High-carbon steel wire rod with double repetitive phase structure and manufacturing method of high-carbon steel wire rod

Abstract

The invention provides a high-carbon steel wire rod with a double-repetition-phase structure and a manufacturing method of the high-carbon steel wire rod. The high-strength and high-toughness alloy steel comprises the following components in percentage by mass: 0.60 percent to 0.65 percent of C, 0.15 percent to 0.25 percent of Si, 0.47 percent to 0.58 percent of Mn, 0.0030 percent to 0.015 percent of P, 0.0020 percent to 0.015 percent of S, 0.0015 percent to 0.0060 percent of N, 0.01 percent to 0.04 percent of Cr, 0.01 percent to 0.04 percent of Ni, 0.01 percent to 0.04 percent of Cu, 0.0008 percent to 0.005 percent of As, 0.0001 percent to 0.0005 percent of Sn, 0.0001 percent to 0.0005 percent of Ti, 0.0008 percent to 0.0020 percent of total oxygen, 0.0001 percent to 0.0015 percent of acid-soluble aluminum and the balance of iron and inevitable impurities. The high-carbon steel wire rod provided by the invention is matched with a corresponding production process to form a double repetitive phase structure with a pearlite lamellar structure and a pellet structure, an automobile control wire with a monofilament diameter of 0.14 mm is prepared, the fatigue life reaches at least 20,000 times, and the quality of the wire rod meets the quality requirements of safety parts such as high-grade automobile control wires of users.

Description

technical field [0001] The invention relates to the field of wire rod products, in particular to a high-carbon steel wire rod with a double-repeated phase structure and a manufacturing method thereof. Background technique [0002] High carbon steel wire rods used in the production of steel cords, bead wires, automotive control wires and elevator ropes need to have high strength and excellent service performance to meet the requirements of safe operation of machinery and equipment such as automobiles. The organization state of these wire rods is fine pearlite, and the lamellar structure of fine pearlite organization is used to improve the tensile strength of the wire rod. During the wire rod drawing process, the fine pearlite lamellae are gradually refined, the dislocation density in the ferrite is gradually increased, and the strength of the steel wire is increased. Too high dislocation density is easy to develop into micro cracks, which reduces the drawing performance and ...

AI Technical Summary

Problems solved by technology

[0004] The focus of this patent application is to optimize the production process of wire rods to achieve the purpose of improving the drawing performance of wire rods, but this patent does not consider the fatigue life of metal products made of wire rods

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