Rolling process of tire cord steel wire rod
A technology of cord steel and wire rod, which is applied in the direction of metal rolling, etc., can solve the problems of inclusion rating, inability to explain whether the inclusions meet the requirements, etc., and achieve the effect of improving quality, good market prospects, and improving internal quality
Inactive Publication Date: 2014-10-22
HBIS COMPANY LIMITED HANDAN BRANCH COMPANY
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Problems solved by technology
Chinese Patent No. CN103667655A discloses a production process for cord steel wire rods with a diameter of 5mm. Although the tensile strength and surface plasticity of the wire rods produced meet the user's requirements, the inclusions are not rated in the inspection results. It is impossible to explain whether the inclusions meet the requirements, and its rolling is highly targeted, and can only be used to produce cord steel wire rods with a diameter of 5mm
Method used
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Experimental program
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Embodiment 1
[0020] Example 1: A cord steel wire rod with a diameter of 5.5 mm was produced.
[0021] (1) Billet heating process: preheating section temperature 500°C, heating section 1 temperature 850°C, heating section 2 temperature 950°C, soaking section temperature 1050°C; tapping temperature 950°C;
[0022] (2) Rolling process: divided into 30 rolling passes, including 6 passes for rough rolling, 6 passes for intermediate rolling, 6 passes for pre-finishing rolling, 8 passes for finishing rolling, and 4 passes for reducing and sizing rolling; Among them, the pre-finishing exit temperature is 940°C, the finishing mill entry temperature is 910°C, the sizing entry temperature is 920°C, and the spinning temperature is 850°C;
[0023] (3) Water cooling process: water cooling is divided into three stages of water cooling, the first stage of water cooling only turns on the first water cooling tank, the second water tank is closed, the second stage of water cooling turns on the first and seco...
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The invention discloses a rolling process of a tire cord steel wire rod and belongs to the technical field of metal wire rod rolling processes. The process is used for improving the quality of the tire cord steel wire rod. According to the technical scheme, the process comprises steps of steel billet heating, eight passes of finish rolling, four passes of size reducing rolling, three sections of water cooling and air cooling. Heating in sections and soaking are adopted in a heating section so as to allow the steel discharging temperature to steadily satisfy requirements. Through an arrangement of eight finishing mills and four size-reducing rolling mills, the internal quality and the external quality are largely improved on the basis that the steel billet satisfies the product dimension after 30 passes of rolling. By arrangement of three sections of water cooling air bellows and control of the opening number, the internal quality of the product is further improved. The rolling process largely improves the quality of the tire cord steel wire rod. The processing physical properties, occluded foreign substances and tissue of the tire cord steel wire rod meet the national standards, and meet requirements of tire cord steel users. A good material for production of high-quality automobile tires is provided. The process has a good market prospect.
Description
technical field [0001] The invention relates to a rolling process of cord steel wire rod, which belongs to the technical field of metal wire rolling process. Background technique [0002] Cord steel is used as the raw material for tire meridians, and is one of the most difficult products in wire rolling production. With the rapid development of the automobile industry, the demand for cord steel for tires is increasing day by day. Due to the stringent requirements of the cord steel on the physical properties, inclusions, grain size, structure, etc. of the finished product, the cord steel produced by most enterprises cannot be finally drawn into the filaments of 0.15-0.38mm required by the meridian. Chinese Patent No. CN103667655A discloses a production process for cord steel wire rods with a diameter of 5 mm. Although the tensile strength and surface plasticity of the wire rods produced meet the user's requirements, the inclusions are not rated in the inspection results. It...
Claims
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Inventor 郭景瑞张义春侯钢铁王静万永健李金波赵劲松刘红艳
Owner HBIS COMPANY LIMITED HANDAN BRANCH COMPANY