Production method of large-specification medium carbon steel wire rod
A production method and large-scale technology, applied in the field of steel wire rolling, can solve problems such as strength and toughness decline, property loss, and give specific guidance on actual production conditions, and achieve the effect of preventing the surface temperature from rising and reducing the area.
Pending Publication Date: 2021-07-23
XINGTAI IRON & STEEL
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Problems solved by technology
However, the existence of local Widmanstatten structure increases the quality risk and reduces the production efficiency, which leads to a significant decrease in the strength and toughness of the material at this place. In the subsequent service engineering, the alternating tensile and compressive stress and lateral stress will easily lead to the shaft parts. Fracture failure, resulting in property damage and personal injury
[0003] Although there are researches on the formation reasons and control methods of Wei's organization in the existing materials, patents and literature, they are all at the theoretical level, and no specific guidance can be given in combination with the actual production situation
Method used
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Embodiment 1－6、 comparative example 1－3
[0030] Examples 1-6 The billet chemical composition and its mass percentage content are shown in Table 1. The production process includes the billet heating, controlled rolling, and controlled cooling processes, the heating furnace heating temperature of the billet heating process, the total time of the billet in the heating furnace, the furnace The oxygen content is shown in Table 2. See Table 2 for the finishing temperature and spinning temperature of the controlled rolling process. Controlling the cooling process. After rolling and spinning, the coiling method of the wire rod is Garrett large coil. After coiling, the coil is placed on the walking beam to stand still. During the standing process, the fan is turned on under the walking beam to cool the coil, and the coil is covered. Gland, the gland is circular, the diameter is larger than the diameter of the outer ring of the coil, during the cooling process of standing air blowing, the gland will not be blown by the wind, t...
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Abstract
The invention provides a production method of a large-specification medium carbon steel wire rod. The production method comprises the working procedures of steel billet heating, controlled rolling and controlled cooling, in the controlled cooling working procedure, after rolling and spinning, the wire collecting and coiling mode is a large Garret coil, the coil stands on a walking beam after being collected and coiled, a draught fan is started below the walking beam in the standing process to cool the coil, a gland covers the upper portion of the coil, the rolling procedure is controlled, the finish rolling temperature ranges from 850 DEG C to 870 DEG C, and the spinning temperature ranges from 810 DEG C to 830 DEG C. The microscopic structure of the steel wire rod for a large-specification shaft lever produced through the control method is ferrite and pearlite, the widmannstatten structure is less than or equal to grade 1, and the strength range of a coiled rod is controlled within 40MPa.
Description
technical field [0001] The invention belongs to the technical field of iron and steel wire rod rolling, and in particular relates to a production method of large-scale medium-carbon steel wire rods. Background technique [0002] Shaft steel is mainly used in the production of various shaft parts such as piston rods and motor shafts. It is used in industries such as automobiles and machinery, and requires good strength and toughness matching. However, the existence of local Widmanstatten structure increases the quality risk and reduces the production efficiency, which leads to a significant decrease in the strength and toughness of the material at this place. In the subsequent service engineering, the alternating tensile and compressive stress and lateral stress will easily lead to the shaft parts. Fracture failure, resulting in property damage and personal injury. [0003] Although there are researches on the formation reasons and control methods of Wei's organization in th...
Claims
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IPC IPC(8): C21D8/06C22C38/02C22C38/04C22C38/06C22C38/18
CPCC21D8/065C21D2211/005C21D2211/009C22C38/02C22C38/04C22C38/06C22C38/18
Inventor 王冬晨阮士朋董庆郭明仪李亚硕王利军王宁涛张鹏李敏锐郭俊成樊亚鹏闫聪韩光洋张国安秦树超木永卫
Owner XINGTAI IRON & STEEL