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Method for manufacturing a steel component by flash butt welding and a component made by using the method

A technology for butt welding and parts, applied in the direction of manufacturing tools, rotating parts that resist centrifugal force, connections, etc., can solve problems such as adverse effects of physical characteristics of parts

Inactive Publication Date: 2014-12-24
AB SKF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although flash butt welding is a simple and efficient welding technique, due to defects such as weld / quench cracks that occur during and after flash butt welding, and due to the microstructure of the steel in the heat affected zone (HAZ) surrounding the weld joint Altered by flash butt welding, the physical properties of components in the vicinity of their weld joints may be adversely affected by flash butt welding

Method used

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  • Method for manufacturing a steel component by flash butt welding and a component made by using the method
  • Method for manufacturing a steel component by flash butt welding and a component made by using the method
  • Method for manufacturing a steel component by flash butt welding and a component made by using the method

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Embodiment Construction

[0032] Figure 1-4 Various method steps of a method according to an embodiment of the invention are schematically shown. figure 1 Steel 10 is shown, which is forged to produce a steel bar 12 having two opposite ends 12a and 12b. A slab, bloom or billet may be forged from a steel ingot weighing more than 4 tons, more than 10 tons, more than 15 tons, more than 20 tons or heavier. At least one steel rod may be forged or cut from the steel slab, block or billet. A steel billet is a metal segment with a circular or square cross-section of less than 230 cm2. Steel blocks are similar to steel billets, but have a cross-sectional area greater than 230cm2. Slabs are metal segments with a rectangular cross-section. The steel may have the following composition in weight percent (%): C 0.5-1.1, Si 0-0.15, Mn 0-1.0, Cr 0.01-2.0, Mo 0.01-1.0, Ni 0.01-2.0, V and / or Nb ; 0.01-1.0 V or 0.01-1.0 Nb, or both elements are 0.01-1.0, S 0-0.002, P 0-0.010, Cu 0-0.15, Al 0.010-1.0, the remainder ...

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Abstract

Method for manufacturing a steel component (14, 30, 32) having a flash butt welded joint (24), which comprises the step of flash butt welding the weld joint (24) by flashing and upsetting the weld. The method comprises the step of supplying heat (22) to at least the weld joint (24) of said component (14, 30, 32) after the step of upsetting the weld to increase the temperature of the weld joint (24), or to maintain the temperature of the weld joint (24) at an elevated temperature.

Description

technical field [0001] The invention relates to a method for manufacturing components, such as bearing rings, from steel. The invention also relates to parts produced using this method. Background technique [0002] Flash butt welding or "flash welding" is a resistance welding technique used to join segments of metal rails, rods, chains, or pipes in which the segments are aligned end-to-end and electrically charged to create an arc that melts and The ends of the segments are welded, creating an exceptionally strong and smooth joint. [0003] A flash butt welding circuit usually consists of a low voltage high current energy source (usually a welding transformer) and two clamping electrodes. The two segments to be welded are clamped on the electrodes and brought closer together until they meet and lightly touch. Energizing a transformer causes high currents to flow through areas that touch each other. Flashing begins and the segments are forged together with sufficient for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/04C21D9/50F16C33/64
CPCB23K11/04C21D1/42C21D9/40C21D9/50C21D9/505F16C33/64F16C2226/36C22C38/002C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46C22C38/48F16C33/62F16C2204/66F16C2300/14Y10T403/477Y02P10/25B23K11/36
Inventor P.达尔曼V.雷西纳S.拉森
Owner AB SKF