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Chromium-alloyed cord steel wire rod and production process

A production process, chrome alloy technology, applied in the direction of manufacturing converters, etc., can solve the problems affecting wire rod plasticity, drawing performance and plying performance, high wire breakage rate, etc., to reduce wire breakage rate, reduce manganese content, The effect of reducing carbon content

Active Publication Date: 2020-08-14
JIANGSU YONGGANG GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional cord steel wire rod, that is, non-alloyed cord steel wire rod, mainly improves the strength and performance of the wire rod through the carbon content, but the carbon content affects the plasticity, drawing processing performance and ply processing performance of the wire rod, and the wire rod processing process is broken. Relatively high silk rate

Method used

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  • Chromium-alloyed cord steel wire rod and production process
  • Chromium-alloyed cord steel wire rod and production process
  • Chromium-alloyed cord steel wire rod and production process

Examples

Experimental program
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Effect test

Embodiment 1

[0045] A chromium-alloyed cord steel wire rod YLX70ACr, wherein YLX represents Yonggang cord, and A represents the quality grade of the steel.

[0046] The chemical composition and weight percentage content of the chromium alloyed cord steel wire rod YLX70ACr are:

[0047] C: 0.70%, Mn: 0.30%, Si: 0.20%, Cr: 0.35%, P: 0.007%, S: 0.002%, Ni: 0.01%, Cu: 0.01%, Mo: 0.01%, Al: 0.0009%, Ti: 0.0004%, [O]: 0.0013%, [N]: 0.0022%, and the balance is Fe and unavoidable impurities.

[0048] The production process of the chromium alloyed cord steel wire rod comprises the following steps:

[0049] Step S1, molten steel smelting: pre-desulfurize the raw material molten iron by KR (Kambara Reactor) method, the sulfur content of the molten iron can be stably controlled within 0.005% after desulfurization, the converter adopts top-bottom double blowing, and adopts the double slag method to effectively reduce the phosphorus content To less than 0.010%, adopt sliding plate to stop slag in conv...

Embodiment 2

[0055] A chromium-alloyed cord steel wire rod YLX70ACr, where YLX represents Yonggang cord, and A represents the quality grade of the steel.

[0056] The chemical composition and weight percentage content of the chromium alloyed cord steel wire rod YLX70ACr are:

[0057] C: 0.68%, Mn: 0.40%, Si: 0.30%, Cr: 0.40%, P: 0.008%, S: 0.002%, Ni: 0.01%, Cu: 0.01%, Mo: 0.01%, Al: 0.0008%, Ti: 0.0005%, [O]: 0.0012%, [N]: 0.0020%, and the balance is Fe and unavoidable impurities.

[0058] The production process of the chromium alloyed cord steel wire rod comprises the following steps:

[0059] Step S1, molten steel smelting: pre-desulfurize the raw material molten iron by KR (Kambara Reactor) method, the sulfur content of the molten iron can be stably controlled within 0.005% after desulfurization, the converter adopts top-bottom double blowing, and adopts the double slag method to effectively reduce the phosphorus content To less than 0.010%, adopt sliding plate to stop slag in conver...

Embodiment 3

[0065] A chromium-alloyed cord steel wire rod YLX70ACr, where YLX represents Yonggang cord, and A represents the quality grade of the steel.

[0066]The chemical composition and weight percentage content of the chromium alloyed cord steel wire rod YLX70ACr are:

[0067] C: 0.72%, Mn: 0.20%, Si: 0.15%, Cr: 0.30%, P: 0.007%, S: 0.002%, Ni: 0.01%, Cu: 0.01%, Mo: 0.01%, Al: 0.0007%, Ti: 0.0004%, [O]: 0.0013%, [N]: 0.0022%, and the balance is Fe and unavoidable impurities.

[0068] The production process of the chromium alloyed cord steel wire rod comprises the following steps:

[0069] Step S1, molten steel smelting: pre-desulfurize the raw material molten iron by KR (Kambara Reactor) method, the sulfur content of the molten iron can be stably controlled within 0.005% after desulfurization, the converter adopts top-bottom double blowing, and adopts the double slag method to effectively reduce the phosphorus content To less than 0.010%, adopt sliding plate to stop slag in convert...

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Abstract

The invention provides a chromium-alloyed cord steel wire rod and a production process. The chromium-alloyed cord steel wire rod comprises the following chemical components of, in percentage by weight, 0.68%-0.82% of C, 0.20%-0.40% of Mn, 0.15%-0.30% of Si, 0.30%-0.40% of Cr, less than or equal to 0.012% P, less than or equal to 0.008% of S, less than or equal to 0.05% of Ni, less than or equal to0.05% of Cu, less than or equal to 0.03% of Mo, less than or equal to 0.003% of Al, less than or equal to 0.002% of Ti, less than or equal to 0.002% of [O], less than or equal to 0.005% of [N], and the balance Fe and unavoidable impurities. The production technology comprises the following steps of smelting molten steel, and adding chromium alloy in the converter tapping process; refining to obtain molten steel; carrying out continuous casting on the molten steel obtained after refining to obtain a steel billet; and heating the steel billet to obtain a chromium-alloyed cord steel wire rod, and carrying out controlled cooling on the chromium-alloyed cord steel wire rod. According to the chromium-alloyed cord steel wire rod and the production process, microalloying is adopted, the chromiumcontent is increased, the carbon content and the manganese content are reduced to compensate for the performance of the steel wire rod and the finished steel wire, carbon segregation of the steel wirerod is improved, the net carbon forming probability is reduced, the plasticity and the machining performance of the steel wire rod can be improved at the same time, and the strand combining and wirebreaking rate in the steel wire rod cord machining process is reduced.

Description

technical field [0001] The invention belongs to the technical field of steel wire rods, and in particular relates to a chromium alloyed cord steel wire rod and a production process. Background technique [0002] Cord steel wire rods are wire rods that can be used to produce thin wires that are then twisted into steel cords. Conventional cord steel wire rod, that is, non-alloyed cord steel wire rod, mainly improves the strength and performance of the wire rod through the carbon content, but the carbon content affects the plasticity, drawing processing performance and ply processing performance of the wire rod, and the wire rod processing process is broken. The silk rate is relatively high. Contents of the invention [0003] Aiming at the above-mentioned technical problems, the present invention provides a chromium-alloyed cord steel wire rod and its production process, which uses micro-alloying to increase the content of chromium to compensate for the performance loss of t...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/06C22C38/20C22C38/22C22C38/28C22C38/40C22C38/42C22C38/44C22C38/50C21C5/35C21C5/36C21C7/06C21D8/06
CPCC21C5/35C21C5/36C21C7/06C21D8/065C22C38/02C22C38/04C22C38/06C22C38/18C22C38/20C22C38/22C22C38/28C22C38/40C22C38/42C22C38/44C22C38/50
Inventor 王淼刘荣施宏峻蒋鹏王鲁义石磊纪文杰王薛鹏
Owner JIANGSU YONGGANG GROUP CO LTD
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