Durable silicon steel furnace bottom roller sleeve and preparation method thereof

A hearth roller and durable technology, applied in the field of durable silicon steel hearth roller sleeve and its preparation, can solve the problems of loose surface of carbonaceous hearth roller sleeve, affecting the quality of silicon steel plate, shortening the service life, etc. The effect of improving oxidation resistance, enhancing wear resistance and prolonging service life

Inactive Publication Date: 2010-07-07
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after years of production and application, it has been shown that there are also some outstanding problems, mainly as follows: surface nodules occur during use, scratch the surface of the silicon steel plate, affect the electrical properties of the silicon steel plate and cause waste products; poor wear resistance Well, after a period of use, the middle of the casing is worn and thinned to form a "dumbbell shape", causing deformation and defective pr

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0012] Example 1

[0013] A durable silicon steel furnace bottom roller sleeve and a preparation method thereof. Mix 2-6wt% of large dense carbonaceous raw material particles, 6-10wt% of small dense carbonaceous raw material particles, 85-90wt% of fine powder of dense carbonaceous raw material and 1.2-1.6wt% of Si powder, plus the above-mentioned compounding A mixture of 8-12wt% asphalt powder and phenolic resin is mixed and milled for 20-30 minutes.

[0014] The preparation process of this embodiment is: first press the mixed material after mixing into a silicon steel hearth roller casing tube blank, and the pressed silicon steel hearth roller casing tube blank is kept at 1400~1420℃ for 6~8 hours Roasting; place it in a sealed pressure vessel and keep it for 20-30 minutes under the condition of a vacuum of 10000~1500Pa, then open the valve to inject tar until the tube blank is completely immersed, and then pump to a vacuum of 10000~15000Pa, keep it 20 to 30 minutes; finally, hea...

Example Embodiment

[0015] Example 2

[0016] A durable silicon steel furnace bottom roller sleeve and a preparation method thereof. Mix 6-10wt% of large dense carbonaceous raw material particles, 6-10wt% of small dense carbonaceous raw material particles, 80-85% by weight of dense carbonaceous raw material fine powder and 1.6-2.0wt% of Si powder, plus the above-mentioned compounding A mixture of 12-15wt% asphalt powder and phenolic resin is mixed and milled for 20-30 minutes.

[0017] The preparation process of this embodiment is: first press the mixed material after mixing into a silicon steel furnace bottom roller casing tube blank, and the pressed silicon steel furnace bottom roller casing tube blank is kept at 1410-1430°C for 6-8 hours Roasting; then placed in a sealed pressure vessel and kept at a vacuum of 11000~15000Pa for 20~30 minutes, then open the valve to inject tar until the tube blank is completely soaked, and then pump air to a vacuum of 11000~15000Pa, keep it 20-30 minutes; finally,...

Example Embodiment

[0018] Example 3

[0019] A durable silicon steel furnace bottom roller sleeve and a preparation method thereof. Mix 2-6wt% of large particles of dense carbonaceous raw material, 2-6wt% of small particles of dense carbonaceous raw material, 90-95% by weight of dense carbonaceous raw material fine powder and 0.3-0.8wt% of Si powder, and add the above compound A mixture of 15-20wt% asphalt powder and phenolic resin is mixed and milled for 20-30 minutes.

[0020] The preparation process of this embodiment is as follows: first press the mixed material after mixing into a silicon steel furnace bottom roller casing tube blank, and the pressed silicon steel furnace bottom roller casing tube blank is kept at 1420-1440°C for 5-7 hours Roasting; place it in a sealed pressure vessel and keep it at a vacuum of 12000~18000Pa for 18-28 minutes, then open the valve and inject tar until the tube billet is fully immersed, and then pump to a vacuum of 12000~18000Pa, keep it 18-28 minutes; finally ...

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Abstract

The invention relates to a silicon steel furnace bottom roller sleeve and a preparation method thereof. The technical scheme of the invention is as follows: 2-10wt% of dense carbon material large particles, 2-10wt% of dense carbon material small particles, 80-95wt% of dense carbon material fine powder and 0.3-2.0wt% of Si micro powder are mixed together and are then ground for 20 to 30 minutes with the addition of 8-20wt% of bonding agent of the above materials; a silicon steel furnace bottom roller sleeve blank is manufactured after the mixed grinding and is baked for 4 to 8 hours after heat preservation under the temperature of 1,400 to 1,450 DEG C; then the silicon steel furnace bottom roller sleeve blank is placed in a pressure vessel and is maintained for 15 to 30 minutes under the pressure of 10,000 to 20,000Pa, tar is filled until the sleeve blank is completely soaked, and then the sleeve blank is pumped to the vacuum degree of 10,000 to 20,000Pa and is maintained for 15 to 30 minutes; finally, the sleeve blank is heat-preserved for 8 to 12 hours under the high temperature of 1,950 to 2,150 DEG C and is processed by machinery until the surface roughness is smaller than or equal to 12.5. The durable silicon steel furnace bottom roller sleeve has the characteristics of long service life, good oxidation resisting performance, high strength, good wear-resisting property, low porosity, no accretion and high quality of silicon steel plates.

Description

technical field [0001] The invention belongs to the technical field of preparing high-temperature-resistant metallurgical materials from carbonaceous raw materials. In particular, it relates to a durable silicon steel hearth roller casing and a preparation method thereof. Background technique [0002] Since the 1980s, the steel industry has developed a continuous annealing system to produce high-quality steel plates, which has created a demand for high-quality hearth rolls, and this demand has grown with the development of the steel industry. Due to the special properties of silicon steel sheets, the continuous annealing furnace for producing silicon steel plates has more unique requirements for the hearth roll sleeves. At present, the sleeves used for silicon steel hearth rolls are carbonaceous material sleeves. [0003] Patents JP57137419A, JP57140377A, 1092324A, CN1117479, CN1994967, and CN2199206 respectively describe silicon steel hearth roller sleeves and their prepar...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 祝洪喜邓承继白晨刘奎然钟庆
Owner WUHAN UNIV OF SCI & TECH
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