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Deformed steel bar titanium microalloying production process

A technology of microalloying and production technology, applied in the field of steel materials, can solve problems such as fluctuations in mechanical properties of steel materials, achieve the effects of reducing crack defects and reducing overall costs

Inactive Publication Date: 2021-01-15
SHANDONG SHIHENG SPECIAL STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical properties of titanium are active, and it is easy to combine with impurity elements such as O, N, and S in the steel, and the precipitated TiC is more sensitive to the temperature and cooling rate of the slab in all directions, and it is easy to cause different heats or different parts of the same heat. Fluctuations in mechanical properties of steel

Method used

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  • Deformed steel bar titanium microalloying production process
  • Deformed steel bar titanium microalloying production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A HRB400E grade rebar steel production process, the rebar is made of steel weight percentage: C: 0.21%, Si: 0.65%, Mn: 1.40%, Ti: 0.004%, P: 0.045%, S : 0.045%, the rest is Fe and unavoidable impurities.

[0015] This production process includes the following steps: converter smelting, out-of-furnace treatment, continuous casting, slab heating and rolling. The converter smelting step includes adding silicon-manganese alloy for deoxidation alloying treatment. The out-of-furnace treatment steps include argon blowing station, argon blowing, Optional LF furnace refining, adding ferro-titanium for titanium micro-alloying treatment.

[0016] Converter smelting steps include: raw materials are smelted in a 60-ton converter, the temperature range of the end point is 1630°C, the C content of the end point is 0.06%, and the P content is ≤0.03%; after 1 / 3 of the steel is tapped, silicon-manganese alloy and aluminum-calcium-carbon are added to the ladle Composite deoxidizer etc. a...

Embodiment 2

[0021] A titanium micro-alloying production process for threaded steel, the threaded steel contains the following components by weight percentage: C: 0.25%, Si: 0.80%, Mn: 1.60%, Ti: 0.030%, P: 0.04%, S: 0.04 %, the rest is Fe and unavoidable impurities.

[0022] A titanium micro-alloying production process for threaded steel, comprising the following steps: converter smelting, treatment outside the furnace, continuous casting, slab heating and rolling; the step of converter smelting includes adding silicon-manganese alloy etc. for deoxidation alloying treatment; The processing steps include argon blowing at the argon blowing station, optional LF furnace refining, adding ferro-titanium for titanium micro-alloying treatment.

[0023] Converter smelting steps include: raw materials are smelted in a 60-ton converter, the temperature range of the end point is 1660°C, the C content of the end point is 0.08%, and the P content is ≤0.03%; after 1 / 3 of the steel is tapped, silicon-man...

Embodiment 3

[0028] A titanium microalloying production process for threaded steel, the threaded steel contains the following components in weight percentage: C: 0.23%, Si: 0.7%, Mn: 1.50%, Ti: 0.010%, P: 0.03%, S: 0.035 %, the rest is Fe and unavoidable impurities.

[0029] A titanium micro-alloying production process for threaded steel, comprising the following steps: converter smelting, treatment outside the furnace, continuous casting, slab heating and rolling; the step of converter smelting includes adding silicon-manganese alloy etc. for deoxidation alloying treatment; The processing steps include argon blowing at the argon blowing station, optional LF furnace refining, adding ferro-titanium for titanium micro-alloying treatment.

[0030] Converter smelting steps include: raw materials are smelted in a 60-ton converter, the temperature range at the end point is 1640°C, the C content at the end point is 0.07%, and the P content is ≤0.03%; after 1 / 3 of the steel is tapped, silicon-mang...

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Abstract

The invention relates to a production process of steel for HRB400E-grade deformed steel bars. The produced steel for the deformed steel bars is prepared from the following components in percentage byweight: 0.21%-0.25% of C, 0.65%-0.80% of Si, 1.40%-1.60% of Mn, 0.004%-0.030% of Ti, less than 0.045% of P, less than 0.045% of S and the balance Fe and inevitable impurities. The deformed steel bar titanium microalloying production process comprises the steps of converter smelting, external treatment, continuous casting, casting blank heating and rolling. Silicon-manganese alloy and the like areadded in the converter smelting step for deoxidation alloying treatment, and the external treatment step comprises argon blowing in an argon blowing station, unnecessary ladle furnace (LF) refining and ferrotitanium adding for titanium microalloying treatment. According to the method, the comprehensive production cost is low, the water gap blockage occurrence rate and the continuous casting billetcrack defect in the continuous casting process are obviously reduced, and low-cost stable sustainable production of the HRB400-grade deformed steel bars is achieved.

Description

technical field [0001] The invention relates to the technical field of iron and steel materials, in particular to a titanium microalloying production process for threaded steel. Background technique [0002] With the implementation of the new national standard for rebar, various steel companies have eliminated strong water penetration and controlled rolling and controlled cooling processes, and returned to the path of increasing strength through alloys. The cost of alloying has risen significantly, which has brought greater costs to the cost and process stability control of enterprises. big challenge. At present, my country's rebar is generally alloyed with vanadium or niobium to improve the strength of the finished product and ensure that the target mechanical properties are achieved. Some enterprises also realize composite alloy strengthening by adding vanadium, niobium and titanium elements. In my country, vanadium resources are relatively scarce, and the price is high ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/60C22C33/06C21C7/06B22D11/116
CPCB22D11/116C21C7/0006C21C7/0025C21C7/0068C21C7/0075C21C7/06C21C2007/0093C22C33/06C22C38/02C22C38/04C22C38/14C22C38/60
Inventor 曾四宝陈焕建程洪波楚士进李腾腾付胜群郑果张利武赵滨
Owner SHANDONG SHIHENG SPECIAL STEEL GROUP
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