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A kind of nitrogen-containing high-chromium wear-resistant steel and its preparation process

A preparation process and wear-resistant steel technology, which is applied in the field of wear-resistant materials, can solve the problems of low content of solid solution alloy elements, high content of impurity elements, and coarsening of austenite, and achieve high grain refinement and strong strength. Enhanced toughness and improved hardenability

Active Publication Date: 2018-02-23
安徽中建材开源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the existing technology has improved the wear resistance to a certain extent, its high content of impurity elements is not conducive to the improvement of the overall mechanical properties, and its high carbon content leads to low content of solid solution alloy elements and poor hardenability. Excessive carbon will coarsen the austenite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A nitrogen-containing high-chromium wear-resistant steel is composed of the following parts by mass: carbon 2.05%, silicon 1.27%, chromium 23.8%, copper 0.42%, boron 0.09%, nitrogen 0.18%, nickel 1.25%, molybdenum 0.13%, scandium 0.007% %, manganese 0.28%, phosphorus 0.015%, sulfur 0.017%, and the balance is iron.

[0029] The preparation process of nitrogen-containing high-chromium wear-resistant steel, the preparation steps are as follows:

[0030] 1) Heat iron, manganese, and chromium to 1280°C, then add silicon, nickel, molybdenum, scandium, and nitrogen, continue to heat up to melting, and conduct component analysis and adjustment;

[0031] 2) After adjusting the temperature to 1555°C, carry out oxidation treatment, and then add boron to carry out a modification;

[0032] 3) Spray coke powder to foam and remove slag, remove slag, then add inoculant for secondary deterioration, and keep warm for 30 minutes;

[0033] 4) Put copper into the bottom of the ladle, then...

Embodiment 2

[0038] A nitrogen-containing high-chromium wear-resistant steel is composed of the following parts by mass: carbon 2.08%, silicon 1.3%, chromium 24.2%, copper 0.45%, boron 0.08%, nitrogen 0.17%, nickel 1.36%, molybdenum 0.14%, scandium 0.006 %, manganese 0.3%, phosphorus 0.013%, sulfur 0.012%, and the balance is iron.

[0039] The preparation process of nitrogen-containing high-chromium wear-resistant steel, the preparation steps are as follows:

[0040] 1) Heat iron, manganese, and chromium to 1300°C, then add silicon, nickel, molybdenum, scandium, and nitrogen, continue to heat up to melting, and conduct component analysis and adjustment;

[0041] 2) After adjusting the temperature to 1550°C, carry out oxidation treatment, and then add boron to carry out a metamorphosis;

[0042] 3) Spray coke powder to foam and remove slag, remove slag, then add inoculant for secondary deterioration, and keep warm for 32 minutes;

[0043] 4) Put copper into the bottom of the ladle, then a...

Embodiment 3

[0048] A nitrogen-containing high-chromium wear-resistant steel is composed of the following parts by mass: carbon 1.95%, silicon 1.32%, chromium 24.6%, copper 0.43%, boron 0.13%, nitrogen 0.2%, nickel 1.4%, molybdenum 0.11%, scandium 0.009% %, manganese 0.32%, phosphorus 0.016%, sulfur 0.02%, and the balance is iron.

[0049] The preparation process of nitrogen-containing high-chromium wear-resistant steel, the preparation steps are as follows:

[0050] 1) Heat iron, manganese, and chromium to 1260°C, then add silicon, nickel, molybdenum, scandium, and nitrogen, continue to heat up to melting, and conduct component analysis and adjustment;

[0051] 2) After adjusting the temperature to 1558°C, carry out oxidation treatment, and then add boron to carry out a metamorphosis;

[0052] 3) Spray coke powder to foam and remove slag, remove slag, then add inoculant for secondary deterioration, and keep warm for 35 minutes;

[0053] 4) Put copper into the bottom of the ladle, then a...

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Abstract

The invention provides nitrogen-containing high-chromium abrasion-resistant steel and a preparation technique thereof. The nitrogen-containing high-chromium abrasion-resistant steel is prepared from, by mass, 1.95%-2.08% of carbon, 1.24%-1.35% of silicon, 23.5%-24.8% of chromium, 0.4%-0.45% of copper, 0.08%-0.13% of boron, 0.15%-0.2% of nitrogen, 1.2%-1.4% of nickel, 0.11%-0.14% of molybdenum, 0.005%-0.009% of scandium, 0.25%-0.4% of manganese, 0-0.02% of phosphorus, 0-0.02% of sulfur and the balance ferrum. The nitrogen-containing high-chromium abrasion-resistant steel is prepared through the steps of smelting, pouring, quenching, tempering and the like, and the hardenability and abrasion resistance can be improved through the high chromium content; the scandium element can be evenly dispersed into alloy under the high-temperature nitrogen introduction condition, and thus the toughness is remarkably improved; and by adding the nitrogen element, metal nitride can be generated easily, and the hardness is enhanced.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a nitrogen-containing high-chromium wear-resistant steel and a preparation process thereof. Background technique [0002] Wear is one of the main forms of workpiece failure. Wear causes a large consumption of energy and raw materials. According to incomplete statistics, 1 / 3 to 1 / 2 of energy is consumed by friction and wear. In the industrial field, abrasive wear and adhesive wear account for the largest proportion of workpiece wear failures, while wear failure modes such as erosion, corrosion, fatigue, and fretting often occur in the operation of some important components, so they are increasingly paid attention to. In recent years, the strengthening technology of iron and steel materials has developed rapidly, and related new technologies and new processes have emerged in an endless stream. According to different needs, the types and contents of components are a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/54C22C38/42C22C38/02C22C38/44C22C38/04C21D6/00C21D1/18
CPCC21D1/18C21D6/004C21D2211/008C22C38/001C22C38/005C22C38/02C22C38/04C22C38/42C22C38/44C22C38/54
Inventor 汪德发余芳有徐超李英虎陈友琴
Owner 安徽中建材开源新材料科技有限公司
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