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Welding rod for repairing cold working die cutting edge

A technology for cold-working molds and electrodes, applied in welding media, manufacturing tools, welding equipment, etc., can solve the problems of short service life of mold edges, high mold repair cost, and difficult repair process, and achieve low cost and welding process. Simple and feasible, avoid the effect of mold cracking or deformation

Inactive Publication Date: 2015-01-07
HEILONGJIANG AGRICUTURAL ENGINEARING VOCATIONAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] ①Before welding with electrodes, the base metal needs to be preheated above 300°C, otherwise it is easy to crack. After welding, the surfacing metal has to undergo one or even multiple heat treatments before the surfacing metal can reach the required hardness, resulting in high mold repair costs and difficult repair processes Big, not suitable for grasping;
[0005] ② The service life of the mold cutting edge after welding and repairing with the existing welding rod is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The specific composition of the electrode coating is: 40 kg of marble, 25 kg of fluorite, 5 kg of quartz sand, 2 kg of titanium dioxide, 3 kg of 45# atomized ferrosilicon powder, 6 kg of Ti powder, 3 kg of manganese metal, high carbon chromium 15 kg of iron, 4 kg of FeMo60-A, 6 kg of FeV50-A, 1 kg of FeSiRE23, 0.5 kg of nickel powder. The welding core is made of H08E electrode steel wire, the binder is potassium sodium 3:1 water glass, the modulus of water glass is 3.0, the Baume concentration is 48, and 5‰ potassium permanganate solution is used for passivation. Add the prepared welding rod powder into the mixer, first dry mix for 25 minutes, then add water glass and stir for 30 minutes, take out the evenly mixed powder, and use a 45-ton welding rod press coater to make welding rods. The welding rod drying temperature process is as follows: low temperature 35 ° C for 3 hours, medium temperature 100 ° C for 1.5 hours, high temperature 400 ° C for 1.5 hours. Hardness of...

Embodiment 2

[0022] The specific composition of the electrode coating is: 40 kg of marble, 20 kg of fluorite, 5 kg of quartz sand, 2 kg of titanium dioxide, 3 kg of 45# atomized ferrosilicon powder, 6 kg of Ti powder, 3 kg of manganese metal, high carbon chromium 16 kg of iron, 5 kg of FeMo60-A, 7 kg of FeV50-A, 1 kg of FeSiRE23, 1.5 kg of nickel powder. The welding core is made of H08E electrode steel wire, the binder is potassium sodium 3:1 water glass, the modulus of water glass is 3.0, the Baume concentration is 48, and 5‰ potassium permanganate solution is used for passivation. Add the prepared welding rod powder into the mixer, first dry mix for 25 minutes, then add water glass and stir for 30 minutes, take out the evenly mixed powder, and use a 45-ton welding rod press coater to make welding rods. The welding rod drying temperature process is as follows: low temperature 35 ° C for 3 hours, medium temperature 100 ° C for 1.5 hours, high temperature 400 ° C for 1.5 hours. Hardness of...

Embodiment 3

[0024] The specific composition of electrode coating is: 50 kg of marble, 35 kg of fluorite, 7 kg of quartz sand, 4 kg of titanium dioxide, 3 kg of 45# atomized ferrosilicon powder, 10 kg of Ti powder, 5 kg of manganese metal, high carbon chromium Iron 21 kg, FeMo60-A 6 kg, FeV50-A 8 kg, FeSiRE23 1 kg, nickel powder 2 kg. The welding core is made of H08E electrode steel wire, the binder is potassium sodium 3:1 water glass, the modulus of water glass is 3.0, the Baume concentration is 48, and 5‰ potassium permanganate solution is used for passivation. Add the prepared welding rod powder into the mixer, first dry mix for 25 minutes, then add water glass and stir for 30 minutes, take out the evenly mixed powder, and use a 45-ton welding rod press coater to make welding rods. The welding rod drying temperature process is as follows: low temperature 35 ° C for 3 hours, medium temperature 100 ° C for 1.5 hours, high temperature 400 ° C for 1.5 hours. Hardness of surfacing metal is ...

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Abstract

The invention relates to a welding rod for repairing a cold working die cutting edge. The welding rod comprises a core welding-wire and a coating extruded outside the core welding-wire, wherein the coating contains the following components in parts by weight: 40-50 parts of marble, 20-35 parts of fluorite, 5-7 parts of silica sand, 1-4 parts of titanium dioxide, 3-5 parts of 45# atomized ferrosilicon powder, 6-10 parts of Ti powder, 3-5 parts of manganese metal, 15-25 parts of high carbon ferro-chrome, 4-6 parts of FeMo60-A, 6-8 parts of FeV50-A, 1-2 parts of FeSiRE23 and 0.5-2 parts of nickel powder. According to the welding rod disclosed by the invention, the welding technology is simple and practicable, and a die needs not to be preheated before welding and needs no heat treatment after welding, therefore the die is prevented from possibly cracking or deforming caused by the preheating and heat treatment; the hardness of deposited metal can be larger than or equal to HRC55 without heat treatment after welding, and the deposited metal has no cracks, therefore the welding rod is applicable to the field welding operation; and the service life of the cutting edge after welding can be 1-2 times or 2-3 times as long as the service life of the cutting edge of the prior die, so that the manufacture time of the die is greatly shortened.

Description

technical field [0001] The invention relates to a welding rod, in particular to a welding rod used for repairing the cutting edge of a cold working die. Background technique [0002] Cold working dies are widely used in various fields of mechanical production, and cold forming of metal or non-metal is mostly completed by cold working dies. Cold work dies are subjected to different stresses such as stretching, bending, compression, impact, and fatigue during service, while dies used for metal cold extrusion, cold pier, and cold stretching must also withstand alternating temperatures of about 300°C Function, in the traditional mold manufacturing process, the cold mold is made of carbon tool steel or alloy tool steel as a whole. During use, if the cutting edge of the mold is slightly defective (cracks, collapse, wear, etc.), the entire mold will be scrapped. The use of welding to repair damaged cold-work die cutting edges has the characteristics of short cycle, low cost, low ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/365B23K35/40
Inventor 马春雷王新年侯忠义宁亮亮赵娜张振华
Owner HEILONGJIANG AGRICUTURAL ENGINEARING VOCATIONAL COLLEGE