High-carbon wire with uniform internal material and manufacturing method thereof

A manufacturing method and wire rod technology, applied in the manufacture of tools, furnaces, heat treatment equipment, etc., can solve the problems of high work hardening rate, uneven material, high initial strength, etc., and achieve the effect of excellent drawing processability

Active Publication Date: 2021-10-29
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

As a result, the initial strength of the surface portion is higher than that of the central portion, and the work hardening rate is higher, so the material is not uniform during drawing.

Method used

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  • High-carbon wire with uniform internal material and manufacturing method thereof
  • High-carbon wire with uniform internal material and manufacturing method thereof
  • High-carbon wire with uniform internal material and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 11

[0096] After casting an ingot (70Kg) that satisfies the alloy composition shown in Table 1, heat it in a heating furnace at 1100°C for about 2 hours, then take it out from the heating furnace, and roll it at a temperature above 900°C to form a wire diameter of 13mm. wire. Then, the rolled wire rod is cooled by water cooling, and then coiled at 750°C to 950°C.

[0097] Then, place the coiled wire on the stelmor (stelmor) line, adjust the holding time by adjusting the air supply volume or immersing in a salt bath to adjust the temperature of the 50°C region before the phase change of the wire is heated, that is, 490 The cooling rate between ℃ and 630 ℃ is controlled to be 5 ℃ / s-30 ℃ / s, and the cooling time of the phase change heating zone is controlled to be 2 seconds to 20 seconds, and the cooling is carried out in this way.

Embodiment 12 to 17

[0099] In embodiments 1 to 11, at least one of boron (B): 0.0003% to 0.0008% or cobalt (C0): 0.01 to 0.015% is selectively added, except that the others are the same as in embodiments 1 to 11 .

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Abstract

The invention discloses a high-carbon wire with uniform inner material and a manufacturing method thereof. According to an embodiment of the present invention, a high-carbon wire rod having a uniform internal material and high drawability contains carbon (C): 0.8% to 1.0%, silicon (Si): 0.15% to 1.5%, and manganese in % by weight. (Mn): 0.2% to 0.8%, chromium (Cr): 0.2% to 0.8%, aluminum (A1): less than or equal to 0.05% (except 0), the balance of Fe and other unavoidable impurities, the pearlite phase As a matrix structure, and satisfy the following formula (1), (1) 5≤C*N≤15 wherein, C represents the content of carbon (weight %), and N represents the radius from the surface to 0.5R when the radius of the wire is R Measured pearlite cluster (Nodule) size (μm).

Description

technical field [0001] The invention relates to a high-carbon wire with uniform internal material and high drawing workability and a manufacturing method thereof. Background technique [0002] High-strength wire rods with a wire diameter of 10mm to 15mm are made into high-strength steel wires through heat treatment and processing, and steel wires are used in various forms throughout the industry. Typical forms are steel wire ropes for suspension bridges, cable-stayed bridges and other bridges, PC steel wires for concrete reinforcement, steel wire ropes for large buildings or structures, and anchor ropes for supporting offshore oil fields or various structures. )Wait. [0003] When high-strength wire rods are processed into steel wires, they are usually drawn. This is because drawing allows more cold work than other processing conditions, so that the work hardening effect can be maximized. [0004] In addition, controlling the microstructure to pearlite composed of a layere...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/18C21D8/06
CPCC21D8/065C21D2211/009C22C38/02C22C38/04C22C38/06C22C38/18C21D8/06C21D9/525C22C38/22C22C38/32
Inventor 朴焌学朴龙植朴世元
Owner 浦项股份有限公司
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