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Detailed description

Macroscopic metallographic examination

Detection standard

  • Detection specification

Where can I go to get a complete solution for macrometallographic testing? BAIJIAN Materials Testing Institution provides macrometallographic testing services. It is a national high-tech enterprise, a third-party materials laboratory, and a CMA qualification certification agency. It is a collectively owned scientific research institution with complete laboratory instruments. , a strong scientific research team, adhering to the concept of scientific research and dedication, engaged in performance testing, non-standard testing, unknown substance detection and identification, industrial problem diagnosis and testing, composition testing, failure testing, corrosion testing, etc. Test reports will be issued in 7-15 working days to support The QR code system checks authenticity, and multiple laboratory branches across the country support nationwide door-to-door sampling/sample delivery testing services.

Detection cycle: 7-15 working days

Testing fee: Initial inspection of samples. After the initial inspection, a quotation will be made based on the customer's testing needs and the complexity of the experiment.

Macroscopic metallographic detection range

Welds, steel bars, fractures, steel materials, low-temperature steels, fillet welds, copper alloys, aluminum alloys, copper-tin brazing, bolts, low alloys Steel, corrosion-resistant alloy welded joints, austenitic stainless steel, boiler water wall tubes, stainless steel heat exchange tubes, bearing carburized steel, valve springs, etc.

Macrometallographic detection method

Macrometallographic detection is a comprehensive inspection and analysis of the appearance and structure of metal materials to evaluate their performance and quality. The following are commonly used macroscopic metallographic detection methods

1. Metallographic microscope: It is one of the most commonly used macroscopic metallographic detection methods. By observing the metal structure and defects under a metallographic microscope, it can be determined Information such as the material’s grain size, grain shape, phase content, and tissue distribution, as well as whether there are defects such as cracks, deformation, and residual stress. At the same time, it can also be used to measure grain size, hardness, etc.

2. Digital image processing and analysis: including image capture, digital image processing, analysis and recognition steps. It can digitize the tissue structure and defect images under the metallographic microscope for further quantitative analysis and processing.

3. X-ray diffraction analysis: By irradiating the material surface, measuring the intensity and angle of the reflected and diffracted light, and by analyzing the characteristics of the reflected and diffracted light, determine the phase content and type of the material, and study Structure of crystals and quantitative analysis of stresses in crystals.

4. Chemical analysis: Determine the element content and chemical composition of metal materials through chemical analysis.

5. Hardness test: Measure the hardness value of metal materials by conducting hardness tests. Common hardness testing methods include Rockwell hardness test, Brinell hardness test, Vickers hardness test, Knoop hardness test, etc.

What does the BAIJIAN test report do? What can it help you solve?Questions?

1. Sales report. (Sales need to provide third-party testing reports to make their products more unique, let the product data speak for themselves, and make customers more confident in the quality of their products.)

2. Research and development reports. (In the process of developing new products, we encountered some thorny issues about ingredients. We used third-party testing data to find the cause of the problem, solve the problem in a timely manner, shorten the R&D cycle, and reduce R&D costs)

3. Improve products quality. (Discover problems with your own products through comparison of third-party testing data, improve product problems, improve quality, and reduce production costs)

4. Use of scientific research paper data.

Macroscopic metallographic testing standards

JB/T 10077-1999 Metallographic microscope

GB/T 30067-2013 Metallographic terminology

JB/T 5108-1991 Cast brass. Metallography

TB/T 2255-1991 Metallography of high phosphorus cast iron

JB/T 3829-1999 Vermicular graphite cast iron. Metallography

GB/T 7216-1987 Gray cast iron metallography

STAS 11961/1-1983 Metallography. Steel Indication and evaluation methods of macrostructure

ASTM E340-15 Standard Practice for Macrocorrosion of Metals and Alloys

What are the advantages of BAIJIAN Materials Testing Laboratory?

1. A collectively owned testing agency with complete qualifications and scientific, fair and accurate test reports.

2. Multiple laboratory branches are located across the country, supporting door-to-door sampling/sending samples for testing.

3. The testing cycle is short, the testing cost is low, and the experimental plan is more complete.

4. For initial inspection of samples, no testing fees will be charged during the initial inspection.

5. The test report supports scanning the QR code to check the authenticity.

BAIJIAN testing process

1. Send samples. (Communicate with engineers, submit your own testing requirements and send samples to our research institute)

2. Initial inspection samples. (After receiving the sample, conduct a preliminary inspection of the sample and formulate a detailed experimental plan)

3. Quotation. (After the initial inspection, a quotation will be made based on the customer's testing needs and the complexity of the experiment)

4. Both parties confirm, sign a confidentiality agreement, and start the experiment.

5. It takes 7-15 working days to complete the experiment.

6. Mail the test report and provide post-service.

The above is the relevant introduction to macroscopic metallographic testing. If you have other needs, you can consult the laboratory engineer to help you solve it.

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