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Volatility-resistant chloride covering agent with high heat capacity and used for heat treatment lead bath

A chloride, high heat capacity technology, applied in the field of alloys, can solve the problems of inability to effectively prevent the volatilization of lead vapor and unstable performance, and achieve the effects of improving the surface quality of the steel wire, excellent volatilization resistance, and low price

Inactive Publication Date: 2018-07-17
GUANGZHOU YUZHI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest feature of the common low melting point molten salt is that its performance is unstable, and it is easy to react with the lead melt itself to form oxide film and nitride film.
This compound film on the surface of the melt cannot effectively prevent the volatilization of lead vapor into the atmosphere

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A volatile chloride resistant cover for heat treating lead baths with high heat capacity at 490°C. By weight percentage, the chemical composition of the material is: LiCl: 10.5wt.%, SrCl 2 :6.2wt.%,CaCl 2 : 2.8wt.%, KCl: 12.4wt.%, B 2 o 3 : 2.6wt.%, FeO: 2.1wt.%, the balance is CaO. Preparation method: raw materials LiCl, SrCl 2 , CaCl 2 , KCl, B 2 o 3 , The particle radius of FeO and CaO is kept below 0.5mm. Put the raw materials weighed according to the above ratio in the mixer for uniform mixing. Due to SrCl 2 , CaCl 2 and CaO easily absorb moisture and CO in the air 2 , The mixing process must be carried out in a dry atmosphere, and the mixing time cannot be longer than 20 minutes. The salt-containing protective agent mixed evenly must be packaged in plastic bags.

[0020] The material has a good effect in the range of 480-580 degrees. Its characteristic is that it can melt by itself in this temperature range, forming a solid-liquid two-phase state to ...

Embodiment 2

[0023] A volatile chloride resistant cover for heat treating lead baths with high heat capacity at 520°C. By weight percentage. By weight percentage, the chemical composition of the material is: LiCl: 10.0wt.%, SrCl 2 :6.5wt.%,CaCl 2 : 2.3wt.%, KCl: 10.8wt.%, B 2 o 3 : 2.6wt.%, FeO: 2.1wt.%, the balance is CaO. Preparation method: raw materials LiCl, SrCl 2 , CaCl 2 , KCl, B 2 o 3 , The particle radius of FeO and CaO is kept below 0.5mm. Put the raw materials weighed according to the above ratio in the mixer for uniform mixing. Due to SrCl 2 , CaCl 2 and CaO easily absorb moisture and CO in the air 2 , The mixing process must be carried out in a dry atmosphere, and the mixing time cannot be longer than 20 minutes. The salt-containing protective agent mixed evenly must be packaged in plastic bags.

[0024] The material has a good effect in the range of 480-580 degrees. Its characteristic is that it can melt by itself in this temperature range, forming a solid-liq...

Embodiment 3

[0027] A volatile chloride resistant cover for heat treating lead baths with high heat capacity at 540°C. By weight percentage. By weight percentage, the chemical composition of the material is: LiCl: 10.5wt.%, SrCl 2 :6.8wt.%,CaCl 2 : 2.1wt.%, KCl: 13.8wt.%, B 2 o 3 : 2.6wt.%, FeO: 2.1wt.%, the balance is CaO. Preparation method: raw materials LiCl, SrCl 2 , CaCl 2 , KCl, B 2 o 3 , The particle radius of FeO and CaO is kept below 0.5mm. Put the raw materials weighed according to the above ratio in the mixer for uniform mixing. Due to SrCl 2 , CaCl 2 and CaO easily absorb moisture and CO in the air 2 , The mixing process must be carried out in a dry atmosphere, and the mixing time cannot be longer than 20 minutes. The salt-containing protective agent mixed evenly must be packaged in plastic bags.

[0028] The material has a good effect in the range of 480-580 degrees. Its characteristic is that it can melt by itself in this temperature range, forming a solid-liq...

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Abstract

The invention discloses a volatility-resistant chloride covering agent with high heat capacity and used for heat treatment lead bath, and a processing technique thereof. The alloy comprises the following components in percentage by weight: 10.0wt.%-12.0wt.% of LiCl, 6.0wt.%-8.0wt.% of SrCl2, 2.0wt.%-5.0wt.% of CaCl, 10.0wt.%-15.0wt.% of KCl, 2.0wt.%-5.0wt.% of B2O3, 2.0wt.%-3.0wt.% of FeO and thebalance CaO. Through development for the covering agent, the problems in the application of a lead bath heat treatment technique are solved, a crucial role is played on the popularization of lead bathheat treatment, and great economic significance is achieved for industrial production.

Description

technical field [0001] The invention relates to the technical field of alloys, in particular to a lead alloy covering agent. Background technique [0002] The output and structural varieties of steel cords in my country are increasing year by year. Steel cord manufacturers have also been committed to the optimization of production processes. Through equipment improvement and process adjustment, the broken wire rate of each production process is continuously reduced, and production efficiency and comprehensive yield are improved. . The change of quenching method in production practice has brought a great improvement to the stability and efficiency of steel cord production. Quenching is a key process in the production of medium and high carbon steel wire, especially the final heat treatment quenching process. The steel wire is quenched to obtain a sorbite structure. Such a structure has a high tensile limit, and the steel wire can obtain good comprehensive properties after dra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/607
CPCC21D1/607
Inventor 杨长江
Owner GUANGZHOU YUZHI TECH CO LTD
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