A kind of chromium-containing low-carbon barbed wire steel and its production method
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A production method and technology for barbed wire, applied in the direction of manufacturing converters, etc., can solve the problems of few production methods of steel wire rods for wire meshes, and no steel wire rods for low carbon wire rods containing chromium, etc., to ensure that the mechanical properties are qualified, The effect of preventing slag and ensuring smoothness
Active Publication Date: 2016-09-28
ZENITH STEEL GROUP CORP +1
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[0006] At present, there are many technical solutions related to the application of barbed wire in the domestic Chinese patent database, but there is no content involving chromium-containing low-carbon steel wire rod for barbed wire, and there are even few production methods for steel wire rod for barbed wire
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Embodiment 1
[0024] Embodiment 1 (stove number 714120621)
[0025] (1) Steel scrap, pig iron and molten iron raw materials are added to the converter. Among them, molten iron into the furnace: Si: 0.48%, P: 0.112%, S: 0.024%, temperature T = 1310 ° C, scrap steel accounts for 11% of the total raw materials; pig iron accounts for 3.5% of the total amount of raw materials; the total charge is 136t / furnace;
[0026] (2) During the converter smelting process, add 10.5t of slag material / furnace, and implement low-gun blowing operation, the final slag basicity is 3.6; the tapping end point [C]=0.05%, the end point [P]=0.014%, The tapping temperature is 1645°C, and 1 / 4 of the tapping time is followed by adding calcium carbide 120kg / furnace, aluminum cake 100kg / furnace, ferrosilicon 0.8kg / t, silicon-manganese alloy 3.9kg / t, and low-carbon ferrochrome 5.2kg in sequence. / t, lime 700kg / furnace and fluorite 120kg / furnace, the tapping time is 4 minutes, the slag blocking operation is adopted in the t...
Embodiment 2
[0032] Embodiment 2 (stove number 714120622)
[0033] The superheat degree of the continuous casting furnace is 25°C, the casting speed is 1.85m / min, the furnace temperature in the soaking section of rolling is 1084°C, the rolling start temperature is 981°C, and the spinning temperature is 933°C, and the other operations are the same as in Example 1.
Embodiment 3
[0034] Embodiment 3 (stove number 714120623)
[0035] The total charging capacity of the converter is 135t / furnace, the end point of tapping [C]=0.06%, and the other operations are the same as in Example 2.
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Abstract
The invention discloses chromium-contained low-carbon steel for wire netting and a production method of the steel. The steel comprises chemical components in percentage by weight as follows: 0.05%-0.10% of C, 0.07%-0.15% of Si, 0.30%-0.50% of Mn, 0.30%-0.40% of Cr, smaller than or equal to 0.035% of P, smaller than or equal to 0.035% of S and the balance of Fe and inevitable impurities. A converter melting process is operated with a low catch carbon method, the content of C in steel tapping is smaller than or equal to 0.06%, and the content of P in steel tapping is smaller than or equal to 0.016%; a crystallizer copper tube with taper of 1.8 is selected for continuous casting, and an intercooling water distribution mode is adopted for secondary cooling; a high spinning temperature and a slow cooling process are adopted for rolling, and a fan is closed and covered with a heat preservation cover. The produced chromium-contained low-carbon steel for the wire netting can guarantee qualified chemical ingredients and mechanical property, and breakage caused by casting blank defect inheritance, inclusions, structure abnormity and the like during drawing, twisting and welding of a wire rod can be avoided.
Description
technical field [0001] The invention relates to a steel production method, in particular to a chromium-containing low-carbon barbed wire steel and a production process thereof. Background technique [0002] Wire mesh steel is widely used in fences, decorations, protection and other facilities in industry, agriculture, construction, municipal, highways, railways, airports, residential quarters, ports, docks, breeding, animal husbandry and other industries. Good impact resistance, good weldability, good elongation, good cold bending resistance and other characteristics. [0003] At present, in foreign markets, boron-containing low-carbon steel hot-rolled wire rods of Φ5.5-12 mm are mainly used to produce barbed wire after pickling, phosphating, multi-drawing, and surface treatment. Hot-rolled wire rods are easy to cause surface cracks, and with the adjustment of raw material performance requirements by foreign wire mesh customers, there is an urgent need for chromium-containi...
Claims
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