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Preparation method of tempered martensite wear-resistant steel ball with complex phase precipitated TiC particles

A technology of tempering martensite and wear-resistant steel, which is applied to furnace types, manufacturing tools, heat treatment equipment, etc., and can solve problems such as increased production costs, out-of-round and broken steel balls, and coarse structure of steel balls, so as to enhance the strength of the matrix , grain refinement and low production cost

Active Publication Date: 2020-08-04
TONGLING YOUSE JINSHEN WEAR RESISTANT MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent application CN1189542 discloses a multi-element micro-alloyed air-cooled bainite steel. This material does not require complex heat treatment processes. After forging or rolling, it can be air-cooled to obtain grinding balls with bainite / martensite as the main structure. , but in order to improve the hardenability and hardness of the material, a large amount of microalloying elements must be added, such as Nb, V, Ti, RE, etc., which greatly increases the production cost; in addition, because there is no isothermal treatment process, the bainite / There are differences in the proportion of the martensitic multiphase structure, resulting in fluctuations in the final properties
However, this method uses a casting process to produce wear-resistant steel balls. Casting defects such as air bubbles or looseness are easily generated inside the steel balls, so that the internal structure of the steel balls is thick, especially at the pouring gate, which easily causes uneven hardness, resulting in steel balls. out of round broken

Method used

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  • Preparation method of tempered martensite wear-resistant steel ball with complex phase precipitated TiC particles
  • Preparation method of tempered martensite wear-resistant steel ball with complex phase precipitated TiC particles
  • Preparation method of tempered martensite wear-resistant steel ball with complex phase precipitated TiC particles

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] First, smelt and cast according to the above composition range, and then detect the composition of the continuous casting round billet, see Table 1.

[0045] Table 1 Composition of continuous casting round slabs (wt.%)

[0046]

[0047] The continuous casting round billet with a diameter of Φ300mm is homogenized and heated in a five-stage heating furnace for 4 hours, wherein the temperature of the preheating section is 560-570°C, the temperature of the heating section is 690-840°C, and the temperature of the second section is 1020-1080°C °C, soaking stage 1 temperature is 1110-1200°C, soaking stage 3 temperature is 1200°C. After the round billet comes out of the heating furnace and is descaled by water, the rolling start temperature is controlled at about 1050°C and enters the rolling process. After rough rolling with 4 stands alternately arranged vertically and horizontally, intermediate rolling with 2 stands and finish rolling with 10 stands, the final rolling tem...

Embodiment 2

[0056] First, smelt and cast according to the above composition range, and then detect the composition of the continuous casting round billet, see Table 5.

[0057] Table 5 Composition of continuous casting round slabs (wt.%)

[0058]

[0059]The continuous casting round billet with a diameter of Φ300mm is homogenized and heated in a five-stage heating furnace for 4 hours, wherein the temperature of the preheating section is 560-570°C, the temperature of the heating section is 690-840°C, and the temperature of the second section is 1020-1080°C °C, soaking stage 1 temperature is 1110-1200°C, soaking stage 3 temperature is 1200°C. After the round billet comes out of the heating furnace and is descaled by water, the rolling start temperature is controlled at about 1050°C and enters the rolling process. After rough rolling with 4 stands alternately arranged vertically and horizontally, intermediate rolling with 2 stands and finish rolling with 10 stands, the final rolling temp...

Embodiment 3

[0068] First, smelt and cast according to the above composition range, and then detect the composition of the continuous casting round billet, see Table 9.

[0069] Table 9 Composition (wt.%) of continuous casting round billet

[0070]

[0071] The continuous casting round billet with a diameter of Φ300mm is homogenized and heated in a five-stage heating furnace for 4 hours, wherein the temperature of the preheating section is 560-570°C, the temperature of the heating section is 690-840°C, and the temperature of the second section is 1020-1080°C °C, soaking stage 1 temperature is 1110-1200°C, soaking stage 3 temperature is 1200°C. After the round billet comes out of the heating furnace and is descaled by water, the rolling start temperature is controlled at about 1050°C and enters the rolling process. After rough rolling with 4 stands alternately arranged vertically and horizontally, intermediate rolling with 2 stands and finish rolling with 10 stands, the final rolling te...

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Abstract

The invention discloses a preparation method of a tempered martensite wear-resistant steel ball with complex phase precipitated TiC particles, and belongs to the technical field of metal material machining. The wear-resistant steel ball is prepared from the following alloy components: by weight, C: 0.65-0.9 wt%, Si: 1.5-3.0 wt%, Mn: 0.5-2.0 wt%, Cr: 0.5-1.5 wt%, Ti: 1-2%, and the balance Fe and inevitable impurities. A forging waste heat quenching (without reheating) and a low-temperature tempering process are adopted to obtain a high-hardness tempered martensite structure, meanwhile, second phase particles are precipitated in a matrix, the strength and the wear resistance of the material are guaranteed through the second phase particles with different scales distributed in a dispersed mode, the strength of the matrix is improved through nano-scale precipitated particles, and the wear resistance of the material is improved through micron-scale precipitated particles. Under the alloy system, Ti elements with different contents are added, so that the comprehensive performance of the material is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and relates to a preparation method of a tempered martensitic wear-resistant steel ball in which TiC particles are precipitated in multiple phases. Background technique [0002] It is necessary to intensify the research on steel materials, focusing on the development of high-performance, lightweight steel materials that can adapt to a variety of harsh environments, so as to adapt to the rapid development of social productivity. Wear is the main form of damage in the service process of metal products, but the economic losses it causes in modern industry are quite alarming. Therefore, on the premise of reasonably controlling the production cost of wear-resistant products, improving wear efficiency and optimizing service life are of great significance to mining, construction and other industries. This paper summarizes the relevant journal literature at home and abroad. From the pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/28C22C38/34C22C38/38B23P15/00C21D9/36C22C38/04
CPCB23P15/00C21D9/36C21D2211/001C21D2211/004C21D2211/008C22C38/04C22C38/28C22C38/34C22C38/38
Inventor 汪军段东王常志于浩路远陈永峰宋邦民
Owner TONGLING YOUSE JINSHEN WEAR RESISTANT MATERIAL
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