Titanium-contained composite alloy reinforcing core-spun yarn and application to HRB400E thread steel

Abstract

The invention discloses a titanium-contained composite alloy reinforcing core-spun yarn and application to HRB400E thread steel. The titanium-contained composite alloy reinforcing core-spun yarn is prepared by coating core powder on an aluminum strip; the core powder comprises the following components in percentage by mass: 30-35% of Ti, 22-28% of N, 15-20% of Si, 3-8% of Cu, 8-12% of Mn, 1-3% ofFe, and 5-8% of Zr; and the sum of the components is 100%. The titanium-contained composite alloy reinforcing core-spun yarn is applied to the HRB400E thread steel; in the smelting process of molten steel, after the preparation of white slag is finished from a molten steel tank to an LF station, the titanium-contained composite alloy reinforcing core-spun yarn is fed in the molten steel tank; theyarn feeding speed is 5-6 m/min; the feeding quantity is 3 m/t steel; after yarn feeding, a soft blowing mode is switched to; the bottom blowing argon flow is 150-180 L/min; and the soft blowing timeis 3-5 min. The titanium-contained composite alloy reinforcing core-spun yarn achieves a reinforcing effect of stabilizing titanium in the HRB400E thread steel, replaces a reinforcing effect of part of vanadium, greatly reduces the production cost of the thread steel, and achieves the popularization and application prospect in production of other vanadium-contained steel types.

Description

technical field [0001] The invention relates to the technical field of iron and steel materials, in particular to a titanium-containing composite alloy reinforced cored wire and its application in HRB400E threaded steel. Background technique [0002] Rebar is a common name for hot-rolled ribbed steel bars. It is a necessary steel for medium-sized and above-sized building components. It mainly includes three categories of second, third, and fourth grades. more than 200 million tons. [0003] At the beginning of 2018, the new standard GB / T 1499.2-2018 for rebar was released to replace GB / T 1499.2-2007, and it will be enforced on November 1, 2018. The new standard cancels the 335MPa grade steel bar and adds 600MPa grade steel bar; adds the grade with E; appropriately tightens the quality deviation, and clarifies that the quality deviation is not allowed to be retested; adds the provisions of the fatigue test method of the steel bar, it is worth noting that the increase Provis...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a titanium-containing composite alloy reinforced cored wire and its HRB400E in view of the current increase in the quality requirements of the new national standard for rebar, resulting in a substantial increase in the production cost of rebar and difficulties in cost control for production enterprises. Application in rebar

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