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A kind of production process of steel wire rod containing Ti fiber

A production process and technology for steel wire rods, applied in the field of metallurgy, can solve problems such as difficult control of wire breakage rate, achieve excellent comprehensive mechanical properties, avoid surface damage, and facilitate drawing processing.

Active Publication Date: 2017-12-01
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to meet this requirement, especially after adding Ti, the tensile strength is generally increased to about 400MPa, and the broken wire rate is more difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A production process of Ti-containing fiber steel hot-rolled wire rod, Ti-containing fiber steel SAE1006Ti, furnace number 16701730, a total of 37 wire rods, carbon content C%: 0.05%; manganese content Mn%: 0.29%; silicon content Si%: 0.12 %; titanium content Ti%: 0.08%; phosphorus P%: 0.009%; sulfur content S%: 0.001%; ​​nickel content Ni%: 0.02%; chromium content Cr%: 0.05%; copper content Cu%: 0.05%; Content Al%: 0.005%; molybdenum content Mo%: 0.003%. Boron content B%: 0.0077%; nitrogen content N: 50ppm; boron-nitrogen ratio B / N: 77 / 50=1.54.

[0025] Shot blasting and magnetic particle inspection were carried out on 37 billets, and 26 billets were found to have surface defects marked with chalk, and then a grinding machine was used to spot-grind the local defects; after the fiber steel billets came out of the furnace, a high-pressure water descaling device was used to remove them Surface oxide scale, descaling water pressure between 203-215Kg.

[0026] Wire rod sp...

Embodiment 2

[0030] A production process of Ti-containing fiber steel hot-rolled wire rod, Ti-containing fiber steel SAE1006Ti, furnace number 16701732, a total of 28 wire rods, carbon content C%: 0.033%; manganese content Mn%: 0.33%; silicon content Si%: 0.09 %; titanium content Ti%: 0.09%; phosphorus P%: 0.009%; sulfur content S%: 0.005%; nickel content Ni%: 0.02%; chromium content Cr%: 0.04%; copper content Cu%: 0.05%; Content Al%: 0.004%; molybdenum content Mo%: 0.002%. Boron content B%: 0.0087%; nitrogen content N: 33ppm; boron-nitrogen ratio B / N: 87 / 33=2.64.

[0031] Shot blasting and magnetic particle flaw detection inspections were carried out on 28 billets, and 19 billets were found to have defects on the surface marked with chalk, and then a grinding machine was used to spot-grind the local defects; after the fiber steel billets came out of the furnace, a high-pressure water descaling device was used to remove them Surface oxide scale, descaling water pressure between 205-213Kg....

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Abstract

The invention provides a manufacturing technique of a fiber steel wire rod containing Ti, and is used for improving the drawing performance of an original steel wire rod for users. The requirements of users for the drawing performance are met since chemical composition content is optimized, the surface qualities of an ingot blank and a finished steel wire rod are controlled, and the mechanical performance index and the wire broken rate are controlled within a certain range. The chemical component of the fiber steel wire rod and the cooling rate of the fiber steel wire rod on an air cooling line are optimized, so that tensile strength is between 380-420 MPa, meanwhile, a good elongation rate and a good diminution rate of face are maintained, the elongation rate is equal to or larger than 30%, the diminution rate of face is equal to or larger than 78%, and the good comprehensive mechanical performance of the fiber steel wire rod is maintained. The packaging, hoisting, storage and transport means of a finished fiber steel wire rod are standardized so that the surface damage of the fiber steel wire rod containing Ti can be avoided. Multi-pass drawing machining can be conveniently conducted on the fiber steel wire rod containing Ti by users, the wire broken rate is controlled within 0.5 time / ton.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a hot-rolled wire rod, in particular to a production process for a Ti-containing fiber steel hot-rolled wire rod. Background technique [0002] Fiber steel is mainly used in infrastructure construction such as industrial floors, underground engineering, airport runways, slope protection, prefabricated structures, etc., so as to replace the threaded steel skeleton. It is called the third-generation concrete. Structural security and other advantages. The user's production process is to draw continuously from a wire rod with a diameter of 5.5mm to a fiber steel wire with a diameter of 0.55mm through 25 passes, and the deformation amount reaches 99%. The control of the broken wire rate in the wire drawing process is a very critical indicator, and it is required to be controlled within 0.5 times / ton. It is difficult to meet this requirement, especially after adding Ti, the tensile strength is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/50C22C38/42C22C38/06C22C38/44C22C38/54C21D8/06
CPCC21D8/065C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/50C22C38/54
Inventor 肖训军彭学艺成建兵薛彦珍刘天强
Owner NANJING IRON & STEEL CO LTD