Method for sampling from long-axle workpieces by high frequency quenching metallographic examination
A metallographic inspection and high-frequency quenching technology, applied in the field of high-frequency quenching metallographic inspection sampling, quenching metallographic inspection sampling, can solve problems such as troublesome inspection cycle, workpiece damage, waste, etc., to achieve short sampling cycle, reduce waste and The effect of loss, convenience of sampling
Inactive Publication Date: 2010-06-02
张鹏飞
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[0003] In order to overcome the defect that the metallographic inspection sampling after high-frequency quenching of the existing long-axis workpiece damages the workpiece, thereby causing a certain waste of defects, and at the same time, to overcome the defects of the existing sampling method that is troublesome and the inspection period is long, the present invention proposes an indirect sampling method
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[0009] The workpiece sample (2) is tightly installed together through the internal and external threads between the upper aluminum rod (1) and the lower aluminum rod (3). The dimensions of the three after installation are exactly the same as those of the workpiece to be quenched. The material of the workpiece sample (2) is exactly the same as that of the workpiece to be quenched. Under the same process parameters, the combination of the above three is installed on a medium-high frequency machine tool. After quenching according to the specified process and parameters, remove the The workpiece sample (2), its metallographic examination, goes to find the quality problem of batch workpiece.
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The invention discloses a method for sampling from long-axle workpieces by high frequency quenching metallographic examination, belonging to the technical field of electromechanical device manufacture and aiming to overcome the defect of the damage of the high frequency quenching metallographic examination in the traditional long-axle workpieces to the workpieces. In each bath production, a small block of material workpiece with the same material as the workpieces is taken as a sample; the excircle of the material workpiece is processed to the size completely same as that of the excircle of the workpiece; the material workpiece is arranged between two aluminum bars; after clamped with the sample, the overall dimension of the aluminum bars is ensured to be completely same as the size of an actual workpiece; in the intermediate-high quenching, an aluminum material does not generate magnetoelectric effect, thus the aluminum material can be reused; and the material of a workpiece sample clamped between the aluminum bars is same as that of the workpiece and parameters of the workpiece sample during quenching are also same as the parameters of the actual workpiece, thus the problem of batch workpieces can be found by analyzing the workpiece sample.
Description
technical field [0001] The invention relates to a sampling method for metallographic inspection of quenching in long shaft workpieces, in particular to a sampling method for metallographic inspection of high frequency quenching in long shaft workpieces. It belongs to the technical field of electromechanical equipment manufacturing. Background technique [0002] For long shaft workpieces manufactured in large batches, after medium and high frequency quenching, it is often necessary to conduct a sampling inspection of the batches in order to find quality problems or make targeted improvements to the quality. During the metallographic inspection, it is necessary to Destruction of related workpieces is convenient for sampling, so this direct sampling method will inevitably cause a certain amount of waste. At the same time, the inspection cycle is longer and more troublesome. Contents of the invention [0003] In order to overcome the defect that the metallographic inspection ...
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IPC IPC(8): G01N1/04G01N1/28
Inventor 张鹏飞
Owner 张鹏飞
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