Super-plasticity forming method for GH4169 alloy ring part with complex section

A technology of GH4169 and ring parts, which is applied in the field of superplastic forming of GH4169 alloy complex cross-section ring parts, can solve the problems of superplastic forming that have not been reported yet, and achieve the effects of reducing flow stress, increasing elongation, and good mechanical properties

Active Publication Date: 2014-11-19
GUIZHOU ANDA AVIATION FORGING
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Problems solved by technology

At present, the research on the superplasticity of GH4169 alloy is limited to the tensile test of the material; and in the fiel

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  • Super-plasticity forming method for GH4169 alloy ring part with complex section
  • Super-plasticity forming method for GH4169 alloy ring part with complex section
  • Super-plasticity forming method for GH4169 alloy ring part with complex section

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specific Embodiment approach

[0026] To implement the superplastic forming method of the GH4169 alloy ring with complex cross-section described in the present invention, it is necessary to provide equipment such as a high-temperature heating furnace, a press, a manipulator, and a ring rolling mill. The diameter of the main roll of the ring rolling mill is Φ860mm. The specific implementation is as follows:

[0027] The main chemical element content (weight percentage) of GH4169 alloy is: C content≤0.08%, Cr content 17.0%~21.0%, Ni content 50.0%~55.0%, Co content≤1.0%, Mo content 2.80%~ 3.30%, Al content 0.30% ~ 0.70%, Ti content 0.75% ~ 1.15%, Nb content 4.75% ~ 5.50%, B content ≤ 0.006%, Mg content ≤ 0.01%, Mn content ≤ 0.35% , Si content ≤0.35%, P content ≤0.015%, S content ≤0.015%, Cu content ≤0.30%, Ca content ≤0.01%, Pb content ≤0.0005%, Se content ≤0.0003%, The balance is Fe.

[0028] The superplastic forming process steps of GH4169 alloy ring parts with complex cross-sections are as follows:

[00...

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Abstract

The invention discloses a super-plasticity forming method for a GH4169 alloy ring part with a complex section. The method comprises the steps that GH4169 alloy is heated to the temperature of 1000+/-10 DEG C, after forge deformation with deflection of 40%-50%, the temperature is kept at 890 DEG C for 10 hours, then raised to 950 DEG C and kept for 3 hours, and a crystal GH4169 alloy blank is obtained; the GH4169 alloy blank is heated to forge temperature, and an alloy ring blank is obtained through upsetting, punching and levelling; the alloy ring blank is rapidly rolled and formed at the maximum feed speed of 1.7 mm/s at the temperature of 1060-1080 DEG C, and the GH4169 alloy ring part with the complex section is obtained. According to the method, the GH4169 alloy can be in a super-plasticity state in the forming process, so that the GH4169 alloy ring part with the complex section and both the performance and the size meeting requirements is obtained. The ring part is mainly taken as a connection ring, a bearing ring and the like to be widely applied to mechanized equipment in the industry areas such as aviation and aerospace.

Description

technical field [0001] The invention relates to a superplastic forming method, in particular to a superplastic forming method of a GH4169 alloy complex section ring piece. Background technique [0002] Ring parts with complex cross-sections are widely used as connections, slewing support rings, bearing rings, etc. in large-scale mechanical equipment in aviation, aerospace, construction machinery, wind power, petrochemical and other industrial fields. This kind of ring has harsh service conditions, high requirements on its performance, and the structure of the ring is complex. It is difficult to meet the performance and size requirements of the ring at the same time by using the traditional forming method. [0003] Superplastic forming technology has been widely used in aviation, aerospace and other fields due to its advantages of low deformation resistance, high material plasticity, and the ability to precisely form complex parts at one time. At present, the research on the...

Claims

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Application Information

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IPC IPC(8): B21J5/00B21H1/06
Inventor 魏志坚邱伟杨国平成陆祥雷静越李明吴超
Owner GUIZHOU ANDA AVIATION FORGING
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