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500E Australian standard wire and production method thereof

A production method and wire technology, applied in the field of materials, can solve problems such as low strength, reduced vanadium, and different performance stability, and achieve the effects of increasing yield strength, increasing strength, and increasing dislocation resistance

Inactive Publication Date: 2014-12-17
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above patent application mainly uses the precipitation strengthening effect of carbonitrides to produce rods. However, due to the difference in production process and performance stability of wire rods, the direct use of the above technology will still lead to the result that the yield strength exceeds the range of the Australian standard; And reducing the content of vanadium will lead to low strength

Method used

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  • 500E Australian standard wire and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: The 500E Australian standard wire rod is prepared by the following specific process.

[0018] Put the billet into a heating furnace with a temperature of 1100-1180°C in the soaking section and heat it. The holding time in the soaking section is 50 minutes, so that the billet reaches a heating temperature of 1100°C and is released from the furnace; the heated billet is descaled by high-pressure water Afterwards, carry out rough, intermediate and pre-finish rolling. The starting temperature of rough rolling is 1050°C; the rolled piece is cooled to 910°C by passing through water, and then finish rolling is started. Spinning: After spinning, the method of weak cooling at the front end and air cooling at the rear end is adopted. The cooling speed in the weak cooling zone is controlled at 4°C / s, and the coiling temperature is controlled at 540°C for coiling. After coiling, air cooling is used to obtain uniform performance indicators. 500E Australian standard wire, ...

Embodiment 2

[0019] Embodiment 2: This 500E Australian standard wire rod is prepared by the following specific process.

[0020] Put the billet into a heating furnace with a temperature of 1100-1180°C in the soaking section and heat it. The holding time in the soaking section is 55 minutes, so that the billet reaches a heating temperature of 1120°C and is released from the furnace; the heated billet is descaled by high-pressure water Afterwards, carry out rough, intermediate and pre-finish rolling. The starting temperature of rough rolling is 1065°C; the rolled piece is cooled to 915°C by passing through water, and then finish rolling is started. Spinning: After spinning, the method of weak cooling at the front end and air cooling at the rear end is adopted. The cooling speed in the weak cooling zone is controlled at 5°C / s, the coil collection temperature is controlled at 525°C for coil collection, and the coil is air-cooled after collection to obtain uniform performance indicators 500E Au...

Embodiment 3

[0021] Embodiment 3: The 500E Australian standard wire rod is prepared by the following specific process.

[0022] Put the billet into a heating furnace with a temperature of 1100-1180°C in the soaking section and heat it. The holding time in the soaking section is 45 minutes, so that the billet reaches the heating temperature of 1110°C and is released from the furnace; the heated billet is descaled by high-pressure water Afterwards, carry out rough, medium and pre-finish rolling. The starting temperature of rough rolling is 1055°C; the rolled piece is cooled to 930°C by passing water, and then finish rolling is started. The finishing temperature is controlled to be 1010°C; the temperature is cooled to 910°C by passing water Spinning: After spinning, adopt weak cooling at the front end and air cooling at the rear end. The cooling speed in the weak cooling zone is controlled at 4.5°C / s, and the coil collection temperature is controlled at 535°C for coil collection. After the coi...

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Abstract

The invention discloses a 500E Australian standard wire and a production method thereof. The 500E Australian standard wire is produced by performing procedures of heating, rough rolling, finish rolling, spinning and cooling for a steel billet; the steel billet comprises the following components in percentage by mass: 0.18-0.22% of C, 0.20-0.40% of Si, 1.20-1.40% of Mn, P not higher than 0.035%, S not higher than 0.035%, 0.10-0.12% of V, 0.015-0.019% of N, and the balance of Fe and inevitable impurities. The contents of C, Si, and Mn are optimized and adjusted, and the microalloy element V is added, so that the precipitation temperature and the brittle transition temperature of carbonitride can be reduced, the strength, the toughness and the yield strength of the wire are effectively improved, and the 500E Australian standard wire with qualified performance indexes is obtained. The method controls the finish rolling temperature, the spinning temperature, the cooling speed and the coiling temperature of steel rolling to control the precipitation of the carbonitride, the recrystallization of austenite and the deformation state of the austenite to obtain the finally requested structure, so that the strength index and the performance deviation of a rolled product are guaranteed, and the wire product satisfying the Australian standard requirement is obtained.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a 500E Australian standard wire rod and a production method thereof. Background technique [0002] The Australian standard / new standard 4671:2001 has clear upper and lower limits for 500E carbon equivalent and yield strength, and is stricter than the same level of Chinese standard requirements. The carbon equivalent is 0.06% lower than the Chinese standard, and the yield strength range of the Chinese standard is 150MPa. , while the Australian standard is only 100MPa. At present, with the development of vanadium microalloyed steel technology, it has been widely used in the production of steel bars. In recent years, studies have found that increasing the nitrogen content in steel can significantly increase the precipitation temperature of vanadium carbonitrides, which can greatly improve the strength index of the product and be applied in the production of steel bars; for exampl...

Claims

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Application Information

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IPC IPC(8): C22C38/12C21D8/06
Inventor 王全利白瑞国贾元海马海峰宫彦岭张兴利
Owner HEBEI IRON AND STEEL
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