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High manganese wear-resistant steel with excellent weldability

A technology of wear-resistant steel and weldability, which is applied in the field of high-manganese wear-resistant steel, can solve the problems of increased welding cost, deterioration of weldability, high preparation cost, etc., and achieves improved wear resistance and weldability, wear resistance and weldability excellent effect

Active Publication Date: 2018-03-16
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, for thick plates, a large amount of alloying elements are added in order to ensure the hardness at the center of the thickness. In this case, cracks are likely to occur in the welding heat-affected zone during welding. Especially, for thick plates, in order to suppress cracks during welding, Cracking requires high temperature preheating of the material, which deteriorates weldability and eventually leads to an increase in welding costs. Therefore, there will be a problem of limited use. Therefore, for thick plates of wear-resistant steel with excellent weldability, the above-mentioned big problem
In addition, elements such as Cr, Ni, and Mo added to improve hardenability are expensive, so there is a problem that the required preparation costs are high.

Method used

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  • High manganese wear-resistant steel with excellent weldability
  • High manganese wear-resistant steel with excellent weldability
  • High manganese wear-resistant steel with excellent weldability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A slab having a thickness of 80 mm was produced by preparing a steel ingot satisfying the composition in Table 1 below in a vacuum induction melting furnace. This slab was heated at 1050° C. for 50 minutes, and subjected to rough rolling and finish rolling to obtain a 30 mm thick plate. Afterwards, it is subjected to accelerated cooling or air cooling, and part of the finishing temperature is adjusted according to the purpose of the test.

[0075] Table 1

[0076] category

C

mn

Si

Ni

Cr

Mo

Nb

V

Ti

B

33.5C+Mn

Invention Steel 1

0.21

10.2

0.2

_

_

_

_

_

_

_

17

Invention Steel 2

0.35

8.6

0.1

_

_

_

_

_

_

_

20

Invention Steel 3

0.32

9.8

0.2

_

_

_

_

_

_

_

21

Invention Steel 4

0.13

12.2

0.3

_

_

_

_

_

_

_

17

Invention Steel 5

0.41

11.2

0.2

_

_

_

...

Embodiment 2

[0088] Steel plates each having a thickness of 70 mmt having the compositions of Invention Steel 1 and Comparative Steel 5 in Table 1 of Example 1 were prepared.

[0089] Measures the Brinell hardness according to the thickness of the steel plate and displays the results on the Figure 5 middle. exist Figure 5 From the results shown in , it can be confirmed that the hardness distribution of the wear-resistant steel according to the present invention is constant along the thickness direction, whereas the hardness of the center portion of the comparative steel is significantly lowered. Therefore, the closer the wear-resistant steel of the present invention is to the center, the hardness does not decrease, so it can be known that the wear-resistant steel of the present invention has the technical effect that the overall service life will not be reduced.

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Abstract

The present invention relates to a steel used for heavy-duty construction machinery, dump trucks, mining machinery, and conveyors, and more specifically, to a high-manganese wear-resistant steel excellent in weldability.

Description

technical field [0001] The present invention relates to a steel used for heavy-duty construction machinery, dump trucks, mining machinery, and conveyors that require high hardness. More specifically, it relates to a high-manganese wear-resistant steel with excellent weldability. Background technique [0002] At present, wear-resistant steel is used in devices or parts requiring wear-resistant properties in industrial fields such as construction, transportation, mining, and railways. Wear-resistant steel is roughly divided into austenitic work hardening steel and martensitic high hardness steel. [0003] A representative example of austenitic work-hardening steel is Hadfield steel, which contains about 12% by weight of manganese (Mn) and about 1.2% by weight of carbon (C), and its microstructure has the austenitic Body, which is used in various fields such as mining industry, railway field, and military supply field. However, since the initial yield strength is very low at ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C21D8/02C21D9/46C22C38/04
CPCC22C38/04C21D6/005C22C38/14C21D8/005C21D6/008C22C38/02C22C38/002C22C38/12C21D8/02C21D9/46
Inventor 李淳基徐仁植朴仁圭李弘周
Owner 浦项股份有限公司