Forge piece mechanical property inspection grouping and sample taking method

A kind of sample and mechanics technology, which is applied in the field of forging mechanical property inspection group batch and sample collection

Pending Publication Date: 2021-11-16
东方电气风电股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this results in the inspection sample not representing the true performance level of pitch bearing ring forgings

Method used

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  • Forge piece mechanical property inspection grouping and sample taking method
  • Forge piece mechanical property inspection grouping and sample taking method
  • Forge piece mechanical property inspection grouping and sample taking method

Examples

Experimental program
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Embodiment 1

[0029] Example 1: See Figure 3 to Figure 6 , a method for testing the mechanical properties of forgings and taking samples according to the present embodiment is characterized in that it includes the test piece, the material of the test piece and the product piece, the melting furnace number, the forging ratio, and the cross-sectional shape and size are all the same, including the following Steps: S1: Normalize the test piece and the product piece with the same process to obtain the test rough; S2: Carry out conformal rough machining on the test rough, and segmentally saw the test rough along the circumferential direction to obtain Multiple segmented test pieces, one segmented test piece for each quenching and tempering furnace; S3: Take a segmented test piece and product piece for quenching and tempering treatment in the same furnace to obtain a control test piece; S4: In the control test piece Take the sample from above for testing, if the test result is qualified, or the r...

Embodiment 2

[0030] Embodiment 2: the subsection test piece of the present embodiment is provided with spare section, two get sample inspection sections, two get sample inspection sections are arranged at intervals, and left and right each leave surplus head position. In step S2 of the present embodiment, segmental sawing along the chord length of the circumference of 600 mm, the length of the two test pieces for testing is 140 mm, the length of the remaining head is 100 mm, and the left and right sides of the remaining head are left. There is a 5mm incision. The cross-sectional size of the sample in the sample inspection section of this embodiment is 44*44mm, half of the material is used for impact, tensile and gas composition inspection, and the remaining material is used for retesting. In this embodiment, a first impact sample and a second impact sample with the same structure are arranged on the sample inspection section, and the size of the first impact sample is 56*11*11mm. In this ...

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Abstract

The invention discloses a forge piece mechanical property inspection grouping and sample taking method which comprises the following steps: S1, normalizing a test piece and a product piece by the same process to obtain a test rough blank; S2, performing shape follow-up rough machining on the test rough blank, and performing segmented saw cutting on the test rough blank in the circumferential direction to obtain a plurality of segmented test pieces, one segmented test piece being arranged in each quenching and tempering furnace; S3, subjecting one segmented test piece and the product piece to thermal refining in the same furnace, and obtaining a control test piece; S4, taking a sample from the control test piece to be detected, and if the detection result is qualified or the retest result is qualified, judging that the tempering furnace product piece is qualified; and if the product pieces are not qualified, carrying out tempering or tempering heat treatment on the standby section of the control test piece and the original product pieces in the tempering furnace again, then taking a test material from the standby section of the control test piece for detection, if the detection result is qualified, judging the product pieces in the heat treatment furnace to be qualified, and otherwise, judging the product pieces in the heat treatment furnace to be unqualified.

Description

technical field [0001] The invention relates to the technical field of wind power, in particular to a method for testing the mechanical properties of forgings and taking samples. Background technique [0002] Large-scale wind turbine pitch bearing ring forgings require material sampling and testing during the processing process; currently, according to GB / T 29717, the sampling positions are as follows: figure 1 , the standard also stipulates that each heat treatment furnace should have a heightening piece for sampling. The main reasons why this sampling method is difficult to implement are: sampling at this location has a high risk of unqualified impact toughness, so the forging plant is unwilling to implement it; The hardened layer (dense structure layer) is processed away, which will damage the ferrule forging body. It is considered unscientific and unreasonable, so the forging factory is unwilling to implement it; If it is unqualified, heat treatment cannot be carried o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N1/04G01N3/02G01N3/62
CPCG01N1/286G01N1/04G01N3/02G01N3/62
Inventor 曾志肖高强马德生李华清毛忠兴胡占圈李源王文超张超前
Owner 东方电气风电股份有限公司
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