Preparation technology of non-tempered steel long rod-like axial forgings

A technology of non-quenched and tempered steel and preparation process, applied in mechanical equipment, temperature control, metal rolling, etc., can solve the problems of limited range of torsional performance improvement, mismatch between torsional performance and strength of non-quenched and tempered steel, and achieve fatigue Excellent performance, good torsional performance, excellent performance effect

Active Publication Date: 2019-09-06
丹阳市鑫泰合金科技有限公司
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AI Technical Summary

Problems solved by technology

However, the application of non-quenched and tempered steel in long rod-shaped shaft parts still has its limitations, especially the torsional performance and strength of non-quenched and tempered steel do not match. and other methods to improve the strength of non-quenched and tempered steel, however, the improvement of its torsional performance is limited

Method used

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  • Preparation technology of non-tempered steel long rod-like axial forgings

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Embodiment Construction

[0010] A non-quenched and tempered steel long rod-shaped shaft part, the chemical composition of which is calculated by weight percentage includes: C0.30~0.50, Mn 1.20~1.60, Si 0.68~0.90, Cr 0.10~0.30, Ni≤0.25, V 0.05~ 0.15, Nb 0.01~0.05, Ti 0.01~0.05, Cu 0.21~0.35, Al 0.05~0.10, N 0.008~0.02, S≤0.02, P≤0.01, and the rest are Fe and unavoidable impurities.

[0011] According to the production process of the present invention, the components of each embodiment are as shown in Table 1.

[0012] The chemical composition (wt%) of the embodiment of table 1

[0013]

[0014] The above-mentioned non-quenched and tempered steel long rod-shaped shaft forgings preparation process, the preparation process is: batching → electric furnace smelting → LF refining → VD vacuum treatment → continuous casting and rolling → blanking → radial forging → controlled cooling → bar , the specific operation process is as follows.

[0015] In the electric furnace smelting process: strictly control t...

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Abstract

The invention relates to a preparation technology of non-tempered steel long rod-like axial forgings. The preparation technology adopts the procedures of burdening, electric furnace smelting, LF refining, VD vacuum treatment, continuous casting and rolling, cogging, radial forging, controlled cooling and obtaining of rods; technological parameters of all the procedures are strictly controlled; thelong rod-like axial forgings with the diameters of 5 to 30 cm are prepared; and the forgings have the following features: the grain size is 8 to 9 grades, tensile strength is 1000 to 1100 MPa, yieldstrength is 810 to 850 MPa, the elongation percentage is greater than or equal to 18 percents, the percentage reduction of area is greater than or equal to 45 percents, and impact toughness (longitudinal) is greater than or equal to 50 J. The forgings have good torsional resistance and fatigue resistance.

Description

technical field [0001] The invention relates to a non-quenched and tempered steel and its preparation process, in particular to a non-quenched and tempered steel material for long rod shaft parts and its forging process preparation process. Background technique [0002] Green and sustainable development requires parts processing and manufacturing to comply with low energy consumption, low pollution, and low cost in terms of material selection and processing methods. Non-quenched and tempered steel is a kind of steel that can achieve the strength level of quenched and tempered steel without quenching and tempering heat treatment process, thereby shortening the manufacturing process of parts and saving energy at the same time. It has been widely used in automobiles, construction machinery, petrochemical and other fields application. However, the application of non-quenched and tempered steel in long rod-shaped shaft parts still has its limitations, especially the torsional pe...

Claims

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Application Information

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IPC IPC(8): B21B1/46B21B37/74B21J5/00B21K1/06C21C7/00C21C7/06C21C7/10C22C33/04C22C38/00C22C38/02C22C38/04C22C38/06C22C38/42C22C38/46C22C38/48C22C38/50
CPCB21B1/46B21B37/74B21J5/002B21K1/06C21C7/0006C21C7/0056C21C7/06C21C7/10C22C33/04C22C38/001C22C38/02C22C38/04C22C38/06C22C38/42C22C38/46C22C38/48C22C38/50
Inventor 毛向阳
Owner 丹阳市鑫泰合金科技有限公司
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