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Superplastic forming method of 1Cr21Ni5Ti duplex stainless steel complex section ring piece

A 1cr21ni5ti, duplex stainless steel technology, applied in the field of superplastic forming, can solve the problems of superplastic forming that have not been reported yet, and achieve the effect of reducing flow stress and increasing elongation

Active Publication Date: 2014-12-03
GUIZHOU ANDA AVIATION FORGING
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the superplasticity of 1Cr21Ni5Ti duplex stainless steel is limited to the tensile test of the material; and in the field of ring rolling, there has not been any report on the superplastic forming of 0Cr21Ni5Ti duplex stainless steel ring parts with complex cross-sections.

Method used

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  • Superplastic forming method of 1Cr21Ni5Ti duplex stainless steel complex section ring piece
  • Superplastic forming method of 1Cr21Ni5Ti duplex stainless steel complex section ring piece
  • Superplastic forming method of 1Cr21Ni5Ti duplex stainless steel complex section ring piece

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specific Embodiment approach

[0026] To implement the superplastic forming method of the 1Cr21Ni5Ti duplex stainless steel complex cross-section annular part of 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 1Cr21Ni5Ti duplex stainless steel is: C content 0.09% ~ 0.14%, Mn content ≤ 0.80%, Si content ≤ 0.80%, Cr content 20.0% ~ 22.0%, Ni content 4.80% %~5.80%, Ti content 0.60%~0.80%, S content ≤0.025%, P content ≤0.035%, the balance is Fe.

[0028] The superplastic forming process steps of 1Cr21Ni5Ti duplex stainless steel ring with complex cross-section are as follows:

[0029] According to a certain specification, the 1Cr21Ni5Ti duplex stainless steel is blanked into bars; the 1Cr21Ni5Ti duplex stainless steel bars are heated t...

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Abstract

The invention discloses a superplastic forming method of a 1Cr21Ni5Ti duplex stainless steel complex section ring piece. The superplastic forming method comprises the following steps: heating 1Cr21Ni5Ti duplex stainless steel to 1,000-1,200 DEG C, repetitively conducting upsetting and drawing until total forging deformation reaches 55-70 percent, heating to 1,250 DEG C at the heating speed of 2 DEG C per second, and preserving heat for 30 minutes to obtain a fine-grained 1Cr21Ni5Ti duplex stainless steel blank; heating the blank to forging temperature, and conducting upsetting, punching and height flattening to obtain an alloy ring blank; at temperature of 940-980 DEG C, rolling the alloy ring blank at the maximum feeding speed of 2.8mm / s to obtain the 1Cr21Ni5Ti duplex stainless steel complex section ring piece. The method can enable 1Cr21Ni5Ti duplex stainless steel to be in a superplastic state during formation, and thus the 1Cr21Ni5Ti duplex stainless steel complex section ring piece with performance and dimension which satisfy the requirements is obtained. The ring piece is mainly used as a connecting ring, a bearing ring or the like and is widely used on mechanical equipment in the industrial fields such as aviation and space flight.

Description

technical field [0001] The invention relates to a superplastic forming method, in particular to a superplastic forming method for a 1Cr21Ni5Ti duplex stainless steel 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 presen...

Claims

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Application Information

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IPC IPC(8): B23P15/00B21H1/06B21J1/04
CPCB21H1/06B21J1/003B21J1/025B21J1/04B21J1/06B23P15/00
Inventor 欧阳斌葛金锋苏春民李玉凤杨孝荣李兴品蒋睿华
Owner GUIZHOU ANDA AVIATION FORGING
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