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High-carbon wire rod with excellent drawing performance and manufacturing method thereof

A kind of wire rod, excellent technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of cementite fragmentation, micropore change, etc., and achieve the effect of excellent drawing processability

Active Publication Date: 2022-05-27
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

However, when the difference between the arrangement direction of the initial cementite and the drawing direction is large, the possibility of cementite fragmentation becomes higher, which eventually leads to a higher possibility of defects such as microvoids.

Method used

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  • High-carbon wire rod with excellent drawing performance and manufacturing method thereof
  • High-carbon wire rod with excellent drawing performance and manufacturing method thereof
  • High-carbon wire rod with excellent drawing performance and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0068] After casting an ingot (70Kg) having the alloy composition (% by weight) shown in Table 1 below, it was heated in a heating furnace at 1100°C for about 2 hours, and then taken out from the heating furnace and heated at a temperature of 900°C or higher. Down rolled into a wire with a wire diameter of 13mm. Then, the rolled wire rod was water-cooled, coiled at 850°C, and then immersed in a previously prepared nitrate bath at 400°C to 550°C for 5 minutes, and then the longitudinal section of the material was taken out for observation.

[0069] 【Table 1】

[0070]

[0071] 【Table 2】

[0072]

[0073] Invention Examples 1 to 3 contain C: 0.8% to 1.0%, Si: 0.15% to 1.5%, Mn: 0.2% to 0.8%, Cr: 0.2% to 0.8%, Al: 0.05% or less, and the remainder in % by weight Fe and unavoidable impurities are contained in an amount or the balance, and are manufactured by a manufacturing method including a step of cooling the coiled wire by immersing it in 450°C nitrate containing 0.02% t...

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PUM

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Abstract

The invention discloses a high-carbon wire material with cementite arrangement suitable for drawing processing and a manufacturing method thereof. A high-carbon wire rod excellent in drawing performance according to an embodiment of the present invention, which comprises C: 0.8% to 1.0%, Si: 0.15% to 1.5%, Mn: 0.2% to 0.8%, Cr: 0.2% by weight. % to 0.8%, Al: less than or equal to 0.05%, the balance of Fe and unavoidable impurities, in the pearlite group passed by the center line in the longitudinal section with the center line, the center line and cementite The area percentage of the community whose acute angle formed by the arrangement direction is greater than or equal to 60° is less than or equal to 20%.

Description

technical field [0001] The present invention relates to a high-carbon wire rod having a cementite arrangement suitable for drawing and a method for producing the same. Background technique [0002] After heat treatment and processing, high-strength steel wires with a wire diameter of 5mm to 15mm are used for automobile tire cords or bridge cables, PC steel wires for reinforcing concrete, cables for large buildings or structures, and anchors supporting offshore oil fields or various structures. Anchor rope, etc. [0003] When high-strength wire is processed into wire, drawing is usually performed because drawing allows more cold work than other processing conditions to maximize the use of work-hardening effects. The drawing is very advantageous when the microstructure is controlled to be pearlite composed of a layered structure of ferrite and cementite. This is because dislocation generation is very active at the interface between ferrite and cementite during cold working, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/30C22C38/32C21D6/00C21D8/06C21D9/52
CPCC22C38/02C22C38/04C22C38/06C22C38/32C22C38/30C21D8/065C21D9/525C21D6/002C21D6/005C21D6/008C21D6/007C21D2211/009C22C38/34C21D9/0062C21D2211/003
Inventor 朴焌学林东勋李承真朴世元施成奎
Owner 浦项股份有限公司
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