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

Iron-based composite material reinforced by in-situ titanium carbide grains and preparing method thereof

An iron-based composite material and particle-reinforced technology, which is applied in the field of in-situ titanium carbide particle-reinforced iron-based composite material and its preparation, can solve the problems of reducing strength and plasticity, achieve improved uniformity, easy process realization, and avoid formation Effect

Active Publication Date: 2012-07-18
JIANGSU TANGCHEN AUTOMOBILE PARTS
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the TiC particle distribution is not highly dispersed or even agglomerated, it will lead to severe microscopic strains in localized areas in the microstructure, thereby reducing the strength and plasticity during stretching.

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
  • Iron-based composite material reinforced by in-situ titanium carbide grains and preparing method thereof
  • Iron-based composite material reinforced by in-situ titanium carbide grains and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] To prepare iron matrix composites reinforced with titanium carbide particles with a volume fraction of 0.5%. Using the mechanical alloying method, put the iron powder, titanium powder and carbon powder with a ratio of 7:2:1 into the mushroom machine, grind them in a neutral or reducing atmosphere for 6 hours, and mix them thoroughly to form a composite powder , melting and processing nodular cast iron by conventional methods, during the secondary inoculation process of nodular cast iron, iron-titanium-carbon composite powder with a mass fraction of 1.5% of nodular cast iron was added along with the inoculant, kept for 5 minutes, and then poured to obtain the as-cast composite material, and then cast The as-state composite material was austenitized and heat treated by austempering at 380 °C for 120 min.

[0020] figure 1 Scanning electron micrographs of iron-based composites reinforced with in-situ titanium carbide particles. It can be seen from the figure that the obt...

Embodiment 2

[0022] To prepare iron matrix composites reinforced with titanium carbide particles with a volume fraction of 3%. Using the mechanical alloying method, put the iron powder, titanium powder and carbon powder in the ratio of 5:4:1 into the ball mushroom machine, grind in a neutral or reducing atmosphere for 10 hours, and mix well to form a composite powder , melting and processing nodular cast iron by conventional methods, during the secondary inoculation process of nodular cast iron, iron-titanium-carbon composite powder with a mass fraction of 6.0% of nodular cast iron was added along with the inoculant, kept for 10 minutes, and then poured to obtain the as-cast composite material, and then cast The as-state composite material was subjected to the same processing steps as in Example 1 for austempering heat treatment. The average size of the reinforced particles in the prepared TiC particle-reinforced iron-based composite material is about 80nm, and the distribution on the matr...

Embodiment 3

[0024] To prepare iron matrix composites reinforced with titanium carbide particles with a volume fraction of 1.5%. Using the mechanical alloying method, put the iron powder, titanium powder and carbon powder in the ratio of 6:3:1 into the mushroom machine, grind it in a neutral or reducing atmosphere for 8 hours, and mix it well to form a composite powder , using conventional methods to melt and process nodular cast iron, adding iron-titanium-carbon composite powder with a mass fraction of 3.5% of nodular cast iron along with the inoculant during the secondary inoculation process of nodular cast iron, keeping it warm for 8 minutes, then pouring to obtain the as-cast composite material, and then casting The composite material was austenitized and austempered at 400°C for 60 minutes. The average size of the reinforcing particles in the prepared TiC particle reinforced iron-based composite material is about 100nm, and they are evenly distributed on the matrix. The mechanical pro...

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
Average sizeaaaaaaaaaa
Tensile strengthaaaaaaaaaa
Impact toughnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses an iron-based composite material reinforced by in-situ titanium carbide grains and a preparing method thereof. The preparing method is characterized in that: high-strength high-toughness spheroidal graphite cast iron is used as a matrix, in-situ grown submicron titanium carbide grains are used as reinforcing grains, and the titanium carbide grains are uniformly distributedon the spheroidal graphite cast iron matrix to obtain a high-strength high-toughness iron-based composite material; and iron powder, titanium powder and carbon powder are fully mixed by utilizing a mechanical alloying method to form composite powder, spheroidal graphite cast iron is molten and treated by a conventional method, the composite powder is added to molten iron during secondary inoculation in proportion, constant temperature is kept for 5-10min and casting is carried out to obtain a cast-state composite material, and the cast-state composite material is subjected to isothermal quenching heat treatment to obtain the iron-based composite material. According to the iron-based composite material prepared by the method disclosed by the invention, the in-situ titanium carbide grains are small in size and uniformly distributed on the matrix so as to ensure the characteristics of high strength and high toughness of the iron-based composite material.

Description

technical field [0001] The invention relates to an iron-based composite material and a preparation method thereof, in particular to an in-situ titanium carbide particle reinforced iron-based composite material and a preparation method thereof. Background technique [0002] By adding high-strength and high-hardness ceramic reinforcement particles to iron-based materials, iron-based composite materials can be obtained, which effectively improves the strength of iron-based materials, and has been widely used in service conditions such as heat resistance and wear resistance. According to the source of particle reinforcement, iron-based composites can be divided into external particle-reinforced iron-based composites and in-situ particle-reinforced iron-based composites. Since the reinforced particles generated in situ are often thermodynamically stable phases directly generated from the metal matrix through chemical reactions, the interface between the reinforced particles and t...

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): C22C37/04C22C33/08B22D19/14C21D1/20C21D5/00
Inventor 陈刚毛永锋赵玉涛朱劲松张松利
Owner JIANGSU TANGCHEN AUTOMOBILE PARTS
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