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Self-protection flux-cored wire for strengthening surface of large hot-forging die and production method of self-protection flux-cored wire

The technology of flux-cored wire and hot forging die is applied in the field of welding material manufacturing, which can solve the problems of wear, deformation, and short service life of large hot forging die, and achieve the effect of improving hardness and strength and improving service life.

Active Publication Date: 2017-09-19
CHONGQING JIEPIN TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide a self-protecting drug core wire used for surface strengthening of large hot forging dies, and to solve the problem of cavity surface layer of existing large hot forging dies. The area is worn, deformed and cracked under extreme conditions with a temperature of 500-700°C and a load of more than 40,000 tons, resulting in technical problems such as extremely short service life of large hot forging dies; at the same time, a method for large hot forging Preparation method of self-protecting drug core wire material with mold surface strengthening

Method used

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  • Self-protection flux-cored wire for strengthening surface of large hot-forging die and production method of self-protection flux-cored wire
  • Self-protection flux-cored wire for strengthening surface of large hot-forging die and production method of self-protection flux-cored wire
  • Self-protection flux-cored wire for strengthening surface of large hot-forging die and production method of self-protection flux-cored wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1) Dry the raw materials chromium, molybdenum, tungsten, nickel, silicon, manganese, niobium, carbon, phosphorus, sulfur and cobalt at 120°C for 1 hour respectively, and use 80-mesh sieves to sieve the dried raw materials respectively, Preserve the sieved raw materials in an environment of 80°C for later use;

[0022]2) Weigh the raw materials of the drug core wire drug core according to the following proportions: chromium element content 28%, molybdenum element content 9%, tungsten element content 2.4%, nickel element content 2%, silicon element content 1%, manganese element content 0.8%, niobium element content 0.23%, carbon element content 1.4%, phosphorus element content 0.01%, sulfur element content 0.01%, and the balance is cobalt. Add the weighed raw materials into the mixer and mix for 2 hours to obtain the drug core powder ;

[0023] 3) Obtain the H08A steel strip for ultrasonic cleaning and drying, process the cross section of the H08A steel strip into a U-sh...

Embodiment 2

[0029] 1) Dry the raw materials chromium, molybdenum, tungsten, nickel, silicon, manganese, niobium, carbon, phosphorus, sulfur and cobalt at 120°C for 1 hour respectively, and use 80-mesh sieves to sieve the dried raw materials respectively, Preserve the sieved raw materials in an environment of 80°C for later use;

[0030] 2) Weigh the raw materials of the drug core wire drug core according to the following proportions: chromium element content 26%, molybdenum element content 8%, tungsten element content 1.8%, nickel element content 1.5%, silicon element content 0.8%, manganese element content 0.6%, niobium element content 0.15%, carbon element content 1.2%, phosphorus element content 0.01%, sulfur element content 0.01%, and the balance is cobalt. Add the weighed raw materials into the mixer and mix for 2 hours to obtain the drug core powder ;

[0031] 3) Obtain the H08A steel strip for ultrasonic cleaning and drying, process the cross section of the H08A steel strip into a...

Embodiment 3

[0037] 1) Dry the raw materials chromium, molybdenum, tungsten, nickel, silicon, manganese, niobium, carbon, phosphorus, sulfur and cobalt at 120°C for 1 hour respectively, and use 80-mesh sieves to sieve the dried raw materials respectively, Preserve the sieved raw materials in an environment of 80°C for later use;

[0038] 2) Weigh the raw materials of the drug core wire drug core according to the following proportions: chromium element content 30%, molybdenum element content 10%, tungsten element content 3%, nickel element content 2.5%, silicon element content 1.2%, manganese element content 1.0%, niobium element content 0.3%, carbon element content 1.6%, phosphorus element content 0.01%, sulfur element content 0.01%, and the balance is cobalt. Add the weighed raw materials into the mixer and mix for 2 hours to obtain the drug core powder ;

[0039] 3) Obtain the H08A steel strip for ultrasonic cleaning and drying, process the cross section of the H08A steel strip into a U...

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Abstract

The invention discloses a self-protection flux-cored wire for strengthening the surface of a large hot-forging die and a production method of the self-protection flux-cored wire. The flux-cored wire comprises, by mass percentage, 26-30% of chromium, 8-10% of molybdenum, 1.8-3% of tungsten, 1.5-2.5% of nickel, 0.8-1.2% of silicon, 0.6-1.0% of manganese, 0.15-0.3% of niobium, 1.2-1.6% of carbon, not larger than 0.02% of phosphorus, not larger than 0.02% of sulfur and the balance cobalt and impurities. By the adoption of the self-protection flux-cored wire for strengthening the surface of the large hot-forging die, overlaying of the flux-cored wire is conducted on the surface of the working region of a die cavity of the large hot-forging die, the surface strengthened layer is formed, the temperature of the surface layer of the die cavity of the large hot-forging die is below 500-700 DEG C, the wear, deformation and crack are not likely to generate under the extreme working condition that the load is above 40,000 tons, the service life of the large hot-forging die is prolonged by over 10 times, and the manufacturing cost of large forgings is lowered remarkably.

Description

technical field [0001] The invention belongs to the technical field of welding material manufacturing, and in particular relates to a self-protecting drug-core wire used for surface strengthening of a large hot forging die and a preparation method thereof. Background technique [0002] The 80,000-ton die forging hydraulic press (the world's largest die forging hydraulic press), a major landmark achievement in my country's machinery industry, has played an irreplaceable role in the manufacture of large key parts in aerospace, energy, ships and other fields since it was put into production in 2013 . Nowadays, hydraulic die forging presses are used to form difficult-to-deform materials (such as titanium alloys, high-temperature alloys, ultra-high-strength steel, etc.) The surface layer of the working area of ​​the mold cavity is under extreme working conditions such as high temperature (500-700°C) and heavy load (above 40,000 tons), which makes the working area of ​​the large h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3046B23K35/40
Inventor 周杰张建生熊逸博高飞卢顺沈力
Owner CHONGQING JIEPIN TECH
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