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Testing method for breaking strength of continuous casting crystallizer casting powder

A technology of continuous casting crystallizer and fracture strength, which is applied in the direction of strength characteristics, preparation of test samples, and application of stable tension/pressure to test material strength. Optimizing performance and improving slab quality

Inactive Publication Date: 2017-03-15
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no effective test method for the fracture strength of mold powder

Method used

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  • Testing method for breaking strength of continuous casting crystallizer casting powder
  • Testing method for breaking strength of continuous casting crystallizer casting powder
  • Testing method for breaking strength of continuous casting crystallizer casting powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The tensile fracture strength of continuous casting mold flux was tested in the following manner.

[0047] 1) First heat the mold slag for the continuous casting mold at 600-700°C for 30 minutes to remove the carbon in it, then cool it down to room temperature naturally to obtain the decarbonized mold slag; crush the decarbonized mold slag and pass through a 40-mesh sieve, Take the undersize and dry it in a vacuum oven at 60°C to constant weight to obtain the decarbonized mold slag powder.

[0048] 2) Put the carbon-removing mold slag powder into the cavity of the graphite tank (the cavity size is 80mm×10mm×30mm), then place it at 1200°C for 20 minutes, and take it out after air cooling to room temperature to obtain a cuboid mold slag block.

[0049] 3) The two ends of the mold slag block are respectively bonded to the plane of one carabiner with AB glue, and the lock ring is connected with the lock ring of the other carabiner. Then fix the two outer carabiners on the...

Embodiment 2

[0052] The compressive fracture strength of the continuous casting mold powder was tested in the following way.

[0053] 1) First heat the mold slag for the continuous casting mold at 600-700°C for 30 minutes to remove the carbon in it, then cool it down to room temperature naturally to obtain the decarbonized mold slag; crush the decarbonized mold slag and pass through a 40-mesh sieve, Take the undersize and dry it in a vacuum oven at 60°C to constant weight to obtain the decarbonized mold slag powder.

[0054] 2) Put the carbon-removing mold slag powder into the cavity of the graphite tank (the cavity size is 80mm×10mm×30mm), then place it at 1200°C for 20 minutes, and take it out after air cooling to room temperature to obtain a cuboid mold slag block.

[0055] 3) The two ends of the mold slag block are respectively bonded to the plane of one carabiner with AB glue, and the lock ring is connected with the lock ring of the other carabiner. Then fix the two outer carabiners...

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Abstract

The invention discloses a testing method for the breaking strength of continuous casting crystallizer casting powder. The method includes the steps that 1, firstly, the continuous casting crystallizer casting powder is charked at the temperature of 600-700 DEG C, then the continuous casting crystallizer casting powder is naturally cooled to room temperature, decarbonized casting powder is obtained, the decarbonized casting powder is crushed and passes through a 40-mesh sieve, screen underflow is taken, the screen underflow is dried to constant weight in a vacuum drying box at the temperature of 60 DEG C, and decarbonized casting-powder powder is obtained; 2, the decarbonized casting-powder powder is put in a cavity of a graphite cuvette, heat preservation is carried out for 20 min at the temperature of 1,200 DEG C, the materials are taken out after being air-cooled to room temperature, and cuboid-shaped casting powder blocks are obtained; 3, the two ends of the cuboid-shaped casting powder blocks are fixed to the two clamping ends of a tensile testing machine respectively, and then the tensile breaking strength or compressive breaking strength of the casting powder is measured through the tensile testing machine. The movement and lubrication condition of the casting powder can be studied, the performance of the continuous-casting casting powder can be optimized, and the continuous casting process and the casting blank quality can be improved.

Description

technical field [0001] The invention belongs to the technical field of material performance detection, and in particular relates to a method for testing the fracture strength of mold slag in a continuous casting mold. Background technique [0002] Continuous casting mold powder plays an important role in heat insulation, preventing molten steel oxidation, absorbing inclusions, controlling heat transfer, and lubricating casting slabs in the mold. The realization of these metallurgical functions is determined by the various properties of mold flux, including melting performance, crystallization performance, heat transfer performance, and basicity, viscosity, interface properties, etc. Among them, the lubrication effect of mold flux is mainly affected by melting performance, crystallization performance and viscosity. [0003] Mold slag forms a slag film in the gap between the copper plate of the mold and the solidified slab shell, controls the heat transfer from the slab to th...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N1/44
CPCG01N3/08G01N1/44G01N2203/0003G01N2203/0016G01N2203/0067G01N2203/0085
Inventor 俞晟陈登福谢鑫龙木军段华美吕奎
Owner CHONGQING UNIV