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Novel material for CPC high-speed roller zirconium solid-liquid surface

A new type of material, solid-liquid surface technology, applied in the field of iron and steel smelting, can solve the problems that affect the quality of the roll, it is difficult to meet the thermal shock and corrosion resistance, and achieve the effect of low cost, reduced production cost and simple preparation

Inactive Publication Date: 2015-04-08
ZHEJIANG IRON LION HIGH TEMPERATURE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Restricted by solid-liquid surface materials and related technologies, only Nippon Steel and Hitachi Steel Works in Japan can produce CPC high-speed rolls in the world; however, the previous solid-liquid surface materials such as corundum and aluminum carbon are difficult to meet thermal shock And anti-corrosion requirements, affecting the distribution of hard eutectic carbide grains along the grain boundaries of CPC composite casting rolls and the dispersion of granular MC carbides in the crystals, thus affecting the quality of the rolls

Method used

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  • Novel material for CPC high-speed roller zirconium solid-liquid surface

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Embodiment 1

[0029] A method for preparing a novel material of a zirconium solid-liquid surface for a CPC high-speed roll, comprising the following steps:

[0030] (1) Ingredients: choose 1um zirconia (ZrO 2 content>99%) powder as the main ingredient, the additives are magnesium oxide and yttrium oxide, the particle size is 1um, and the contents are respectively: 2% magnesium oxide, 1% yttrium oxide, and the rest are zirconia; the contents are all mass percentages.

[0031] (2) Molding: using 10% by mass polyvinyl alcohol aqueous solution as a binder, adjusted to a slurry with a solid content of 50%, and forming powder particles with a particle size of 100 mesh by centrifugal granulation. The molding method is pressed by a 500Mpa isostatic press;

[0032] (3) Firing: Put the pressed product in a high-temperature tunnel kiln at a firing temperature of 1650°C for 24 hours;

[0033] (4) Adjust product size: Use CNC lathe to carry out precise processing according to the drawings to form prod...

Embodiment 2

[0035] A method for preparing a novel material of a zirconium solid-liquid surface for a CPC high-speed roll, comprising the following steps:

[0036] (1) Ingredients: choose 1um zirconia (ZrO 2 content>99%) powder; the additives are magnesium oxide and yttrium oxide, the particle size is 1um, and the contents are respectively: 4% of magnesium oxide, 2% of yttrium oxide, and the rest are zirconia; the contents are all mass percentages.

[0037] (2) Molding: using 10% by mass polyvinyl alcohol aqueous solution as a binder, adjusted to a slurry with a solid content of 50%, and forming powder particles with a particle size of 200 mesh by centrifugal granulation. The molding method is pressed by a 500Mpa isostatic press;

[0038] (3) Firing: Put the pressed product in a high-temperature tunnel kiln at a firing temperature of 1700°C for 24 hours.

[0039] (4) Adjust product size: Use CNC lathe to carry out precise processing according to the drawings to form products that meet th...

Embodiment 3

[0041] A method for preparing a novel material of a zirconium solid-liquid surface for a CPC high-speed roll, comprising the following steps:

[0042] (1) Ingredients: choose 1um zirconia (ZrO 2 content>99%) powder; the additives are magnesium oxide and yttrium oxide, the particle size is 1um, and the contents are respectively: 3% of magnesium oxide, 1.5% of yttrium oxide, and the rest are zirconia; the contents are all mass percentages.

[0043] (2) Molding: using 10% by mass polyvinyl alcohol aqueous solution as a binder, adjusted to a slurry with a solid content of 50%, and forming powder particles with a particle size of 150 mesh by centrifugal granulation. The molding method is pressed by a 500Mpa isostatic press;

[0044] (3) Firing: Put the pressed product in a high-temperature tunnel kiln at a firing temperature of 1680°C for 24 hours.

[0045] (4) Adjust product size: Use CNC lathe to carry out precise processing according to the drawings to form products that meet th...

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Abstract

The invention discloses a novel material for a CPC high-speed roller zirconium solid-liquid surface. A preparation method of the material comprises the following steps of: selecting zirconium oxide powder with ZrO2 content higher than 99%; selecting magnesium oxide and yttrium oxide as additives; adopting a water solution which contains polyvinyl alcohol as an adhesive, blending to become slurry with solid content of 50%, centrifugally granulating to form a powder granule, and carrying out pressing formation through an isostatic press; placing a pressed product into a high-temperature tunnel kiln, and sintering for 24 hours; finally processing accurately according to a drawing by adopting a digital control lathe to form a product which meets the requirements.

Description

technical field [0001] The invention relates to the field of iron and steel smelting, in particular to a novel solid-liquid surface material for a CPC high-speed roll. Background technique [0002] Since the steel rolling operation is carried out by rolling rolls, the rolls directly affect the product quality and operation days, therefore (industry) there is a strong demand to improve its performance. In order to greatly improve the life of the roll, the Nippon Steel Roller Works and the Iron and Steel Research Institute jointly developed a high-speed (tool) steel roll with the CPC method (Continuous Pouring Process for Cladding, or continuous casting and welding method), and its characteristics are as follows: a. crystalline carbide (C), and the roll has a dense cast structure; b. The Vickers (Vickers) hardness is above 800 obtained by progressive low-frequency induction heating quenching and high-temperature tempering, because the structure is stable when the temperature r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/48C04B35/622
Inventor 都智刚应文瀚周涛佘峰强许琳媛
Owner ZHEJIANG IRON LION HIGH TEMPERATURE MATERIALS CO LTD
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