Metallographic Analysis-NG28

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Metallographic Analysis

Metallographic analysis is a powerful tool for analyzing and studying various materials, establishing the quantitative relationship between microstructure and properties of materials, and studying the transformation dynamics of materials. NG28 can provide high precision and high speed metallographic analysis test items for customers to evaluate materials more scientifically and provide reliable data for rational use of materials.

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? 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. 250mmH20mm 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