High-strength alloy steel for door frame and preparing method thereof

An alloy steel, high-strength technology, applied in the field of alloy steel, can solve the problems of surface wear, corrosion, affecting the appearance and use, strength, hardness, toughness and other mechanical and mechanical properties defects.

Inactive Publication Date: 2017-02-15
ANHUI KATA DOOR & WINDOW
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the currently commercially available alloy steel for door frames is prone to wear and corrosion on its surface dur...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) The alloy steel is washed with water, followed by anaerobic calcination at a temperature of 235° C. for 5 hours, and then placed in sodium dodecylbenzenesulfonate with a concentration of 30 g / L for 35 seconds of activation treatment;

[0020] (2) Heat the alloy steel after activation treatment from 22°C to 585°C at a heating rate of 20°C / min, and keep it at 585°C for 60 minutes to perform the first heating heat treatment; then from 585°C at a rate of 10°C / min Raise the temperature to 780°C at a heating rate of min, and keep it at 780°C for 160 minutes to perform the second heating heat treatment;

[0021] (3) Quenching the heat-treated alloy steel with a PAG quenching agent with a volume concentration of 6%, then heating at 500°C for 100min, then water-cooling to 125°C, then naturally cooling to 18°C, and finally placing In a magnesium chloride solution with a volume concentration of 18g / L to obtain high-strength alloy steel A1 for door frames;

[0022] Wherein, in...

Embodiment 2

[0024] (1) The alloy steel is washed with water, followed by anaerobic calcination at a temperature of 245° C. for 6 hours, and then placed in fatty acid glycerides with a concentration of 40 g / L for 50 seconds of activation treatment;

[0025] (2) Raise the temperature of the alloy steel after the activation treatment from 25°C to 620°C at a heating rate of 25°C / min, and keep it at 620°C for 80 minutes to perform the heat treatment of the first heating; then from 620°C to 15°C The heating rate of °C / min is raised to 820 °C, and the heat treatment is carried out at 820 °C for 180 min for the second heating;

[0026] (3) Quenching the heat-treated alloy steel with a PAG quenching agent with a volume concentration of 10%, then heating at 520°C for 120min, then water-cooling to 150°C, then naturally cooling to 25°C, and finally placing In the magnesium chloride solution whose volume concentration is 22g / L to make the high-strength alloy steel A2 for the door frame;

[0027] Wher...

Embodiment 3

[0029] (1) Wash the alloy steel with water, then perform anaerobic calcination at a temperature of 240° C. for 5.5 hours, and then place it in sodium glycocholate with a concentration of 35 g / L for 40 seconds of activation treatment;

[0030] (2) The alloy steel after the activation treatment is heated up to 600°C from 24°C at a heating rate of 22°C / min, and kept at 600°C for 70min to carry out the heat treatment of the first heating; then from 600°C to 13 The heating rate of °C / min is raised to 800 °C, and the temperature is kept at 800 °C for 170 min to perform the heat treatment of the second heating;

[0031] (3) Quenching the heat-treated alloy steel with a PAG quenching agent with a volume concentration of 8%, then heating at 510°C for 110min, then water-cooling to 135°C, then naturally cooling to 22°C, and finally placing In a magnesium chloride solution with a volume concentration of 20g / L to obtain high-strength alloy steel A3 for door frames;

[0032] Wherein, in pa...

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PUM

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Abstract

The invention discloses high-strength alloy steel for a door frame and a preparing method thereof. The method comprises: (1) performing water washing on alloy steel, then performing anaerobic calcinating, and then placing in an active agent for activation processing; (2) performing thermal processing for the first time and thermal processing for the second time on the activated alloy steel in sequence; (3) quenching, heating and cooling the thermally processed alloy steel, and then placing in a magnesium chloride solution to prepare the high-strength steel for a door frame, wherein the alloy steel contains respective elements in parts by weight: 0.65-0.85% of C, 0.15-0.35% of Si, 0.20-0.30% of Mn, 0.3-0.55% of Mo, 0.15-0.4% of Mg, 0.05-0.15% of Ge and the balance of Fe, the active agent is one of sodium dodecyl benzene sulfonate, fatty glyceride and sodium glycocholate, a quenching agent used in step (3) is PAG quenching agent, and in step (3), a heating temperature is 500-520 DEG C, and time is 100-120min. The high-strength alloy steel for a door frame prepared by the method has excellent mechanical properties such as large strength and large hardness.

Description

technical field [0001] The invention relates to alloy steel, in particular to high-strength alloy steel for door frames and a preparation method thereof. Background technique [0002] The door frame is an important part of the building envelope structure system. According to its constituent materials, the common door frames include wooden door frames, glass door frames, aluminum alloy door frames and alloy steel door frames. The wooden door frame is flammable, easy to deform, difficult to repair after being damaged, easy to crack, scar, poor corrosion resistance, susceptible to insects, etc., and prone to mildew when it is damp. Glass door frames are fragile, which limits their applications. The aluminum alloy door frame is easily deformed, and aluminum is a high energy consumption product. Alloy steel door frame has the characteristics of high strength, easy processing, low cost, low operation and management costs, and low price, so it is widely used in door frames. [0...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/12C21D1/18C21D1/60
CPCC22C38/02C21D1/18C21D1/60C22C38/002C22C38/04C22C38/12
Inventor 洪长林
Owner ANHUI KATA DOOR & WINDOW
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