process performance and mechanical properties, satisfying mechanical properties, and strong stability.

Active Publication Date: 2022-03-11
ATLANTIC CHINA WELDING CONSUMABLES
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the tensile strength Rm (MPa): ≥ 600 and the yield strength Rp0.2 (MPa): ≥ 500 of the above welding rod cannot meet the welding strength requirements of Q690 coating-free bridge steel.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composition, coating, q690 coating-free bridge steel welding rod and preparation method thereof
  • Composition, coating, q690 coating-free bridge steel welding rod and preparation method thereof
  • Composition, coating, q690 coating-free bridge steel welding rod and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0051] According to another typical embodiment of the present invention, a kind of preparation method of said Q690 bridge steel welding rod for exempting from painting is provided, such as figure 1 As shown, the method includes:

[0052] S1, obtaining the composition;

[0053] S2, mixing the adhesive liquid with the composition to obtain a mixed liquid;

[0054] S3. Coating the mixed solution on the welding core and then baking to obtain the Q690 coating-free bridge steel welding rod.

[0055] In this embodiment,

[0056] In the step S2, the mass ratio of the composition to the binding liquid is 100:20-24; if the ratio is too low, the wet powder is dry, the eccentricity of the production process is not easy to control, the coating is tight, and the alloy The elements will increase; if it is too high, the wet powder is too wet, and the production pressure is not enough, resulting in a low survival rate of the finished product.

[0057] The bonding liquid is water glass.

...

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
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses a composition, a coating, Q690 bridge steel welding rod for coating free and a preparation method thereof. The component mass fraction of the composition is: CaCO 3 : 9.5~11.5%, CaF 2 : 4~5%, TiO 2 : 1~2%, SiO 2 : 1~2%, Mn: 1.25~1.5%, ferrosilicon powder 0.8~1.20%, ferromolybdenum powder 0.6~0.675%, C: 0.025~0.05%, Cr: 0.05~0.50%, Cu: 0.2~0.3%, Fe: 1.3~1.5%, Na 2 CO 3 : 0.1-0.15%, CMC: 0.1-0.15%, sodium alginate 0.15-0.20%, Ni 1.7-1.9%. The coating is formed by coating and curing the composition; the welding rod includes a welding core and a coating coated on the surface of the welding core; the welding rod has good welding performance and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a composition, a coating, a Q690 coating-free bridge steel welding rod and a preparation method thereof. Background technique [0002] At present, the steel truss girder is made of conventional bridge steel, which needs to be painted, and will need to be repainted every few years for maintenance. The coating process and the peeling off of the original paint film inevitably lead to the pollution of the water source of the reservoir. The use of coating-free can avoid the pollution of the environment during coating and re-coating, and solve the protection of the water source of the reservoir well. [0003] In the United States, the construction of paint-free weathering steel bridges began in 1964, and about 45% of the steel bridges are made of paint-free weathering steel. Up to now, there are more than 23,000 paint-free weathering steel bridges. Japan began to build paint-free w...

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 Patents(China)
IPC IPC(8): B23K35/30B23K35/365B23K35/40
CPCB23K35/3073B23K35/365B23K35/404B23K35/3602B23K35/0272
Inventor 朱宇霆张克静蒋勇
Owner ATLANTIC CHINA WELDING CONSUMABLES
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