Covering agent for chromium zirconium copper smelting as well as preparation method and use method thereof

A covering agent, chrome-zirconium-copper technology, applied in the field of covering agent for high-strength and high-conductivity alloy smelting, chrome-zirconium-copper smelting, can solve the problems of low welding cost, uneven composition, scrapping, etc., and achieve the solution of porosity, Effective, easy-to-use effect

Active Publication Date: 2018-12-11
JINTIAN COPPER GROUP CORP NINGBO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Chromium-zirconium copper is a kind of high-strength and high-conductivity alloy, which has good electrical conductivity, thermal conductivity, high hardness, wear resistance, anti-violence, crack resistance and high softening temperature, less electrode loss during welding, fast welding speed and low total welding cost It is widely used in welding, contact tips, switch contacts, mold blocks, and welding auxiliary devices in automobiles, motorcycles and other mechanical industries. However, in the non-vacuum casting process, the burning loss of zirconium is particularly serious. , leading to frequent occurrence of smelted billets with uneven composition, and even in the later stage of casting, there is no zirconium. At the same time, there is also a problem of air absorption during the melting and casting process. Serious central pores appear in the billet, which leads to the direct scrapping of the billet. It is urgent to develop a A covering agent used in the melting and casting process to reduce the burning loss of zirconium, and at the same time prevent the melt from absorbing gas and the problem of central pores

Method used

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  • Covering agent for chromium zirconium copper smelting as well as preparation method and use method thereof
  • Covering agent for chromium zirconium copper smelting as well as preparation method and use method thereof
  • Covering agent for chromium zirconium copper smelting as well as preparation method and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Select 65% silicate, 15% carbonate, 5% fluoride, 6% chloride, 5% boron, and 4% oxide, and configure the melt covering agent according to the above ratio. Packaged in bags.

[0033] In a non-vacuum state, chrome-zirconium copper is smelted in a 50kg medium-frequency induction furnace. After the copper is melted, a covering agent is added, and the temperature is raised to about 1300°C. The thickness of the surface is about 2mm. At the same time, add metal chromium and keep it warm for more than 10 minutes, then lower the voltage, control the temperature at 1180 ° C ~ 1240 ° C, add copper-zirconium master alloy, keep warm, record the change of zirconium burning loss, and the trend of chromium zirconium burning loss Such as figure 1 shown.

Embodiment 2

[0035] Select 70% of silicate, 10% of carbonate, 5% of fluoride, 6% of chloride, 5% of boron and 4% of oxide, and configure the melt covering agent according to the above ratio. Packaged in bags.

[0036] In a non-vacuum state, chrome-zirconium copper is smelted in a 50kg medium-frequency induction furnace. After the copper is melted, a covering agent is added, and the temperature is raised to about 1300°C. The thickness of the surface is about 2mm. At the same time, add metal chromium and keep it warm for more than 10 minutes, then lower the voltage, control the temperature at 1180 ° C ~ 1240 ° C, add copper-zirconium master alloy, keep warm, record the change of zirconium burning loss, and the trend of chromium zirconium burning loss Such as figure 2 shown.

Embodiment 3

[0038] Select 75% of silicate, 5% of carbonate, 5% of fluoride, 6% of chloride, 5% of boron and 4% of oxide, and configure the melt covering agent according to the above ratio. Packaged in bags.

[0039] In a non-vacuum state, chrome-zirconium copper is smelted in a 50kg medium-frequency induction furnace. After the copper is melted, a covering agent is added, and the temperature is raised to about 1300°C. The thickness of the surface is about 2mm. At the same time, add metal chromium and keep it warm for more than 10 minutes, then lower the voltage, control the temperature at 1180 ° C ~ 1240 ° C, add copper-zirconium master alloy, keep warm, record the change of zirconium burning loss, and the trend of chromium zirconium burning loss Such as image 3 shown.

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Abstract

The invention discloses a covering agent for chromium zirconium copper smelting as well as a preparation method and a use method thereof. The covering agent is mainly prepared from the following components in percentage by mass: 40 to 80 percent of silicate, 10 to 30 percent of carbonate, 5 to 20 percent of fluoride, 5 to 8 percent of chlorine salt, 5 to 10 percent of boron salt and 0 to 5 percentof oxide. The preparation process of the covering agent for chromium zirconium copper smelting is simple, environmentally-friendly and pollution-free; when the covering agent is applied to chromium zirconium copper smelting, the burning loss of zirconium in a cast ingot can be reduced from 80 to 100 percent in the past to 30 to 40 percent after 30-minutes heat preservation; and the covering agentis convenient to use, has very significant effect and solves the problem that air holes occur in a casting blank caused by the fact that the melt sucks air.

Description

technical field [0001] The invention belongs to the field of chemical metallurgy and relates to a covering agent for smelting high-strength and high-conductivity alloys, in particular to a covering agent for smelting chromium-zirconium-copper and its preparation and use methods. Background technique [0002] Chromium-zirconium copper is a kind of high-strength and high-conductivity alloy, which has good electrical conductivity, thermal conductivity, high hardness, wear resistance, anti-violence, crack resistance and high softening temperature, less electrode loss during welding, fast welding speed and low total welding cost It is widely used in welding, contact tips, switch contacts, mold blocks, and welding auxiliary devices in automobiles, motorcycles and other mechanical industries. However, in the non-vacuum casting process, the burning loss of zirconium is particularly serious. , leading to frequent occurrence of smelted billets with uneven composition, and even in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/03C22C9/00
CPCC22C1/03C22C1/06C22C9/00
Inventor 欧阳好李正裘桂群巢国辉
Owner JINTIAN COPPER GROUP CORP NINGBO
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