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Welding process for mold tungsten steel core rod

A welding process, tungsten steel technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of easy to burst, difficult to process, high price of tungsten steel, etc., to achieve simple welding process operation, reduced processing costs, and reduced processing procedures Effect

Inactive Publication Date: 2015-03-25
TAICANG JINLIDE POWDER METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high hardness of tungsten steel, the integral mandrel has no certain elasticity in actual use, and is easy to break and burst
In addition, tungsten steel has the characteristics of high price and difficult processing, resulting in the cost of integral mandrels being higher than that of mold steel mandrels and split mandrels.

Method used

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  • Welding process for mold tungsten steel core rod

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The welding process of the mold tungsten steel mandrel of the present embodiment comprises the following steps:

[0021] (1) Pretreatment, process a V-shaped groove on the welding end of the carbon steel part 3, and process a V-shaped groove on the welding end of the tungsten steel mandrel 1, that is, it can be inserted into the V-shaped groove V-shaped convex part. In order to obtain a stronger welding effect, the included angle of the V-shaped groove is 70°-100°, specifically 85° in this embodiment, and the V-shaped groove and the V-shaped convex portion respectively have left-right symmetrical structures.

[0022] (2) Welding, pre-fill the welding material 2 at the interface between the carbon steel part 3 and the tungsten steel core rod 1, heat with an oxygen gun, first heat the welding end of the carbon steel part 3 to orange, and then heat the tungsten steel core Solder end of rod 1. Heat the welding material 2 with the waste heat of heating the carbon steel par...

Embodiment 2

[0027] The difference between this embodiment and Embodiment 1 is that the structure of the welding material used during welding—the welding wire is: the welding wire includes a welding core and an outer skin wrapped around the welding core, and the welding core accounts for 18% of the total weight of the welding wire. The proportion of each component in the total weight of the welding wire is 2.5% of sodium fluoride, 0.4% of ferrosilicon, 0.02% of ferromolybdenum, 0.5% of high carbon ferrochrome, 0.8% of nickel powder, 0.3% of cryolite, and 12% of iron powder. Diboron trioxide is 0.3%, and the rest is titanium dioxide.

[0028] In this embodiment, the welding process of the mold tungsten steel mandrel is the same as that in Embodiment 1.

Embodiment 3

[0030] The difference between this embodiment and Embodiment 1 is that the structure of the welding material used during welding—the welding wire is: the welding wire includes a welding core and an outer skin wrapped around the welding core, and the welding core accounts for 20% of the total weight of the welding wire. The proportion of each component in the total weight of the welding wire is 3.0% of sodium fluoride, 0.45% of ferrosilicon, 0.03% of ferromolybdenum, 1.0% of high carbon ferrochrome, 1.2% of nickel powder, 0.6% of cryolite, and 15% of iron powder. Diboron trioxide is 0.35%, and the rest is titanium dioxide.

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Abstract

The invention relates to a welding process for a mold tungsten steel core rod. The welding process comprises the following steps that (1) preprocessing is carried out, a V-shaped groove is machined in a welded end of a carbon steel piece, and a V-shaped convex portion matched with the V-shaped groove is machined at the welded end of a tungsten steel core rod; (2) welding is carried out, the space between the V-shaped groove and the V-shaped convex portion is filled with welding materials, the welded end of the carbon steel piece is firstly heated to be of the tangerine color, then the welded end of the tungsten steel core rod is heated, heating is stopped when the welding materials completely become liquid, and the carbon steel piece and the tungsten steel core rod are welded together through the welding materials to form a welded piece; (3) after-treatment is carried out, and the mold tungsten steel core rod is obtained. The welding process for the mold tungsten steel core rod is simple in operation, and the obtained mold tungsten steel core rod is low in manufacturing cost and long in service life.

Description

technical field [0001] The invention relates to a welding process, in particular to a welding process for a mold tungsten steel mandrel. Background technique [0002] At present, the tungsten steel mandrel is integral, that is, the whole mandrel is made of tungsten steel material, so that the mandrel can reflect the characteristics of high hardness and wear resistance of tungsten steel during molding and use. However, due to the high hardness of tungsten steel, the integral mandrel has no certain elasticity in actual use, and is easy to break and burst. In addition, tungsten steel has the characteristics of high price and difficult processing, resulting in the cost of the integral mandrel being higher than that of the mold steel mandrel and the split mandrel. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a welding process for mold tungsten steel mandrel with low production cost in view of the current technical...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02B23K35/30
CPCB23K5/16B23K5/213B23K35/0266B23K35/3608B23K2103/18
Inventor 杨立冬杨锦明
Owner TAICANG JINLIDE POWDER METALLURGY
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