Medium carbon steel wire rod with high strength and high plasticity and production method thereof

A production method and high plasticity technology, applied in the field of wire rod production, to achieve the effect of reducing fluctuation, increasing strength and improving performance

Active Publication Date: 2019-01-18
吕梁建龙实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] None of the steel types mentioned in the above patents provide a

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  • Medium carbon steel wire rod with high strength and high plasticity and production method thereof
  • Medium carbon steel wire rod with high strength and high plasticity and production method thereof
  • Medium carbon steel wire rod with high strength and high plasticity and production method thereof

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Example Embodiment

[0034] Example 1

[0035] The specification of the medium carbon steel wire rod with high strength and high plasticity in this embodiment is Φ5.5mm, and its chemical composition and mass percentage are shown in Table 1.

[0036] The production method of medium carbon steel wire rod with high strength and high plasticity in this embodiment includes smelting, billet heating, wire rod rolling and wire rod cooling. The specific process steps are as follows:

[0037] (1) Smelting process: The smelting process includes molten iron desulfurization treatment, top and bottom combined blowing converter smelting, LF+RH dual refining, the chemical composition of the molten steel and its mass percentage are shown in Table 1; the molten steel is continuously cast into billets after smelting;

[0038] (2) Billet heating process: The billet heating process includes continuous casting billet heating and hot rolling billet heating. The heating furnace temperature is 1180℃; the total heating time of cont...

Example Embodiment

[0109] Table 2 Example 1-8 and Comparative Example 1 Wire rod organization and performance

Example Embodiment

[0042] Example 2

[0043] The specification of the medium carbon steel wire rod with high strength and high plasticity in this embodiment is Φ10mm, and its chemical composition and mass percentage are shown in Table 1.

[0044] The production method of medium carbon steel wire rod with high strength and high plasticity in this embodiment includes smelting, billet heating, wire rod rolling and wire rod cooling. The specific process steps are as follows:

[0045] (1) Smelting process: The smelting process includes molten iron desulfurization treatment, top and bottom combined blowing converter smelting, LF+RH dual refining, the chemical composition of the molten steel and its mass percentage are shown in Table 1; the molten steel is continuously cast into billets after smelting;

[0046] (2) Billet heating process: The billet heating process includes continuous casting billet heating and hot rolling billet heating. The heating furnace temperature is 1184°C; the total heating time of the ...

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Abstract

The invention discloses a medium carbon steel wire rod with high strength and high plasticity and a production method thereof. The medium carbon steel wire rod comprises the following one or more chemical components in percentage by weight: 0.40 to 0.50 percent of C, 0.15 to 0.40 percent of Si, 0.70 to 1.20 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.010 percent of S, less than or equal to 0.05 percent of Al, less than or equal to 0.05 percent of Ti, less than or equal to 0.005 percent of B, less than or equal to 0.40 percent of Cr and the balance of Fe andunavoidable impurities; the production method comprises the processes of melting, heating billet, wire rod rolling and wire rod cooling. The tensile strength of the medium carbon steel wire rod is larger than or equal to 700 MPa, the reduction of are is larger than or equal to 55 percent, the elongation is larger than or equal to 28 percent; the microscopic structure is formed by granular ferriteand fine lamellar pearlite, the particle size of the ferrite is 7 to 9 grade, the Wechsler tissue level is less than or equal to 1 grade; the steel wire rod used by drawing of a client can keep highstrength and plasticity index.

Description

technical field [0001] The invention belongs to the technical field of wire rod production, and in particular relates to a medium-carbon steel wire rod with high strength and high plasticity and a production method thereof. Background technique [0002] Medium carbon structural steel is mainly used in the production of various shaft parts, used in automobile, machinery and other industries, and requires good strength and plasticity indicators. Since the wire rod needs subsequent drawing and surface grinding treatment, its strength and plasticity are mainly guaranteed by the performance of the base metal hot-rolled wire rod. According to the knowledge of materials science, strength and plasticity are a pair of contradictory indicators, that is, when the strength is increased, the plasticity index will be reduced at the same time. [0003] Patent No. CN102011051A discloses a "high-strength and high-plasticity medium-carbon transformation-induced plasticity steel and its prepa...

Claims

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Application Information

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IPC IPC(8): C21D8/06C22C38/02C22C38/04C22C38/06C22C38/14C22C38/28C22C38/32
CPCC21D8/065C21D2211/005C21D2211/009C22C38/002C22C38/02C22C38/04C22C38/06C22C38/14C22C38/28C22C38/32
Inventor 阮士朋田新中董庆王利军王宁涛张鹏王冬晨郭晓培李世琳
Owner 吕梁建龙实业有限公司
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