A φ5.3mm 72A wire rod and its preparation method
A wire rod and temperature control technology, applied in the field of metallurgy and metal materials, can solve the problems of increasing the amount of acid used, increasing the pressure of environmental management, increasing the manufacturing cost of steel wire rope, etc., to save production costs, simplify the production process, and achieve high precision Effect
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Embodiment 1
[0020] 1. Purpose to produce Φ5.3mm wire rod:
[0021] The pass design of the finished product is carried out before smelting and rolling. Considering the thermal expansion coefficient of 1% in the design of the finished pass design and production of Φ5.3mm wire rod, the size of the red billet should be 5.36mm, but currently the second high-line rolling is Φ5.5mm The cold size of the wire rod has reached 5.6mm. Considering various factors, it is finally determined that the coefficient of thermal expansion will not be considered when producing the Φ5.3mm wire rod, and the finished pass design will be carried out according to the size of the red billet of 5.3mm;
[0022] The finished pass is composed of three arcs, the radius of the middle arc is R2=2.65mm, the arc α is 110°, the radius of the transition arc on both sides is 2R=5.3mm, the arc is 35°, and the radius of the transition arc on both sides is R3 =2×R2=2×2.65=5.3mm, radian=(180-α) / 2=(180-110) / 2=35°, refer to the pass d...
Embodiment 2
[0039] 1. Purpose to produce Φ5.3mm wire rod:
[0040] Carry out finished product pass design before smelting and rolling, with embodiment 1;
[0041] The pass of the 30th rolling mill adopts the finished pass of Φ5.3mm wire rod production, and its working roll diameter Dk 30 =155.225mm, finish rolling exit speed V 26 =50.15m / s; use the Φ5.3mm roll ring to control the 30th rolling mill's sky and ground dimensions to 5.3mm, and the dimensions on both sides to 5.25mm, and then observe the diagonal line to control the dimensional tolerance and out-of-roundness of the wire rod;
[0042]2. The Φ5.3mm 72A wire rod produced by the present invention is formed by the proportioning of the following components by weight: 0.75% carbon, 0.35% silicon, 0.60% manganese, and the balance is iron; its preparation method is to cast molten steel After the continuous casting billet of 150mm*150mm is cooled to 25°C, it enters the production of high-speed wire rod rolling mill, heats it to 1050°C,...
Embodiment 3
[0054] Carry out finished product pass design before smelting and rolling, with embodiment 1;
[0055] The pass of the 30th rolling mill adopts the finished pass for producing Φ5.3mm wire rod, and its working roll diameter Dk 30 =155.225mm, finish rolling exit speed V 26 =50.15m / s; use Φ5.3mm roll ring to control the size of the 30th rolling mill's sky and ground to 5.3mm, and the dimensions on both sides to 5.30mm, and then observe the diagonal line to control the dimensional tolerance and out-of-roundness of the wire rod;
[0056] 2. The Φ5.3mm 72A wire rod produced by the present invention is formed by the proportioning of the following components by weight: 0.72% carbon, 0.30% silicon, 0.50% manganese, and the balance is iron; its preparation method is to cast molten steel After the continuous casting billet of 150mm*150mm is cooled to 20°C, it enters the high-speed wire rolling mill for production, heats it to 1080°C, and rolls it into a Φ5.3mm wire rod. After rolling, t...
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