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

Dissimilar material weld joint formed by joining iron type material and aluminum type material, and weld joining method

A technology for welding joints and heterogeneous materials, applied in the direction of welding/welding/cutting items, welding equipment, laser welding equipment, etc., can solve problems such as cracks, and achieve easy joint formation, excellent joint strength, high joint strength and ductility Effect

Inactive Publication Date: 2005-12-14
KOBE STEEL LTD
View PDF2 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] One of the main reasons why various methods such as those mentioned above are proposed in the case of joining steel and aluminum is that when the steel and aluminum are melted and joined directly to each other, brittle intermetallic compounds are formed at the weld and cracks may occur

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
  • Dissimilar material weld joint formed by joining iron type material and aluminum type material, and weld joining method
  • Dissimilar material weld joint formed by joining iron type material and aluminum type material, and weld joining method
  • Dissimilar material weld joint formed by joining iron type material and aluminum type material, and weld joining method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0096] The present inventors placed steel plates in which voids (holes) were formed according to the present invention (from mild steel sheet SPCE to high-strength steel plates up to 980MPa) on aluminum alloy plates (A5182), and lap-welded them using various aluminum welding wires test, whereby a dissimilar material welded joint is prepared, and then the dissimilar material welded joint is evaluated.

[0097] In Table 1, conditions (grade and thickness), wire conditions (grade), welding conditions (current, voltage and welding speed), pore conditions (shape and parameter P value), evaluation results (presence of bead cracking and tensile strength and elongation of the joint) and others. Here, AC power is used for all welding. Then, in order to facilitate the test for evaluating the present invention, a circular shape was adopted as the pore shape formed in all ferrous materials, and the pore diameter was used as a size parameter.

[0098] The aluminum alloy steel plate and t...

Embodiment 2

[0111] The present inventors used an AC power source and various aluminum welding wires under various heat output conditions by arc welding, by joining the steel sheets shown in Table 2 ("GA" in the "Type" column means hot-dip galvanized steel sheet) ) and aluminum alloy plates to prepare welded joints. In this steel sheet, circular voids (2R, R denoting circular equivalent radii) with diameters shown in Table 2 were previously formed at intervals (length of non-void portion) shown in Table 2. In arc welding, Ar gas (flow rate of 20-25 l. / min.) is used as shielding gas. The angle of the welding torch was set at 80°. Here, the Mg content in the aluminum welding wire used here is as follows; 0.05% or less (for A4043-WY), 4.3 to 5.2% (for A5183-WY), 4.5 to 5.5% (for A5356-WY) and 2.4 to 3.2% (for A5554-WY).

[0112] The prepared welded joints were visually inspected to determine the presence of weld cracks, and the weld strength of the welded joints was measured. Weld cracks ...

Embodiment 3

[0120] The present inventors used a DC power source and various aluminum welding wires under various heat output conditions by arc welding, by joining the steel sheets shown in Table 4 ("GA" in the "Type" column means hot-dip galvanized steel sheet) ) and aluminum plate to prepare welded joints. In these steel sheets, circular pores (2R, R denoting circular equivalent radii) having diameters shown in Table 4 were formed in advance at intervals (lengths of non-void portions) shown in Table 4. In arc welding, Ar gas (flow rate of 20-25 l. / min.) is used as shielding gas. The angle of the welding torch was set at 80°.

[0121] The prepared welded joints were visually inspected to judge the presence of weld cracks, and the welding strength of the welded joints was measured in the same manner as in Example 2. The results obtained are shown in Table 5.

[0122] It can be clearly seen from Table 4 and Table 5 that in the case of DC power supply, when the welding conditions (heating...

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

No PUM Login to View More

Abstract

Disclosed are a welded joint of dissimilar materials and a welding method for stably producing the joint. The joint is formed by joining iron-based materials and aluminum-based materials, and it has not only high strength but also excellent ductility. A dissimilar material welded joint 1 formed by joining a ferrous material 2 and an aluminum-based material 3, wherein: pores 4a are formed in advance at predetermined intervals along a welding line 6 on the side of the ferrous material 2; and aluminum-type materials are welded so that said pores 4a are filled with molten aluminum 7; and the ratio (L-Al) / (L-Fe) of length (L-Al) to length (L-Fe) is minimum The value is 0.5-7, wherein (L-Al) is the length of the aluminum-based welding material 10 used to fill the pores 4a along the welding line 6 on the longitudinal section, and (L-Fe) is the The ferrous material 2 adjacent to the pores 4a filled with the aluminum-based welding material 10 is along the length of the welding line 6 on the longitudinal section containing the welding line 6; the length ( Both (L—Al) and (L—Fe) are lengths per 100 mm of the length of the welding line 6 formed after welding.

Description

Background technique [0001] The present invention relates to a welded joint of dissimilar materials formed by joining iron-based materials and aluminum-based materials and a welding method, the welded joint of dissimilar materials is suitable for transportation vehicles such as automobiles and railway vehicles; machine parts; structural members such as building structures, etc., Dissimilar material welded joints are especially required when producing automotive equipment. [0002] If it is possible to join members of dissimilar metals including iron-based materials (hereinafter referred to as "steel materials") and aluminum-based materials (a general term for pure aluminum and aluminum alloys, hereinafter referred to as "aluminum materials") (joining of dissimilar materials), then This engagement obviously contributes to weight reduction and the like. However, when steel materials are welded to aluminum materials, brittle intermetallic compounds may be formed at the weld seam...

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): B23K9/23B23K26/32B23K33/00
CPCB23K9/232B23K26/32B23K33/004B23K26/323B23K2103/18B23K2103/20B23K2103/50Y10T428/12347Y10T428/12757B23K2103/10
Inventor 武田实佳子松本克史杵渕雅男中川知和福本幸司武田裕之村井康生
Owner KOBE STEEL LTD
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