2. 南宫NG28

      Our service

      Centre Testing International Co., Ltd. (CTI) is the pioneer and leader in the TIC Industry which provides one-stop solutions on testing, inspection, certification, calibration, audit, training & technical services.

       
      By Industry

      Our service capabilties cover the upstream and downstream of the supply chain including textile and apparel,toys,electronic appliances,medical health,food...andother industries.
      Specialty

      Comprehensively guarantee quality and safety, promote compliance and innovation, demonstrate brand competitiveness, and achieve higher quality, healthier, safer, and greener sustainable development.
      AUTHORITY & TRUST
      QUALITY & VALUE
      Metallographic Analysis of Metal Materials

      Metallographic analysis is a powerful tool to analyze and study various materials, establish the quantitative relationship between microstructure and various properties of materials, and study the transformation dynamics of materials. CTI can provide high precision and high speed metallographic analysis test items, and provide reliable data for customers to evaluate materials more scientifically and use of materials reasonably.

      Metallographic Analysis of Metal Materials

      ◉    Service Background

      1. Check the quality of raw materials by metallographic analysis;

      2. The microstructure parameters of the accepted products were analyzed by metallography;

      3. Quality control in the production process, select the appropriate production process;

      4. As an important basis for failure analysis.

      ◉    Service Content

      1. Test Items

      Microstructure analysis

      A method of examining metallic tissue by metallographic microscope.

      Etch test for macrostructure and defect of steels

      Etch test for macrostructure and defect of steels

      Determination of the average grain size

      Intercept method: Measure the grain size by counting the number of points at which the measured segment of a given length intersects the grain boundary.

      Evaluation of the nonmetallic  inclusion

      The view observed by the metallographic was compared with the inclusions map, and the inclusions were rated separately.

      Metallographical for the gray cast iron

      Graphite distribution shape, graphite length, carbide distribution shape, carbide quantity, phosphorus eutectic type, phosphorus eutectic distribution shape, phosphorus eutectic quantity

      Metallographical for the ductile iron

      Spheroidization grading, graphite size grading, ferrite and pearlite number grading, phosphorus eutectic number, cementite number

      Case hardening depth

      Metallographic method, hardness method

      Determination of depth of decarburization

      Metallographic method, hardness method

      Phase content of stainless steel

      Comparison of maps

      Eutectic carbide

      The worst field of view was compared with the map

      2. Applicable product scope

      Applicable to metal materials and the products, including:

      Steel materials: carbon steel, stainless steel, heat resistant steel, alloy steel, cast iron, etc.

      Nonferrous metals: aluminum alloy, copper alloy, titanium alloy, etc.

      Other metal products: profiles, plates, pipes, fasteners, castings, parts, mechanical equipment and components, etc.

      3. General Sample Requirements

      Microstructure analysis

      grinding area＜400mm2, H: 15mm~20mm

      Etch test for macrostructure and defect of steels

      1. 250mm*H*20mm

      2. customer request

      Determination of the average grain size

      Metal Type

      Evaluation of the nonmetallic  inclusion

      1. Longitudinal section≥20mm*10mm

      2.Small thickness, diameter or wall thickness, area<200mm2，contact us.

      Metallographical for the gray cast iron

      grinding area＜400mm2，H: 15mm~20mm

      Metallographical for the ductile iron

      grinding area＜400mm2，H: 15mm~20mm

      Case hardening depth

      cross section

      Determination of depth of decarburization

      1. small parts, the whole section, thickness<5mm

      2. larger parts, Cut off part of the cross section, includes the entire decarbonized layer, thickness>5mm

      Phase content of stainless steel

      Axial length: 10mm~15mm

      Eutectic carbide

      Axial length: 10mm~12mm

      ◉    Our Strengths

      a) Experienced technicians to provide detailed technical advice and result analysis;

      b) Advanced high-end and automatic testing equipment, providing a variety of testing solutions;

      c) Complete test and result reporting process to ensure accurate and reliable test results.

       

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