Medium/low carbon manganese steel

A carbon-manganese steel and chemical element technology, applied in the field of medium and low carbon manganese steel, can solve problems such as insufficient performance, and achieve the effect of good toughness and red hardness

Inactive Publication Date: 2015-01-28
合肥市伟远金属材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, manganese steel usually uses high manganese content and high carbon content, so that while the manganese steel has high mechanical strength, other properties are insufficient, and it needs to be improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of medium and low carbon manganese steel, the mass percent of its contained chemical element is as follows:

[0019] C: 0.25%; Si: 0.3%; Cr: 0.25%; Mn: 4.9%; Ni: 0.3%; Nb: 0.005%; Al: 0.12%; V: 0.008%; B: 1.3%; Mo: 0.9%; S: 0.01%; P: 0.02%; the rest is Fe;

[0020] During the preparation process, the medium and low carbon manganese steel is prepared according to the above ratio and in accordance with the following steps:

[0021] S1: Smelting, put pig iron and scrap iron into the furnace in a ratio of 1:2 as the source of iron base, after desulfurization and deoxidation, add Si, Ni, V, Mn, Nb, Mo, Al, Cr, B, W in sequence Alloying, the time interval between adding each element is 2 minutes, refining and casting with refining agent after alloying to obtain ingots;

[0022] S2: heat treatment, put the cast ingot obtained in S1 into a heat treatment furnace, first raise the temperature from room temperature to 915°C at a rate of 175°C / h, and keep it for 3.5h; then...

Embodiment 2

[0024] A kind of medium and low carbon manganese steel, the mass percent of its contained chemical element is as follows:

[0025] C: 0.3%; Si: 0.25%; Cr: 0.3%; Mn: 4.6%; Ni: 0.4%; Nb: 0.004%; Al: 0.14%; V: 0.005%; B: 1.6%; Mo: 0.6%; S: 0.01%; P: 0.02%; the rest is Fe;

[0026] During the preparation process, the medium and low carbon manganese steel is prepared according to the above ratio and in accordance with the following steps:

[0027] S1: Smelting, put pig iron and scrap iron into the furnace at a ratio of 2:5 as the source of iron base, after desulfurization and deoxidation, add Si, Ni, V, Mn, Nb, Mo, Al, Cr, B, W in sequence Alloying, the time interval between adding each element is 1.8 minutes, after alloying, use refining agent to refine and cast to obtain ingot;

[0028] S2: heat treatment, put the ingot obtained in S1 into a heat treatment furnace, firstly raise the temperature from room temperature to 920°C at a rate of 170°C / h, and keep it for 3h; then cool i...

Embodiment 3

[0030] A kind of medium and low carbon manganese steel, the mass percent of its contained chemical element is as follows:

[0031] C: 0.2%; Si: 0.35%; Cr: 0.2%; Mn: 5.2%; Ni: 0.2%; Nb: 0.006%; Al: 0.10%; V: 0.01%; B: 1.2%; Mo: 1.2%; S: 0.02%; P: 0.03%; the rest is Fe;

[0032] During the preparation process, the medium and low carbon manganese steel is prepared according to the above ratio and in accordance with the following steps:

[0033] S1: Smelting, put pig iron and scrap iron into the furnace in a ratio of 2:3 as the source of iron base, after desulfurization and deoxidation, add Si, Ni, V, Mn, Nb, Mo, Al, Cr, B, W in sequence Alloying, the time interval between adding each element is 1.5 minutes, after alloying, use refining agent to refine and cast to obtain ingot;

[0034] S2: heat treatment, put the ingot obtained in S1 into a heat treatment furnace, firstly raise the temperature from room temperature to 910°C at a rate of 180°C / h, and keep it for 4 hours; then co...

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PUM

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Abstract

The invention discloses medium/low carbon manganese steel which comprises the following chemical elements in percentage by mass: 0.2-0.3% of C, 4.6-5.2% of Mn, 1.2-1.6% of B, 0.25-0.35% of Si, 0.2-0.3% of Cr, 0.2-0.4% of Ni, 0.004-0.006% of Nb, 0.10-0.14% of Al, 0.005-0.01% of V, 0.6-1.2% of Mo, 0-0.02% of S, 0-0.03% of P and the balance of Fe. The medium/low carbon manganese steel is prepared by adding pig iron and waste iron into a furnace according to a ratio of 2:(3-5), performing desulfuration and deoxidation, sequentially adding Si, Ni, V, Mn, Nb, Mo, Al, Cr, B and W, alloying, and refining and casting by using a refining agent, thereby obtaining cast ingots, wherein the time interval for feeding the elements is 1.5-2 minutes; feeding the cast ingots into a thermal treatment furnace, heating to 910-920 DEG C from the room temperature, and keeping the temperature for 3-4 hours; further cooling to 620-630 DEG C, and keeping the temperature for 1-1.5 hours; further cooling to be 300-310 DEG C, and preserving heat for 1-2 hours; further heating to 520-530 DEG C, and preserving heat for 2-3 hours, and taking out for air cooling.

Description

technical field [0001] The invention belongs to the technical field of iron and steel materials, and in particular relates to a medium-low carbon manganese steel. Background technique [0002] Under strong impact and extrusion conditions, manganese steel can rapidly undergo work hardening on the surface, so that it still maintains good toughness and shape of austenite in the core, while the hardened layer has good wear resistance. Therefore, it is widely used to make crushing machinery, ball bearings, rails and other abrasive parts. At the same time, when manganese steel is used as a structural material, it has good strength and can reduce the amount of materials used. In the prior art, manganese steel usually uses high manganese content and high carbon content, so that while the manganese steel has high mechanical strength, other properties are insufficient, and needs to be improved. Contents of the invention [0003] The object of the present invention is to overcome th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/58C22C33/04C21D6/00
Inventor 郑洪
Owner 合肥市伟远金属材料有限公司
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