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Medium and high-carbon Bainite steel and preparation method thereof

A technology of carbon bainitic steel and molten steel, applied in the field of medium and high carbon bainitic steel and its preparation, can solve the problems of limited resources, difficult to guarantee product quality, increase steel price, etc., achieve high comprehensive mechanical properties and simplify production process , The effect of low manufacturing cost

Inactive Publication Date: 2010-11-24
四川贝氏新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the content of Mo in this type of bainitic steel is generally about 0.5%, Mo is a precious element, and resources are limited, which increases the price of steel and greatly limits the application of this type of steel.
[0006] The existing bainitic steel production methods all use austempering process, so the current production of bainitic steel basically adopts the rolling process to produce wear-resistant plates, the phase change treatment process is complicated and time-consuming, and the product quality is difficult to guarantee , has been far from meeting the needs of the metal wear-resistant industry

Method used

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  • Medium and high-carbon Bainite steel and preparation method thereof
  • Medium and high-carbon Bainite steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: A medium-high carbon bainite steel composed of alloying elements of the following mass percentages:

[0051] C 0.22%;

[0052] Si 0.22%;

[0053] Mn 1.21%;

[0054] Cr 0.4%;

[0055] The rest are iron and impurity elements.

[0056] The preparation method includes the following steps:

[0057] A. The raw materials configured in proportion are smelted in an intermediate frequency furnace or electric arc furnace by conventional methods, and Al and CaSi are added for deoxidation;

[0058] B. The smelted raw materials are refined outside the furnace, and blank products are produced through sand casting or investment casting processes;

[0059] C. The blank is heated to 400~700℃, kept for 30~210 minutes, heated to 800~1300℃,

[0060] Keep heat for 30~180 minutes, cool off for 5~30 minutes, cool to 400~100℃, temper, keep heat for 1~5 hours;

[0061] D. Air-cool to room temperature.

[0062] Preferably, the Al added in the step A accounts for 0.1% to 0.2% of the mass of the molten s...

Embodiment 2

[0064] Embodiment 2: A medium-high carbon bainite steel, composed of the following alloy elements by mass percentage:

[0065] C 0.33%;

[0066] Si 0.83%;

[0067] Mn 2.69%;

[0068] Cr 0.46%;

[0069] The rest are iron and impurity elements. The performance parameters are shown in Table 1.

[0070] The preparation method is the same as in Example 1.

Embodiment 3

[0071] Example 3: A medium-high carbon bainite steel, composed of alloying elements with the following mass percentages:

[0072] C 0.55%;

[0073] Si 1.02%;

[0074] Mn 2.34%;

[0075] Cr 1.26%;

[0076] The rest are iron and impurity elements. The performance parameters are shown in Table 1.

[0077] The preparation method is the same as in Example 1.

[0078] Table 1 Table of mechanical properties of the invention

[0079]

[0080] The mechanical performance detection experiment method of the present invention is implemented according to the relevant requirements of GB / T230.1-2004, GB / T229-1994 and GB / T11352-2009.

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Abstract

The invention discloses medium and high-carbon Bainite steel. The medium-high carbon Bainite steel comprises the following components in percentage by mass: 0.1 to 0.7 percent of C, 0 to 2.5 percent of Si, 0.5 to 4.5 percent of Mn, 0.2 to 3.5 percent of Cr and the balance of iron and impurity elements. The medium-high carbon Bainite steel of the invention has the characteristics of low manufacturing cost, simple production process, excellent comprehensive mechanical property and the like.

Description

Technical field [0001] The invention belongs to the field of metal materials, and particularly relates to a medium-high carbon bainite steel and a preparation method thereof. Background technique [0002] At present, the most widely used metal wear-resistant materials mainly include wear-resistant cast iron and wear-resistant steel. Wear-resistant cast iron is mainly chromium-containing cast iron. Although it has high hardness, its brittleness is also high, and it is not suitable for applications with large impact. At the same time, due to the high content of alloying elements such as chromium in wear-resistant cast iron, its cost is increased. Wear-resistant cast steel is a type of alloy steel widely used in various wear conditions. For more than 100 years, new wear-resistant cast steel types have emerged in endlessly. Its smelting, casting, heat treatment and machining processes have also been continuously improved. The comprehensive mechanical properties, abrasion resistance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C21C7/06C21C7/00C21D1/18
Inventor 余忠友胡伯述汪慧莲
Owner 四川贝氏新材料有限公司