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Preparation method of high-performance flanged shaft

A flange shaft, high-performance technology, applied in the field of preparation of high-performance flange shafts, can solve the problems of unsatisfactory flange shaft performance, flange shaft out-of-round deformation, low pass rate, etc., and achieve simple heat treatment steps and shrink The effect of temperature difference and short production cycle

Active Publication Date: 2015-04-29
綦江县速达矿山机械有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the flange shaft prepared by the traditional process, such as unsatisfactory performance, serious out-of-round deformation, and low pass rate, and to provide a method for preparing a high-performance flange shaft; The chemical composition ratio and preparation process are improved, which increases the uniformity of the structure of the flange shaft, the hardness drop is small, and the wear resistance is better, which effectively improves the out-of-round deformation of the flange shaft and improves the production qualification rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The composition of the flange shaft in this embodiment is preferably: C 2.5%; Si 1.6%; Mn 0.5%; P 0.05%; S 0.03%; Cr 3.8%; Ni 0.11%; B 1.0%; N 0.4%; %; Al 0.14%; Zr 0.08%; Mo 0.19%; Cu 0.12%; V 0.5%; Ti 0.14%; the balance is Fe and unavoidable impurities.

[0039] The preparation steps of the flange shaft of the present embodiment are:

[0040] Step 1: Melting is carried out according to the distribution ratio of chemical elements, and the flange shaft casting slab is cast.

[0041] Step 2. Anneal the flange shaft. The specific annealing process is as follows: heat the flange shaft to 900°C for 3 hours, cool in the furnace to 735°C, hold for 5 hours, then cool to 500°C and air-cool the flange. The shaft is roughed. In this embodiment, the flange shaft is annealed first, and the heating temperature is controlled between 890°C and 910°C, the purpose of which is to improve the machining performance of the flange shaft and increase the efficiency of rough machining the fl...

Embodiment 2

[0053] A high-performance flange shaft in this embodiment is basically the same as in Embodiment 1, except that the mass percentage of chemical elements in the flange shaft in this embodiment is as follows: C 2.2%; Si 0.7%; Mn 0.7%; P 0.04%; S 0.03%; Cr 4.2%; Ni 0.08%; B 1.3%; N 0.24%; Mg 0.11%; Al 0.06%; Zr 0.1%; Mo 0.15%; Cu 0.10%; %; Ti 0.2%; the balance is Fe and unavoidable impurities. The specific annealing process of Step 2 in the preparation process is as follows: heat the flange shaft to 890°C for 2 hours, cool it in the furnace to 720°C, hold it for 4 hours, then cool it to below 500°C and take it out of the furnace for air cooling, and then rough machine the flange shaft ; The first section of step three is heated to 700°C with the furnace, and the second section is heated to 1020°C; the thickness of the nano-ceramic coating in step five is 1.5mm.

Embodiment 3

[0055] A high-performance flange shaft in this embodiment is basically the same as in Embodiment 1, except that the mass percentage of chemical elements in the flange shaft in this embodiment is as follows: C 2.8%; Si 2.3%; Mn 0.3%; P 0.05%; S 0.03%; Cr 3.4%; Ni 0.14%; B 0.7%; N 0.4%; Mg 0.07%; Al 0.2%; Zr 0.05%; Mo 0.14%; Cu 0.20%; %; Ti 0.08%; the balance is Fe and unavoidable impurities. The specific annealing process of Step 2 in the preparation process is as follows: heat the flange shaft to 910°C for 4 hours, cool in the furnace to 760°C, hold for 6 hours, and then cool the furnace to below 500°C and leave the furnace for air cooling, and then rough machine the flange shaft ; The first section of step three is heated to 650°C with the furnace, and the second section is heated to 960°C; the thickness of the nano-ceramic coating in step five is 2mm.

[0056] The preparation method of a high-performance flange shaft described in Examples 1 to 3 achieves the purpose of refi...

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Abstract

The invention discloses a preparation method of a high-performance flanged shaft, belonging to the technical field of preparation of flanged shafts. On the basis of conventionally adding Cr, Mn and Ni, N, Al, Zr and other elements are further increased in order to refine the flanged shaft structure by enhancing the microhardness of the flanged shaft and refining the crystal grain of the flanged shaft. The preparation method comprises the following steps: casting a casting blank according to the chemical element proportioning; carrying out annealing treatment on the flanged shaft; carrying out multistage heating on the flanged shaft by using a vacuum air quenching furnace; charging argon into the vacuum air quenching furnace, and quickly cooling the flanged shaft; putting the flanged shaft in a controlled cooling device, and controlling the rotation of the flanged shaft while applying a nano ceramic coating on the surface of the flanged shaft; and when the surface temperature of the flanged shaft is lower than 150 DEG C, discharging, cooling in air and finishing. The flanged shaft has the advantages of higher structural homogenity, small hardness difference and better wear resistance, effectively improves the problem of out-of-round deformation of the flanged shaft, and enhances the production qualification rate.

Description

technical field [0001] The invention relates to the technical field of preparation of flange shafts, in particular to a preparation method of high-performance flange shafts. Background technique [0002] Flange shafts are suitable for all kinds of industrial equipment, ranging from small office equipment such as printers and fax machines to large rotary motors and automobile gearboxes. The working condition of the flange shaft is very complicated, and it will be subjected to various periodic stress interactions such as bending, torsion, vibration, friction and thermal stress during the working process. Therefore, if one wants to improve the use effect and service life of the flange shaft, it is required that the structure of the flange shaft is more uniform, the hardness difference is small, and the wear resistance is better. However, the flange shaft prepared by the existing technology cannot achieve the desired effect. . [0003] In addition, after quenching, the flange ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D1/18C21D9/28B23P15/00
CPCC21D1/18C21D1/26C21D6/004C21D6/005C21D6/008C21D9/28C22C38/001C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C22C38/16C22C38/18C22C38/32
Inventor 李大志
Owner 綦江县速达矿山机械有限责任公司