Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

700 MPa high-strength gas-retaining welding wire for low-cost engineering machinery and manufacturing method thereof

A manufacturing method and technology of gas shielded welding, applied in the direction of manufacturing tools, welding media, welding equipment, etc.

Inactive Publication Date: 2019-12-31
MCC BAOSTEEL TECH SERVICE
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A large number of existing patents and technical documents only explain how to realize the strength, low-temperature toughness and weldability of welded joints, and how to ensure smooth production and drawing of welding wire from the perspective of steelmaking and high-speed rolling technology is still blank, and it does not involve how to ensure How to reduce the alloying elements of welding wire and optimize the steelmaking process to reduce the production cost of welding wire while maintaining the strength of weld metal and resistance to delayed cracking

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
  • 700 MPa high-strength gas-retaining welding wire for low-cost engineering machinery and manufacturing method thereof
  • 700 MPa high-strength gas-retaining welding wire for low-cost engineering machinery and manufacturing method thereof
  • 700 MPa high-strength gas-retaining welding wire for low-cost engineering machinery and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] According to the mass percentage of the elements in the welding wire provided in the present invention, after the elements are mixed, smelting and casting, billet heating, rolling, and cooling are carried out in sequence according to the welding consumable production process to form a wire rod, and then the wire rod is sequentially pickled and drawn. Pulling, copper plating, and layer winding, the required gas shielded welding wire samples 1#-5# can be obtained. The mass percentages of elements in gas shielded welding wire samples 1#-5# are shown in Table 1 below. The technological conditions of billet heating are shown in Table 2, the technological conditions of rolling and cooling are shown in Table 3, and the technological conditions of aging softening, pickling, drawing and copper plating are shown in Table 4.

[0066] Table 1 Composition of gas shielded welding wire (Wt%)

[0067]

[0068] Table 2

[0069] Wire No. Billet Heating Temperature (°C ...

Embodiment 2

[0075] Weld the obtained gas shielded welding wire samples 1#-5# with the GMAW welding method to the test plate with a thickness of 30mm of the brand BWELDY620QL4, and the test plate should be quenched and tempered offline (that is, RQ+T). ℃×2hr hydrogen elimination heat treatment, stress relief heat treatment is not recommended. The specific welding conditions are shown in Table 5.

[0076] table 5

[0077]

[0078] After welding, the samples 1#-5# were subjected to the mechanical property test of the deposited metal, and the existing welding wire was taken to perform the mechanical property test of the deposited metal. The test results are shown in Table 6. Among them, the existing welding wire is prepared by LF (Ladle Furnace) + VD process; the composition is Ni (nickel): 0.80-1.40%; Mo (molybdenum): 0.35-0.55%. The tensile sample is a round bar; the location of the tensile and impact samples is at the center of the weld. It can be seen from Table 6 that the yield rat...

Embodiment 3

[0090] The welding wire in the present invention and the billet used in the existing welding wire are pickled and corroded, and the low-magnification structure diagrams of the two are respectively obtained. For details, see figure 1 , 2 . Depend on figure 1 , 2 It can be seen that, according to the rating of YB / T 4002-2013, the central segregation of the welding wire of the present invention is ≤1.0 level, and the central shrinkage cavity is ≤0.5 level; the central segregation of the existing welding wire is ≤1.5 level, and the central shrinkage cavity is ≤1.0 level. It shows that the welding wire in the present invention is superior to the existing welding wire in terms of billet low-fold quality.

[0091] The metallographic sample prepared by grinding, corroding and drying the wire rod used in the present invention and the existing welding wire is obtained under an optical microscope at 500 times magnification respectively to obtain the microstructure diagrams of the two,...

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
Dry elongationaaaaaaaaaa
Login to View More

Abstract

The invention provides a 700 MPa high-strength gas-retaining welding wire for low-cost engineering machinery. The 700 MPa high-strength gas-retaining welding wire is prepared from, by mass, 0.06%-0.10% of C, less than or equal to 0.60% of Si, 1.40%-1.80% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.60%-0.80% of Ni, 0.10%-0.40% of Cr, 0.15%-0.45% of Mo, 0.06%-0.12%of Ti and the balance Fe (iron) and unavoidable impurities. According to the 700 MPa high-strength gas-retaining welding wire for low-cost engineering machinery and the manufacturing method, a low-C-high-Mn(low Ni and low Mo alloying)-Ti micro-alloyed component system is adopted as a basis, and the steel making and rolling processes are optimized, so that the weld joint has high strength, the low-temperature toughness, the cold forming property, the weldability and the anti-fatigue impact load characteristic are also excellent, and the contradiction between high strength and excellent cold forming property is successfully solved.

Description

technical field [0001] The invention belongs to the technical field of welding materials and relates to a gas-shielded welding wire, in particular to a 700MPa high-strength gas-shielded welding wire for engineering machinery with low cost, low yield ratio and high performance and a manufacturing method thereof. Background technique [0002] As we all know, low-carbon low-alloy high-strength gas-shielded welding wire is one of the most important welding materials for engineering structures. It is widely used in construction machinery manufacturing, boiler pressure vessels, automobile industry and bridge building structures with matching low-carbon low-alloy high-strength modulated steel plates. middle. At present, the performance of welded joints depends not only on the chemical composition and welding process of the welding wire, but also on the chemical composition and manufacturing process of the supporting steel plate. The most important performance of the joint is ultim...

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
IPC IPC(8): B23K35/30B23K35/40B23K9/173B23K33/00B23K35/38
CPCB23K9/173B23K33/004B23K35/0261B23K35/3073B23K35/383B23K35/40
Inventor 吴勇张显辉李开添王文龙贾军李好生张化朱达
Owner MCC BAOSTEEL TECH SERVICE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com