900MPa high-strength loop chain pulse flash butt welding process

A flash butt welding, 900mpa technology, applied in the direction of welding equipment, manufacturing tools, resistance welding equipment, etc., to achieve the effect of suppressing the tendency of hardening and cold cracking, high performance and good fusion

Active Publication Date: 2019-04-26
SHANDONG JINHENGLI CONTROL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some difficulties for higher strength link chain welding

Method used

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  • 900MPa high-strength loop chain pulse flash butt welding process
  • 900MPa high-strength loop chain pulse flash butt welding process
  • 900MPa high-strength loop chain pulse flash butt welding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] The steel for the ring chain is SAE8620H high-strength steel, and the specification is The high-strength ring chain is used for pulse flash butt welding, and the pulse flash butt welding machine is used for welding.

[0051] The specific welding process steps are as follows:

[0052] Process the SAE8620H bar to length on the Jh23-100 model punch After being annealed at 600℃×4h, put it into the BFBL-40-2A ring weaving machine, and then press it into a ring, and control the opening size of the ring interface. The inner ring is 0.5~1mm, and the outer ring is 2~ 4mm, the size structure diagram is as follows figure 1 shown.

[0053] Put the finished ring chain into the medium frequency induction heating furnace and heat it to 180-190°C, and the preheated ring chain is transported to the pulse flash butt welding machine through the auxiliary conveying device. It is sent to the flash butt welding station to be welded by a mechanical device, positioned and clamped to ente...

Embodiment 2

[0057] For specifications Pulse flash butt welding of the 900MPa high-strength link chain. The ring chain steel is 23MnNiMoCr54, which is welded by pulse flash welding machine.

[0058] The specific flash butt welding process steps are as follows:

[0059] The 23MnNiMoCr54 bar is processed into a 490±1.0mm bar on a Jh23-100 type punch, and after annealing at 620°C×4h, it is put into the BFBL-40-2A automatic ring weaving machine, and then the ring is automatically weaved. Control the opening size of the ring after weaving, the inner ring is 0.8~1.2mm, and the outer ring is 2.5~4.5mm.

[0060] Put the shot blasted ring chain into the medium frequency induction heating furnace and heat it to 190-200°C, and the preheated ring chain is transported to the pulse flash welding machine through the auxiliary conveying device. It is sent to the flash butt welding station to be welded by a mechanical device, positioned and clamped to enter the pulse flash butt welding stage. The proc...

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Abstract

The invention relates to a 900MPa high-strength loop chain pulse flash butt welding process. The 900MPa high-strength loop chain pulse flash butt welding process comprises the steps that a 900MPa loopchain bar is sequentially subjected to ring weaving, surface treatment and preheating treatment after being subjected to annealing treatment; pulse flash butt welding, upsetting and pressure maintaining are performed on the preheated loop chain bar; pre-stretching and quenching-tempering heat treatment are carried out on the welded loop chain bar. Pulse current is superposed on average welding current to achieve the pulse in the pulse flash butt welding process, and meanwhile pulse pressure is applied. By the adoption of the 900MPa-level high-strength loop chain flash welding process, a flashbutt welding head which is flat in surface, free of welding cracks and inclusions and capable of meeting the using requirement can be obtained under the conditions of low splashing and high efficiency.

Description

technical field [0001] The invention belongs to the field of welding technology, in particular to a method for flash butt welding of 900MPa high-strength ring chains. Background technique [0002] High-strength steel link chains are widely used in mining machinery, marine ships and military ships because of their large load-carrying capacity, reliable operation, convenient disassembly and assembly, and excellent transmission performance. But regardless of the working environment of coal mine or ocean, its service conditions are poor, requiring high wear resistance, corrosion resistance, high strength and fatigue life. The common welding method of high-strength steel chain is flash butt welding. Flash butt welding is a discontinuous process influenced by multiple parameters. The parameters such as welding current and pressure at each stage will affect the welding quality. The high performance of the 900MPa high-strength link chain has higher requirements for the selection of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K11/04
CPCB23K11/04B23K11/046
Inventor 张占峰李亚江张国峰李行朱培友单光石梁莉莉
Owner SHANDONG JINHENGLI CONTROL CO LTD
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