Deformed steel bar quenching technique

A threaded steel and process technology, applied in the field of threaded steel quenching process, can solve problems such as easy corrosion, achieve good anti-corrosion performance, simple quenching process, and easy to use

Inactive Publication Date: 2014-01-01
WUXI YANGGONG MACHINERY MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of easy corrosion of threaded steel after quenching and improve the performance of scale, the invention provides a quenching process for threaded steel, which can improve the performance of scale and improve the corrosion resistance of threaded steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The step of threaded steel quenching process of the present invention is as follows:

[0016] After heating the rebar to 850°C, keep it warm for 40 minutes, and then immerse it in the quenching agent for quenching. The quenching time is 3s.

[0017] Among them, the quenching agent is composed of the following components:

[0018] Potassium dihydrogen phosphate 5kg, sodium nitrate 1.5kg, sodium carbonate 12kg, industrial sodium chloride 7kg, distilled water 74.5kg.

[0019] The preparation method of the quenching agent is as follows: first, potassium dihydrogen phosphate and sodium carbonate are added into distilled water, and after being stirred evenly, sodium nitrate and industrial sodium chloride are added, and the mixture is evenly stirred.

Embodiment 2

[0021] The step of threaded steel quenching process of the present invention is as follows:

[0022] After heating the rebar to 800°C, keep it warm for 30 minutes, and then immerse it in the quenching agent for quenching. The quenching time is 4s.

[0023] Among them, the quenching agent is composed of the following components:

[0024] Potassium dihydrogen phosphate 4kg, sodium nitrate 1kg, sodium carbonate 10kg, industrial sodium chloride 8kg, distilled water 77kg.

[0025] The preparation method of the quenching agent is as follows: first, potassium dihydrogen phosphate and sodium carbonate are added into distilled water, and after being stirred evenly, sodium nitrate and industrial sodium chloride are added, and the mixture is evenly stirred.

Embodiment 3

[0027] The step of threaded steel quenching process of the present invention is as follows:

[0028] After heating the rebar to 950°C, keep it warm for 50 minutes, and then immerse it in the quenching agent for quenching. The quenching time is 2s.

[0029] Among them, the quenching agent is composed of the following components:

[0030] Potassium dihydrogen phosphate 6kg, sodium nitrate 2kg, sodium carbonate 15kg, industrial sodium chloride 6kg, distilled water 71kg.

[0031] The preparation method of the quenching agent is as follows: first, potassium dihydrogen phosphate and sodium carbonate are added into distilled water, and after being stirred evenly, sodium nitrate and industrial sodium chloride are added, and the mixture is evenly stirred.

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PUM

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Abstract

The invention provides a deformed steel bar quenching technique which is characterized in that after a deformed steel bar is heated to 800-950 DEG C, the temperature is kept for 30-50 minutes, then the deformed steel bar is immersed into a quenching agent for quenching, and the quenching time lasts for 2-4 s; the quenching agent comprises the following components in percent by mass: 4-6 percent of potassium dihydrogen phosphate, 1-2 percent of sodium nitrate, 10-15 percent of sodium carbonate, 6-8 percent of industrial sodium chloride and distilled water as the rest. By using the deformed steel bar quenching technique for quenching, the deformed steel bar obtained is excellent in rust protection performance, and the quenching technique provided by the invention is simple and convenient to use.

Description

technical field [0001] The invention relates to a threaded steel quenching process. Background technique [0002] Rebar is a small section steel, generally widely used in civil engineering construction such as houses, bridges, roads, etc., mainly as the skeleton of reinforced concrete building components. The purpose of the rebar is to bear the tension in the concrete member. The thread surface with different concave and convex will be better combined with the concrete, which can prevent the structure from being separated due to insufficient friction between the steel bar and the concrete, resulting in structural damage. [0003] The rebar is usually delivered naked and bundled, and it should be protected from moisture when storing. Corrosion will have a negative impact on the performance of the rebar. Corrosion not only causes waste of steel and affects the appearance of rebar, but also reduces the strength of steel and the bonding force with concrete, causing safety hazar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/60
Inventor 杨龙兴
Owner WUXI YANGGONG MACHINERY MFG
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