Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Heat-resistant sphere and production process thereof

A spherical, heat-resistant technology, applied in the field of metal materials, can solve problems such as high tendency of cold cracking, affecting service life and safety

Active Publication Date: 2015-05-20
TOYO GRINDING BALL MAANSHAN
View PDF7 Cites 2 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat-resistant sphere and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A heat-resistant sphere, the composition of the heat-resistant sphere is as follows according to mass percentage: C 3.00%, Si 1.8%, Mn 0.2%, Ni 2.0%, Mo 0.3%, P 0.07%, S 0.02%, the balance It 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 Furnace charge: ductile iron Q10, nickel plate, ferromolybdenum, steel scrap, the furnace charge ensures that the S content of molten iron is low, S is desulfurized by industrial soda ash in the bag, and the sulfur S content in molten iron can be reduced by this method. Reduced to 0.02%, good nodularization.

[0045] Step 2 Feeding: Add the ingredients into the interm...

Embodiment 2

[0054]A heat-resistant sphere, the composition of the heat-resistant sphere is as follows according to mass percentage: C 4.20%, Si 3.0%, Mn 1.2%, Ni 4.0%, Mo 1.0%, P 0.06%, S 0.01%, the balance It 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 ingredients into the ...

Embodiment 3

[0066] A heat-resistant sphere, the composition of the heat-resistant sphere is as follows according to mass percentage: C 3.6%, Si 2.6%, Mn 0.6%, Ni 3.5%, Mo 0.5%, P 0.03%, S 0.01%, the balance It 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 ingredients into the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Yield strengthaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com