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A high chromium cast iron casting

A high-chromium cast iron and casting technology, which is applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve the problems that the preparation method needs to be optimized, so as to reduce the wall thickness, improve the toughness and wear resistance, and increase the service life Effect

Inactive Publication Date: 2016-07-06
NINGGUO DAQUAN MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The formulation of high chromium cast iron castings in the prior art needs to be improved, and the preparation method needs to be optimized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high chromium cast iron casting is composed of the following components and their mass percentages: C: 3.05%, Mn: 0.8%, Si: 0.6%, Cr: 11%, B: 1.2%, Cu: 0.1%, V: 1.2% , Ni: 0.08%, P: 0.01%, S: 0.02%, and the balance is Fe.

[0034] The preparation method of high chromium cast iron casting comprises the following steps:

[0035] (1) Preparation of sand mold;

[0036] (2) Raw material smelting: smelting in a medium frequency induction furnace; and now lay a layer of lime and fluorspar at the bottom of the furnace, lime: fluorspar=4:1 (weight ratio), and the weight of lime is 1% of the weight of the metal material; add Scrap steel and pig iron are melted, first cover the liquid surface with pearl sand, and add ferromanganese when the temperature is 1540 °C; when the temperature is 1570 °C, add ferrosilicon and ferrochromium to adjust the composition, and add ferroboron 7 minutes before tapping for metamorphic treatment and precipitation. Deoxidation treatment;

[0037]...

Embodiment 2

[0043] A high chromium cast iron casting is composed of the following components and their mass percentages: C: 3.1%, Mn: 0.76%, Si: 0.7%, Cr: 10.6%, B: 1.4%, Cu: 0.08%, V: 1.4% , Ni: 0.06%, P: 0.02%, S: 0.01%, and the balance is Fe.

[0044] The preparation method of high chromium cast iron casting comprises the following steps:

[0045] (1) Preparation of sand mold;

[0046] (2) Raw material smelting: smelting in a medium frequency induction furnace; and now lay a layer of lime and fluorspar at the bottom of the furnace, lime: fluorspar=4:1 (weight ratio), and the weight of lime is 1% of the weight of the metal material; add Scrap steel and pig iron are melted, first cover the liquid surface with pearl sand, and add ferromanganese when the temperature is 1545 °C; when the temperature is 1555 °C, add ferrosilicon and ferrochromium to adjust the components, and add ferroboron 9 minutes before tapping for metamorphism and precipitation. Deoxidation treatment;

[0047] (3) po...

Embodiment 3

[0053] A high chromium cast iron casting is composed of the following components and their mass percentages: C: 3.07%, Mn: 0.78%, Si: 0.65%, Cr: 10.8%, B: 1.3%, Cu: 0.09%, V: 1.3% , Ni: 0.07%, P: 0.01%, S: 0.015%, and the balance is Fe.

[0054] The preparation method of high chromium cast iron casting comprises the following steps:

[0055] (1) Preparation of sand mold;

[0056] (2) Raw material smelting: smelting in a medium frequency induction furnace; and now lay a layer of lime and fluorspar at the bottom of the furnace, lime: fluorspar=4:1 (weight ratio), and the weight of lime is 1% of the weight of the metal material; add Scrap steel and pig iron are melted, first cover the liquid surface with pearl sand, and add ferromanganese when the temperature is 1542 °C; when the temperature is 1560 °C, add ferrosilicon and ferrochromium to adjust the ingredients, and add ferroboron 8 minutes before tapping for metamorphic treatment and precipitation. Deoxidation treatment;

...

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Abstract

The invention discloses a high-chromium cast iron casting composed of the following components by the mass percentage: 3.05-3.1% of C, 0.76-0.8% of Mn, 0.6-0.7% of Si, 10.6-11% of Cr, 1.2-1.4% of B, 0.08-0.1% of Cu, 1.2-1.4% of V, 0.06-0.08% of Ni, not more than 0.02% of P, not more than 0.02% of S, and the balance Fe. Through reasonable improvement of the ratio of the components of the high-chromium cast iron casting, and through reasonable smelting, casting, heat treatment and other processing technologies, the strength, toughness and wear resistance of the casting are improved; through control of the casting time and sand mould temperature, generation of shrinkage porosity and shrinkage cavity is prevented, the toughness and wear resistance of the casting are also improved, and the tensile strength is 480-500 MPa equivalent to the performance of HT450 castings; and in the product design process, the wall thickness can be reduced, the casting weight is reduced, the cost is saved, and the service life is increased by 1.5-2 times.

Description

technical field [0001] The invention relates to a high-chromium cast iron casting. Background technique [0002] High-chromium cast iron is the abbreviation of high-chromium white anti-wear cast iron, which is a kind of anti-wear material with excellent performance and special attention. It has much higher wear resistance than alloy steel, and much higher toughness and strength than ordinary white cast iron. At the same time, it also has good high temperature resistance and corrosion resistance, as well as convenient production and moderate cost. Known as one of the best anti-abrasive wear materials in the contemporary era. [0003] High-chromium cast iron is a metal wear-resistant material and an important branch of wear-resistant cast iron and chromium-based wear-resistant cast iron. It is the third generation of white cast iron developed after ordinary white cast iron and nickel hard cast iron. The first patent for high chromium cast iron appeared as early as 1917. Hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C33/08C21D1/18B22C9/02
Inventor 刘大喜
Owner NINGGUO DAQUAN MACHINERY