Sample preparation method of oxygen content measurement of steels

A technology of oxygen content and steel, applied in the field of sample preparation, which can solve problems such as inability to implement, inability to measure oxygen content, and failure

Inactive Publication Date: 2010-07-07
胡先根
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in actual production, the steel used by bearing manufacturers to make the outer and inner rings of bearings generally uses thin-walled pipe materials, especially for micro-sized deep groove ball bearings, whose wall thickness is only 1.5mm, and it is even more difficult to comply with GB /T11261-2006 standard method for sample preparation, that is, these steels cannot measure the oxygen content
[0007] In addition, some bearings that have been used in th...

Method used

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Examples

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Effect test

Embodiment

[0019] 1. Use a steel pipe material with a diameter of 20mm and a pipe wall thickness of 3mm to make a sample. First clamp the pipe material and then turn it. After removing the oxide skin and decarburization layer on the inner and outer surfaces of the pipe material by 0.5mm each, the pipe material is now The size of the billet is a steel pipe with an outer diameter of Φ19mm and a wall thickness of 2mm, and then the pipe material is cut into a ring with a width of 5mm.

[0020] 2. Expand the 5mm wide ring to make a 5×60mm strip sample, then file the surface flat with a file, and finally use a special diamond-free oxide-free fine file to process except the two ends For the other four planes, the processed surface should be smooth, free of surface defects, and have metallic luster.

[0021] 3. Use a cutting tool to cut into a sample with a weight of 0.5 to 1 gram required by the national standard, and then use carbon tetrachloride or acetone in an ultrasonic cleaner to wash it ...

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Abstract

The invention relates to a sample preparation method of the oxygen content measurement of steels, which comprises sample preparation methods of pipes, sheets and high-hardness steels and can satisfy the requirements on the oxygen content measurement on the steels in a bearing manufacturing enterprise according the technical requirements of products. Especially for thin-wall pipes, thin sheets, high-hardness steels, and other steels, samples can not be manufactured according to rules in a standard, therefore, the oxygen content of steels at key parts of a bearing can not be measured; and the samples can be manufactured by adopting the sample preparation method in the invention, and the oxygen content can also be measured according to procedures, devices, and methods in an GB/T11261-2006 standard. The samples manufactured by using the sample preparation method can not only be used for measuring the steels, but also be used for measuring the oxygen contents of other metals, thereby overcoming limitations of the sample preparation method in the standard, broadening the usable range and ensuring that more steel products can be all subjected to the oxygen content measurement by using the standard method; and the sample preparation method provides reliable basis and guarantees especially for analyzing and searching early failure reasons of bearing products.

Description

technical field [0001] The invention relates to a sample preparation method, in particular to a sample preparation method for measuring the oxygen content of steel materials, and at the same time, the method is also suitable for sample preparation when other metal materials are used for oxygen content measurement. Background technique [0002] With the rapid development of industry, the demand for high-precision and long-life bearings is increasing, especially for generator bearings, chassis bearings and four-point angular contact bearings used in automobiles. Materials put forward higher requirements. The oxygen content of bearing steel is an important indicator to measure the quality of bearing steel, because the distribution of oxygen content of non-metallic inclusions has a great influence on the life of bearing steel. The higher the amount of inclusions, the shorter the life. The inclusion of objects is an important reason affecting the fatigue life of bearing steel. T...

Claims

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Application Information

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IPC IPC(8): G01N1/28
Inventor 吴德威钱仰东
Owner 胡先根
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