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High-carbon hot-rolled steel

A high-carbon hot-rolled steel, finishing rolling technology, applied to high-carbon hot-rolled steel. It can solve problems such as easy cracking and poor plastic deformation ability, and achieve the effects of slow diffusion, optimized rolling system, and improved mechanical properties.

Inactive Publication Date: 2015-01-21
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

[0002] Generally, high carbon steel has high strength and hardness, high elastic limit and fatigue limit, but has poor plastic deformation ability and is easy to crack during rolling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of high-carbon hot-rolled steel, the mass percent of its contained chemical element is as follows:

[0017] C:0.68%;Si:0.27%;Cr:0.4%;Mn:0.7%;Ni:0.05%;Al:0.012%;W:0.08%;Mo:0.09%;S:0.02%;P:0.03%; The remainder is Fe;

[0018] According to above-mentioned proportioning, prepare described high-carbon hot-rolled steel according to the following steps:

[0019] S1: Smelting, according to the mass percentage of chemical elements, after configuring each raw material, adding the molten steel to the converter for melting, hoisting the molten steel to the ladle refining furnace for refining, after being released at 1540°C, the molten steel is poured to protect the casting, and the temperature of the tundish is controlled at 1500°C to obtain Ingot;

[0020] S2: Rolling. After heating the ingot obtained in S1 to 1105°C, after rough rolling, intermediate rolling, pre-finish rolling, and finish rolling, it is cooled to obtain the high-carbon hot-rolled steel. The rolling tem...

Embodiment 2

[0022] A kind of high-carbon hot-rolled steel, the mass percent of its contained chemical element is as follows:

[0023] C: 0.70%; Si: 0.25%; Cr: 0.6%; Mn: 0.6%; Ni: 0.06%; Al: 0.01%; W: 0.1%; Mo: 0.05%; S: 0.02%; P: 0.03%; The remainder is Fe;

[0024] According to above-mentioned proportioning, prepare described high-carbon hot-rolled steel according to the following steps:

[0025] S1: Smelting, according to the mass percentage of chemical elements, after configuring each raw material, adding the converter to melt, hoisting the molten steel to the ladle refining furnace for refining, after being released from the furnace at 1545°C, the molten steel is poured to protect the casting, and the temperature of the tundish is controlled at 1495°C to obtain Ingot;

[0026] S2: Rolling. After heating the ingot obtained in S1 to 1120°C, after rough rolling, intermediate rolling, pre-finish rolling, and finish rolling, it is cooled to obtain the high-carbon hot-rolled steel. The r...

Embodiment 3

[0028] A kind of high-carbon hot-rolled steel, the mass percent of its contained chemical element is as follows:

[0029] C: 0.66%; Si: 0.29%; Cr: 0.3%; Mn: 0.8%; Ni: 0.04%; Al: 0.014%; W: 0.05%; Mo: 0.12%; S: 0.02%; P: 0.03%; The remainder is Fe;

[0030] According to above-mentioned proportioning, prepare described high-carbon hot-rolled steel according to the following steps:

[0031] S1: Smelting, according to the mass percentage of chemical elements, after configuring each raw material, adding the converter to melt, hoisting the molten steel to the ladle refining furnace for refining, after being released from the furnace at 1535°C, the molten steel is poured to protect the casting, and the temperature of the tundish is controlled at 1505°C to obtain Ingot;

[0032] S2: Rolling. After heating the ingot obtained in S1 to 1100°C, after rough rolling, intermediate rolling, pre-finish rolling, and finish rolling, it is cooled to obtain the high-carbon hot-rolled steel. The...

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Abstract

The invention discloses a high-carbon hot-rolled steel which comprises the following chemical elements in percentage by mass: 0.66-0.70% of C, 0.25%-0.29% of Si, 0.3%-0.6% of Cr, 0.6%-0.8% of Mn, 0.04%-0.06% of Ni, 0.01%-0.014% of Al, 0.05%-0.1% of W, 0.05%-0.12% of Mo, 0-0.02% of S, 0-0.03% of P and the balance of Fe; the high-carbon hot-rolled steel is prepared by the following steps: according to the mass percentage of chemical elements, mixing all the raw materials; melting in a converter and refining molten steel in a ladle refining furnace, tapping off at 1535-1545DEG C, injecting molten steel and carrying out protective atmosphere pouring, controlling the temperature of a tundish to be 1495-1505DEG C to obtain an ingot; heating the obtained ingot to 1100-1120DEG C, performing rough rolling, medium rolling, finish rolling, and cooling, to obtain the high-carbon hot-rolled steel, wherein the rolling temperature of finish rolling is 900-910DEG C.

Description

technical field [0001] The invention belongs to the technical field of iron and steel materials, and in particular relates to a high-carbon hot-rolled steel. Background technique [0002] Generally, high carbon steel has high strength and hardness, high elastic limit and fatigue limit, but has poor plastic deformation ability and is easy to crack during rolling. Due to its good strength and hardness, high carbon steel can withstand greater pressure during use, and has strong wear resistance, long service life, good performance and economy, but poor plastic deformation ability and low The toughness of high carbon steel is an important limiting factor for the expansion of the use range of high carbon steel, which needs to be improved. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a high-carbon hot-rolled steel, which has good toughness on the basis of maintaining the strength and hardness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C33/04
CPCC22C38/44C21D8/005C22C33/04C22C38/02C22C38/04C22C38/18C22C38/40
Inventor 郑洪
Owner 合肥市伟远金属材料有限公司
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