Preparation method for alloy steel 1.6582 forged circle for heavy load gear
A technology of alloy steel and forging circle, which is applied in the field of preparation of alloy steel 1.6582 forging circle for heavy-duty gears, can solve the problem that the performance index is difficult to reach the steel for heavy-duty gears at the same time.
Active Publication Date: 2019-02-15
东北大学无锡研究院
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Problems solved by technology
However, using the existing forging and heat treatment methods to produce the forged round material, it is difficult to achieve various performance indicators to meet the requirements of heavy-duty gear steel at the same time, so it must be continued on the existing production process. Improve
Method used
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Experimental program
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Effect test
Embodiment Construction
[0012] One of the examples
[0013] Select 1.6582 alloy steel ingot, weight is 9 tons, the average equivalent diameter of steel ingot section is 845mm, with this steel ingot as raw material, adopt the method disclosed in this invention to carry out forging and heat treatment, produce the forged circle of diameter 400mm, the step of concrete production processing is :
[0014] 1) heating. Heat the steel ingot to 700°C, hold it for 2 hours, then heat it to 800°C, hold it for 2 hours, then heat it to a malleable temperature of 1220°C, then hold it for 5 hours, so that the surface and internal temperature of the steel ingot are basically the same, and the austenite is homogenized , and then start forging;
[0015] 2) forging. Steel ingots are hoisted to the forging press and start forging. First, they are forged into squares, then their edges are pressed, and finally they are rounded. The forging ratio is controlled at 3.68, and the forging temperature is controlled within the ...
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The invention discloses a preparation method for an alloy steel 1.6582 forged circle for a heavy load gear and belongs to the technical field of alloy steel forged circle machining and manufacturing.The preparation method is characterized in that a steel ingot is heated to 1180 DEG C to1220 DEG C in a multi-segment manner and then heat preserving is performed; within the range of 1200 DEG C to 800 DEG C, forging is performed according to the forging ratio of 2:1 to 4:1; then air cooling and sand burying are performed; then placing into oil under the 850 + / - 20 DEG C temperature for quenchingfor 30 min to 60 min, and natural air cooling is performed till room temperature is achieved; and finally, tempering treatment is performed under the 600 DEG C to 660 DEG C temperature. The tensile strength of a product reaches 800 Mpa to 950 Mpa, the yield strength is larger than or equal to 600 Mpa, the elongation rate is larger than or equal to 16%, Z is larger than or equal to 55%, the impacting energy being ISO-V, a 20 DEG C average value is larger than or equal to 45 J, and various technical indexes put forwards for the alloy steel 1.6582 forged circle for the heavy load gear by each industry are totally met.
Description
technical field [0001] The invention belongs to the technical field of processing and manufacturing alloy steel forging circles, and specifically relates to a method for preparing alloy steel 1.6582 forging circles for heavy-duty gears. Background technique [0002] With the rapid development of various related industries in the equipment manufacturing industry, the amount of heavy-duty gear steel used in railway locomotives, high-speed rail passenger cars, heavy trucks and large construction machinery, oil drilling platforms, and port heavy lifting equipment is constantly increasing. At the same time, the comprehensive performance of steel has also put forward higher and higher requirements. However, using the existing forging and heat treatment methods to produce forged round materials, it is difficult to achieve various performance indicators that meet the requirements of heavy-duty gear steel at the same time, so it must be continued on the existing production process. ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C21D8/06C21D1/18C22C38/02C22C38/04C22C38/44C22C38/06C22C38/42C22C38/46B21J5/00
CPCB21J5/00C21D1/18C21D8/065C22C38/02C22C38/04C22C38/06C22C38/42C22C38/44C22C38/46
Inventor 刘相华徐国庆杜光远安赛前
Owner 东北大学无锡研究院