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A kind of wear-resisting and heat-resisting surfacing welding cermet electrode

A technology of cermets and welding rods, applied in metal processing equipment, welding equipment, welding media, etc., can solve problems such as gaps, and achieve the effects of improved service life, strong and sufficient metallurgical reactions, and high activity

Active Publication Date: 2019-11-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Surfacing welding electrodes with excellent high-temperature oxidation resistance, good wear resistance, high cleanliness, and good fatigue resistance are urgently needed welding materials for mold manufacturing and repair and remanufacturing. At present, the performance of such electrodes in my country is comparable to that in foreign countries large gap

Method used

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  • A kind of wear-resisting and heat-resisting surfacing welding cermet electrode
  • A kind of wear-resisting and heat-resisting surfacing welding cermet electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Ferroalloy passivation Put 45# ferrosilicon, electrolytic metal manganese, and metal chromium in heat-resistant steel trays respectively, with a stacking thickness of 30 mm, and stir 3 times during roasting. The process parameters of roasting are: 45# ferrosilicon at 700°C, hold for 1 hour, and cool with the furnace; electrolytic manganese is at 280°C, hold for 1 hour, and cool with the furnace; metal chromium is 550°C, hold for 1 hour, and cool with the furnace . Other ferroalloys do not need to be treated and can be used as supplied.

[0041] (2) Dry mixed powder is weighed according to the ratio of the coating formula of the electrode. First, marble, fluorite, titanium dioxide, quartz, mica, soda ash and graphite with a small specific gravity are weighed according to the formula ratio and mixed. The powder mixer dry-mixed for 10 minutes to obtain non-alloy mixed powder; then passivated electrolytic manganese metal, 45# ferrosilicon, chromium metal and ferrotitan...

Embodiment 2

[0049] (1) Ferroalloy passivation Put 45# ferrosilicon, electrolytic metal manganese, and metal chromium in heat-resistant steel trays respectively, with a stacking thickness of 40 mm, and stir 5 times during roasting. The process parameters of roasting are: 45# ferrosilicon at 800°C, hold for 1 hour, and cool with the furnace; electrolytic manganese is at 320°C, hold for 1 hour, and cool with the furnace; metal chromium is 580°C, hold for 1 hour, and cool with the furnace . Other ferroalloys do not need to be treated and can be used as supplied.

[0050] (2) Dry mixed powder is weighed according to the ratio of the coating formula of the electrode. First, marble, fluorite, titanium dioxide, quartz, mica, soda ash and graphite with a small specific gravity are weighed according to the formula ratio and mixed. The powder mixer dry-mixed for 15 minutes to obtain non-alloy mixed powder; then passivated electrolytic manganese metal, 45# ferrosilicon, chromium metal and ferrotitan...

Embodiment 3

[0058] (1) Ferroalloy passivation Put 45# ferrosilicon, electrolytic manganese metal, and metal chromium in heat-resistant steel trays respectively, with a stacking thickness of 35 mm, and stir 4 times during roasting. The process parameters of roasting are: 45# ferrosilicon at 750°C, keep warm for 1 hour, and cool with the furnace; electrolytic manganese is at 300°C, keep warm for 1 hour, and cool with the furnace; metal chromium is at 560°C, hold for 1 hour, and cool with the furnace . Other ferroalloys do not need to be treated and can be used as supplied.

[0059] (2) Dry mixed powder is weighed according to the ratio of the coating formula of the electrode. First, marble, fluorite, titanium dioxide, quartz, mica, soda ash and graphite with a small specific gravity are weighed according to the formula ratio and mixed. The powder mixer dry-mixed for 12 minutes to obtain non-alloy mixed powder; then passivated electrolytic manganese metal, 45# ferrosilicon, metal chromium a...

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Abstract

The invention provides metal ceramic welding rod for abrasion-resistant and heat-resistant surfacing. By adding nanometer titanium carbide powder to a coating, the toughness and crack resistance of deposited metal of the welding rod are improved, thus, the standard requirements of high toughness and crack resistance of a hot working die can be met. The molten pool time of welding rod electrode arcwelding is short, the metallurgical reaction of micron-sized powder is insufficient, and sufficient ternary boride hard phases are difficult to form. Therefore, by adding nanometer titanium carbide powder, the morphology of the ternary boride Mo2FeB2 is improved, the ternary boride is dispersed, the toughness and crack resistance of deposited metal are improved, and thus the standard requirementsof high toughness and crack resistance can be met.

Description

technical field [0001] The invention belongs to the field of welding materials, and relates to a cermet electrode for wear-resistant and heat-resistant surfacing welding, especially suitable for surfacing welding of hot work molds. Background technique [0002] Mo 2 FeB 2 Ternary boride-based cermet has high melting point, high hardness, excellent high temperature stability and corrosion resistance, and is suitable for surfacing welding of hot work molds. Mo 2 FeB 2 The main raw materials for the preparation of base cermets are low-priced powders such as Mo, Fe, and FeB. The preparation cost is much lower than that of cemented carbide, and there is no need to use strategic materials such as W and Co. Compared with Ti(C,N)-based cermets The cost is also lower. Currently Mo 2 FeB 2 The base cermet is mainly prepared by the reaction boride sintering method. In the 1980s, Japan successfully prepared Mo by reaction boride sintering method. 2 FeB 2 、Mo 2 NiB 2 , WCoB an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/3086B23K35/40
Inventor 孙俊生李正阶王光乐温永策栾守成于普涟王驰
Owner SHANDONG UNIV
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