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A heat-resistant sphere and its production process

A production process and technology for spheres, applied in the field of heat-resistant spheres and their production processes, can solve the problems of affecting service life and safety, large cold cracking tendency, etc.

Active Publication Date: 2016-08-24
TOYO GRINDING BALL MAANSHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of industrial use, since the guard plate of the sintering machine must not only be heat-resistant, but also have a certain high-temperature strength, it is found that these two materials have a high tendency of cold cracking, which will affect the service life and safety.

Method used

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  • A heat-resistant sphere and its production process

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Effect test

Embodiment 1

[0042] A heat-resistant sphere, the components of the heat-resistant sphere are as follows in terms of mass percentage: C 3.00%, Si 1.8%, Mn 0.2%, Ni 2.0%, Mo 0.3%, P 0.07%, S 0.02%, remainder The main content is Fe. By adding Ni and a small amount of Mo alloy in the composition, we increase the toughness and high temperature resistance of the material, ensure the thermal fatigue resistance of the material, prevent the tendency of cracking, improve the safety factor and prolong the service life.

[0043] A process for producing the heat-resistant sphere as claimed in claim 1, comprising the following steps:

[0044] Step 1 charge: nodular pig iron Q10, nickel plate, ferromolybdenum, steel scrap, low S content in the molten iron is ensured in the charge, industrial soda ash is used to remove S in the bag, and the sulfur S content in the molten iron can be reduced by using this method to remove S Reduced to 0.02%, good nodularization.

[0045] Step 2 Feeding: Add the ingredient...

Embodiment 2

[0054]A heat-resistant sphere, the composition of the heat-resistant sphere is as follows in terms of mass percentage: C 4.20%, Si 3.0%, Mn 1.2%, Ni 4.0%, Mo 1.0%, P 0.06%, S 0.01%, remainder The main content is Fe. By adding Ni and a small amount of Mo alloy in the composition, we increase the toughness and high temperature resistance of the material, ensure the thermal fatigue resistance of the material, prevent the tendency of cracking, improve the safety factor and prolong the service life.

[0055] A process for producing the heat-resistant sphere as claimed in claim 1, comprising the following steps:

[0056] Step 1 charge: nodular pig iron Q10, nickel plate, ferromolybdenum, steel scrap, low S content in the molten iron is ensured in the charge, industrial soda ash is used to remove S in the bag, and the sulfur S content in the molten iron can be reduced by using this method to remove S Reduced to 0.01%, good spheroidization;

[0057] Step 2 Feeding: Add the ingredient...

Embodiment 3

[0066] A heat-resistant sphere, the composition of the heat-resistant sphere is as follows in terms of mass percentage: C 3.6%, Si 2.6%, Mn 0.6%, Ni 3.5%, Mo 0.5%, P 0.03%, S 0.01%, remainder The main content is Fe. By adding Ni and a small amount of Mo alloy in the composition, we increase the toughness and high temperature resistance of the material, ensure the thermal fatigue resistance of the material, prevent the tendency of cracking, improve the safety factor and prolong the service life.

[0067] A process for producing the heat-resistant sphere as claimed in claim 1, comprising the following steps:

[0068] Step 1 charge: nodular pig iron Q10, nickel plate, ferromolybdenum, steel scrap, low S content in the molten iron is ensured in the charge, industrial soda ash is used to remove S in the bag, and the sulfur S content in the molten iron can be reduced by using this method to remove S Reduced to 0.01%, good spheroidization;

[0069] Step 2 Feeding: Add the ingredient...

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Abstract

The invention relates to a heat-resistant sphere which is prepared from the following components in percentage by weight: 3.00-4.20% of C, 1.8-3.0% of Si, 0.2-1.2 of Mn, 2.0-4.0% of Ni, 0.3-1.0% of Mo, less than or equal to 0.07% of P, less than or equal to 0.02% of S and the balance of Fe. According to the heat-resistant sphere provided by the invention, the fatigue resistance of the material is guaranteed by adding Ni and Mo elements; and moreover, the cold cracking tendency is reduced, the safety coefficient is improved, and the service life is prolonged. The preparation process is further improved, for example, the content of S is strictly controlled, and S is removed in a ladle by using industrial sodium carbonate; a metal-stream inoculation treatment method is adopted; a unique high-medium annealing treatment process and the like are adopted, and the tensile strength, yield strength, ductility and hardness HS of the prepared heat-resistant sphere are greatly improved.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a heat-resistant sphere and a production process thereof. Background technique [0002] Compared with other heat-resistant alloys, heat-resistant cast iron has the advantages of low cost and easy melting, so it is widely used in industry. Heat-resistant cast iron must have good heat resistance and certain room temperature and high temperature mechanical properties. [0003] Sintering machine accessories generally use medium silicon molybdenum nodular cast iron or high alumina nodular cast iron, and their performance indicators and thermal fatigue resistance are also good under 100-800 °C cycle conditions. [0004] The patent number is CN200410036136.4 three-section furnace smelting high-alumina nodular cast iron production method, which discloses that the composition of high-alumina nodular cast iron contains C, Si, Mn, S, P, and the rest is Fe, although this component produces Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C37/04C22C33/08C21D5/00
CPCC21D5/00C22C33/10C22C37/04C22C37/10
Inventor 春日宏之黄友革
Owner TOYO GRINDING BALL MAANSHAN
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