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A joint welding method between yg8 hard alloy tip and 40cr structural steel tip shank

A cemented carbide, welding method technology, applied in welding equipment, non-electric welding equipment, metal processing equipment and other directions, can solve the problems of low quality stability, large differences in chemical properties, hardened structure and cracks, etc., to achieve welding time Short, narrow heat-affected zone, effective in solving cracks

Active Publication Date: 2021-07-20
重庆英杰贝尔机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large difference in physical and chemical properties of these two materials, the weldability is very poor, and hardened structures and cracks are easily produced.
The traditional welding method generally adopts brazing, which will generate a lot of stress in the cooling process after brazing, which is easy to cause cracks in the cemented carbide, high energy consumption, large pollution, low efficiency, and low quality stability

Method used

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  • A joint welding method between yg8 hard alloy tip and 40cr structural steel tip shank

Examples

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Effect test

specific Embodiment approach

[0021] A joint welding method between a YG8 cemented carbide tip and a 40Cr structural steel tip shank, characterized in that the welding method comprises the following steps:

[0022] Pre-treat the 40Cr structural steel tip handle 3 and the transition layer metal material 2 to be welded, so that the welding surface of the 40Cr structural steel tip handle 3 forms a step hole 7, and clamp the YG8 hard alloy tip 1 to the rotating fixture 6, 40Cr The top handle 3 of the structural steel is clamped by the moving fixture 4, and the metal material 2 of the intermediate transition layer is placed in the step hole 7 on the welding surface of the top handle 3 of the 40Cr structural steel; the inertia friction welding is started, and the welded product is heat treated . Among them, the above-mentioned pretreatment process for the 40Cr structural steel tip handle 3 and the intermediate transition layer metal material 2 is: processing the 40Cr structural steel tip handle 3 so that the are...

Embodiment 1

[0040] A joint welding method of a YG8 hard alloy tip and a 40Cr structural steel tip shank comprises the following steps: a YG8 tungsten carbide tip with a diameter of 24mm and a matching 40Cr structural steel tip shank are selected for the weldment,

[0041] Pretreatment: Install the flywheel, rotating fixture and moving fixture, select the YG8 carbide tip with a diameter of 24mm, and process the 40Cr structural steel tip handle 3 and the previous transition layer metal material 2 to be welded to make the 40Cr structural steel tip handle 3 A stepped hole 7 is formed on the welding surface, and a plurality of uniformly distributed small holes 8 are arranged at the bottom of the stepped hole 7 . A plurality of small holes 8 are arranged in a ring around the small hole arranged in the center of the stepped hole 7 . The area of ​​the transition layer metal material 2 is equal to the area of ​​the step hole 7 in the 40Cr structural steel tip handle 3, the welding surface size of ...

Embodiment 2

[0045] A joint welding method of a YG8 hard alloy tip and a 40Cr structural steel tip shank comprises the following steps: a YG8 tungsten carbide tip with a diameter of 24mm and a matching 40Cr structural steel tip shank are selected for the weldment,

[0046] Pretreatment: Install the flywheel, rotating fixture and moving fixture, select the YG8 carbide tip with a diameter of 24mm, and process the 40Cr structural steel tip handle 3 and the intermediate transition layer metal material 2 to be welded to make the 40Cr structural steel tip handle 3 A stepped hole 7 is formed on the welding surface, and a plurality of uniformly distributed small holes 8 are arranged at the bottom of the stepped hole 7 . A plurality of small holes 8 are arranged in a ring around the small hole arranged in the center of the stepped hole 7 . The area of ​​the transition layer metal material 2 is equal to the area of ​​the step hole 7 in the 40Cr structural steel tip handle 3, the welding surface size...

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Abstract

Aiming at the problems of YG8 cemented carbide tip and 40Cr structural steel tip handle, the physical and chemical properties of the two materials are greatly different, the weldability is poor, and the hardened structure and cracks are easily generated. The present invention provides a YG8 cemented carbide tip with The joint welding method of 40Cr structural steel tip shank, the welding method uses inertia friction welding technology, and includes the following steps: preprocessing the 40Cr structural steel tip shank and transition layer metal material to be welded, so that the 40Cr structural steel tip shank is welded. A stepped hole is formed on the welding surface, and the transition layer metal material is placed in the stepped hole on the welding surface of the 40Cr structural steel tip shank; inertia friction welding is started, and the welded product is heat treated. The invention adopts the inertia friction welding technology, the instantaneous temperature rise of welding is fast, the welding time is short, the heat-affected zone is narrow and the structure is not coarsened obviously, and the deterioration of the joint structure and the generation of brittle phase are avoided to a great extent.

Description

technical field [0001] The invention relates to the technical field of inertial friction welding, in particular to a joint welding method of a YG8 cemented carbide tip and a 40Cr structural steel tip handle. Background technique [0002] YG8 cemented carbide materials are often welded to 40Cr structural steel. The main component of YG8 cemented carbide is tungsten carbide particles, 8% cobalt is added as a binder, and its density is 14.5g / cm 3 , the hardness is HRC79, and the linear expansion coefficient is 1 / 3 of 40Cr structural steel. Due to the large difference in physical and chemical properties of these two materials, the weldability is very poor, and hardened structures and cracks are easily produced. The traditional welding method generally uses brazing, which will generate a lot of stress during the cooling process after brazing, which will easily cause cracks in the cemented carbide, high energy consumption, large pollution, low efficiency, and low quality stabilit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/24B23K20/12B23K20/26
CPCB23K20/12B23K20/129B23K20/24B23K20/26
Inventor 周跃宏
Owner 重庆英杰贝尔机械制造有限公司
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