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A laser cladding alloy powder for hot work mold repair and remanufacturing

A technology of alloy powder and laser cladding, which is applied in the direction of metal material coating process and coating, can solve the problems of high price and high impurity quality of thermal spray powder, improve the performance of laser cladding process, violent metallurgical reaction, improve The effect of high temperature hardness

Active Publication Date: 2018-01-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problem of expensive nickel-based and cobalt-based thermal spray powders, the present invention selects iron-based alloy powders, wherein scrap steel is used to replace pure iron, and while forming iron-based alloys, waste recycling is realized; however, due to the amount of impurities in scrap steel Higher, phosphorus removal, carbon reduction, and sulfur removal are required in the refining process to obtain molten steel with qualified composition and temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Determine the types and quantities of metals, ferroalloys and modifiers according to the chemical composition indicators of the alloy powder to be produced.

[0054] The formula of metal, iron alloy and modifier is as follows in parts by mass: electrolytic manganese 4, 45# ferrosilicon 3, titanium iron 2, metal chromium 30, high carbon ferrochrome 20, vanadium iron 2, molybdenum iron 12, tungsten powder 2, metal Nickel 4, boron iron 4, nano chromium nitride powder 1, yttrium oxide powder 2. Among them, nano-chromium nitride powder and yttrium oxide powder are modifiers. Scrap steel is selected from Q195, and its addition amount is 2.2 times the total amount of the above-mentioned metals, ferroalloys, and modifiers. The particle size of nano-chromium nitride powder is more than 99% less than 100 nanometers. There are no special requirements for the block size and powder particle size of other steel scraps, metals, ferroalloys, and modifiers. The principle is that it...

Embodiment 2

[0059] (1) Determine the types and quantities of metals, ferroalloys and modifiers according to the chemical composition indicators of the alloy powder to be produced.

[0060] The formula of metal, iron alloy and modifier is as follows in parts by mass: 3 electrolytic manganese, 45# ferrosilicon 4, ferrotitanium 4, metallic chromium 30, high carbon ferrochrome 30, graphite 3, ferrovanadium 6, ferromolybdenum 18, tungsten powder 4. Metal nickel 5, boron iron 6, nano chromium nitride powder 2, yttrium oxide powder 5. Among them, nano-chromium nitride powder and yttrium oxide powder are modifiers. The steel scrap is Q195, and its addition amount is 1.2 times of the total amount of the above-mentioned metals, ferroalloys, modifiers, and graphite. The particle size of nano-chromium nitride powder is more than 99% less than 100 nanometers. There are no special requirements for the block size and powder particle size of other steel scraps, metals, ferroalloys, and modifiers. The pr...

Embodiment 3

[0065] (1) Determine the types and quantities of metals, ferroalloys and modifiers according to the chemical composition indicators of the alloy powder to be produced.

[0066] The formula of metal, iron alloy and modifier is as follows in parts by mass: electrolytic manganese 4, 45# ferrosilicon 4, titanium iron 3, metal chromium 30, high carbon ferrochrome 25, graphite 3, vanadium iron 4, molybdenum iron 15, tungsten powder 3. Metal nickel 6, boron iron 5, nano chromium nitride powder 1, yttrium oxide powder 4. Among them, nano-chromium nitride powder and yttrium oxide powder are modifiers. Scrap steel is selected from Q195, and its addition amount is 1.8 times of the total amount of the above-mentioned metals, ferroalloys, modifiers, and graphite. The particle size of nano-chromium nitride powder is more than 99% less than 100 nanometers. There are no special requirements for the block size and powder particle size of other steel scraps, metals, ferroalloys, and modifiers....

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Abstract

The invention provides laser cladding alloy powder for repairing and remanufacturing a hot-working die. In order to solve the problem that nickel-based or cobalt-based thermal spraying powder is expensive, iron-based alloy powder is adopted in the invention. While the iron-based alloy is formed through replacing pure iron with waste steel, the reutilization of the waste is realized. However, as the impurity content in the waste steel is high, the removal of phosphorous, carbon and sulphur is required in the refining process so as to obtain molten steel of which the components and temperature are qualified. The traditional method usually removes the impurities through slagging in the form of furnace slag, but has the problems of high heat energy requirement, large metal losses and serious splashing. In order to solve the problems, a traditional slag former is replaced by yttrium oxide, and waste steel impurities and glomeration inclusions are removed through the purifying functions of rare-earth elements. Meanwhile, deposited metal is endowed with excellent anti-fatigue performance.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to a laser cladding alloy powder used for repairing and remanufacturing of thermal molds. Background technique [0002] In recent years, with the rapid development of my country's manufacturing industry, the amount of dies, especially hot work dies, such as hot rolling work rolls, hot forging dies, hot extrusion dies, hot blanking dies, etc. It is one of the consumable parts widely used in production. During use, the mold will fail due to peeling, scratches, wear, etc. due to wear and thermal fatigue. How to improve its service life has always been a research hotspot at home and abroad. In view of the fact that the failure of the mold mostly starts from the surface, starting from saving energy and resources, fully utilizing the material performance potential and obtaining special performance and maximum technical and economic benefits, improving and improving the performance of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10B22F1/00
CPCB22F1/0003C23C24/103
Inventor 孙俊生耿韶宁李正阶孙洪根
Owner SHANDONG UNIV
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