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

High wear resistance high chromium cast iron used for bimetallic composite tube and preparation method thereof

A technology of bimetal composite pipe and high chromium cast iron, which is applied in the field of wear-resistant metal materials, can solve problems such as poor wear resistance, and achieve the effects of improved wear resistance, high hardness and simple process

Inactive Publication Date: 2015-02-04
TANGSHAN COLLEGE
View PDF10 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Generally speaking, the higher the surface hardness of the material, the stronger the ability to resist the abrasive particles being pressed into the surface layer, the smaller the volume of the material removed by the abrasive, and the better the wear resistance of the material. However, studies have also shown that: the wear resistance of the metal with the lowest hardness Relatively poor wear resistance, but under a considerable number of conditions, the wear resistance is not the best at the highest hardness

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
  • High wear resistance high chromium cast iron used for bimetallic composite tube and preparation method thereof
  • High wear resistance high chromium cast iron used for bimetallic composite tube and preparation method thereof
  • High wear resistance high chromium cast iron used for bimetallic composite tube and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: The high-wear-resistant high-chromium cast iron used in the bimetal composite pipe adopts the following composition ratio and preparation method.

[0032] The chemical composition is calculated by mass percentage: C 2.56%, Mn 1.0%, Si 2.5%, P 0.08%, S 0.04%, Cr 9.47%, V 0.10%, Ti 0.16%, and the balance is Fe and unavoidable impurities.

[0033]Preparation method: smelting in a 500kg intermediate frequency induction furnace and performing V and Ti alloying treatment. Before alloying treatment, add aluminum accounting for 0.30% of the qualified molten iron quality for deoxidation, and the furnace temperature is 1520°C; the furnace lining is acidic or basic. The proportioning, knotting, drying and sintering of the furnace lining are all carried out according to the conventional process. After being out of the furnace, the bimetallic composite pipe is made by centrifugal casting, and then heat treated. The specific process is: 980°C, heat preservation for 2 ho...

Embodiment 2

[0035] Embodiment 2: The high wear-resistant high-chromium cast iron adopts the following composition ratio and preparation method.

[0036] The chemical composition is calculated by mass percentage: C 3.25%, Mn 0.59%, Si 3.0%, P 0.065%, S 0.03%, Cr 11.37%, V 0.89%, Ti 0.20%, and the balance is Fe and unavoidable impurities.

[0037] Preparation method: adding 0.20% aluminum of qualified molten iron quality for deoxidation, the furnace temperature is 1500°C; the heat treatment process is: 960°C, heat preservation for 2.5h, air cooling; tempering temperature 400°C, heat preservation for 4h, air cooling; the rest is the same as in Example 1 .

[0038] The high chromium cast iron obtained in this example was tested according to relevant national standards, and the test results are shown in Table 1.

Embodiment 3

[0039] Embodiment 3: The high wear-resistant high-chromium cast iron adopts the following composition ratio and preparation method.

[0040] The chemical composition is calculated by mass percentage: C 2.70%, Mn 0.82%, Si 2.69%, P 0.059%, S 0.017%, Cr 12.13%, V 0.21%, Ti 0.15%, and the balance is Fe and unavoidable impurities.

[0041] Preparation method: adding 0.40% aluminum of qualified molten iron quality for deoxidation, the furnace temperature is 1540°C; the heat treatment process is: 970°C, heat preservation 3h, air cooling; tempering temperature 420°C, heat preservation 3.5h, air cooling; the rest is the same as in Example 1 .

[0042] The high chromium cast iron obtained in this example was tested according to relevant national standards, and the test results are shown in Table 1.

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
Rockwell hardnessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high wear resistance high chromium cast iron used for a bimetallic composite tube and a preparation method thereof. The high wear resistance high chromium cast iron comprises the following chemical components by weight percentage: 2.0-3.5% of C, 1.0-3.0% of Si, 0.5-1.5% of Mn, less than or equal to 0.10% of P, less than or equal to 0.05% of S, 9.0-14.0% of Cr, 0.10% of 1.0% of V, 0.10-0.30% of Ti, and the remains are Fe and ineluctable impurities. The high chromium cast iron is based on V and Ti alloyage improvement, tissue is refined, and a hard carbide is precipitated, furthermore high wear resistance is realized; by adding a few of V and Ti elements and properly adjusting the Si content, tissue state of the high chromium cast iron can be obviously improved, excellent comprehensive mechanical property can be obtained, and impact toughness and wear resistance are obviously increased. The method has the advantages of simple process and strong operationality, compared with a composite tube lined high chromium cast iron prepared by the current technology, impact toughness is better, hardness is high, and abrasion resistance performance is greatly increased.

Description

technical field [0001] The invention belongs to the field of wear-resistant metal materials, in particular to a high-wear-resistant high-chromium cast iron for bimetallic composite pipes and a preparation method thereof. Background technique [0002] High chromium cast iron has high chromium content, good hardness, corrosion resistance and oxidation resistance, and has higher toughness than ordinary white iron, so it is widely used in various abrasive wear occasions and various high-temperature wear and corrosion and wear conditions; it has a wide range of applications in the fields of mining, electric power, cement, machinery and refractory materials. At present, high-chromium cast iron grinding balls have been widely used in dry ball mills in the electric power and building materials industries, and high-chromium cast iron grinding balls in wet ball mills in metallurgical mines also have good wear resistance. [0003] In recent years, in order to make the same wear-resist...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/06C21D5/00C21D1/18
CPCC22C37/10C21D1/18C21D5/00C22C37/06
Inventor 王建玲杨跃辉李敬孙秀伟梁国俐马良张洪潮
Owner TANGSHAN COLLEGE
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