A method for preparing high-carbon alloy steel with ultra-high strength
A high-carbon alloy steel, ultra-high-strength technology, applied in the field of solid-state thermal processing of metal materials, can solve the problems of high energy consumption, complex process, shallow processing layer, etc.
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[0020] The invention provides a method for preparing high-carbon alloy steel with ultra-high strength, comprising the following steps:
[0021] Quenching and tempering the high-carbon alloy steel plate to obtain a high-carbon alloy steel plate in a quenched and tempered state;
[0022] The quenched and tempered high-carbon alloy steel plate is sequentially subjected to friction stir processing and tempering to obtain a high-carbon alloy steel with ultra-high strength;
[0023] The high-carbon alloy steel plate, by mass percentage, includes the following components:
[0024] C 0.6-0.9%, Cr 3-12%, Mn 0.4-8%, Si 0.4-0.8%, Ni 0.1-0.5%, Mo 0.4-1.5%, V 0.1-1%, and the balance iron.
[0025] In the present invention, unless otherwise specified, all raw material components are commercially available products well known to those skilled in the art.
[0026] In the invention, the high-carbon alloy steel plate is quenched and tempered to obtain the high-carbon alloy steel plate in a qu...
Embodiment 1
[0035] Heating the Cr3 steel plate to 900°C for 2 hours, then water quenching to room temperature, and then heating to 550°C for 1 hour, then furnace cooling to obtain a quenched and tempered high-carbon alloy steel plate with a uniform tempered sorbite structure;
[0036] Under the argon atmosphere, the quenched and tempered high-carbon alloy steel plate is subjected to friction stir processing (rotation speed is 800r / min, processing speed is 30mm / min, downforce is 0.1mm and inclination angle is 2.5°), after friction stir processing After tempering treatment (300°C, 20 hours) in the zone, it is air-cooled to obtain a high-carbon alloy steel with ultra-high strength.
[0037] figure 2 is the microstructure diagram of the ultra-high-strength high-carbon alloy steel; the left diagram is a metallographic observation organization diagram, and the right diagram is a scanning electron microscope observation organization diagram. Depend on figure 2 It can be seen that after frict...
Embodiment 2
[0039] Heat the Cr5 steel plate to 950°C for 2 hours, then water quench it to room temperature, then heat it to 650°C for 1 hour, then cool it in the furnace to obtain a quenched and tempered high-carbon alloy steel plate with a uniform tempered sorbite structure;
[0040] Under the argon atmosphere, the quenched and tempered high-carbon alloy steel plate was subjected to friction stir processing (the rotation speed was 1000r / min, the processing speed was 30mm / min, the pressing amount was 0.1mm and the inclination angle was 2.5°), and then the friction stir processing Tempering treatment (450°C, 2 hours) in the tempering zone, then air-cooled to obtain high-carbon alloy steel with ultra-high strength;
[0041] Figure 4 It is the transmission electron microscope microstructure diagram of the ultra-high-strength high-carbon alloy steel, composed of Figure 4 It can be seen that after friction stir processing and tempering treatment, martensite decomposes, and the ultra-high stre...
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Abstract
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