On Site Metallographic Examination

Black metals: steel, cast iron (gray cast iron/ductile iron/vermicular cast iron), alloy structural steel, stainless steel, tool steel, bearing steel, etc

Nonferrous metals: aluminum and aluminum alloys, copper and copper alloys, magnesium and magnesium alloys, titanium and titanium alloys, zinc alloys, etc

Special materials: hard alloys, high-temperature alloys, precision alloys, precious metals, powder metallurgy materials, etc

Welding joints: weld seam, heat affected zone, fusion line microstructure and defect detection

Heat treated parts: microstructure and hardening layer testing of quenched, tempered, normalized, annealed, carburized, nitrided, and carbonitrided parts

Surface treatment layer: thickness and microstructure testing of plating, coating, spray coating, and oxide layer

Failure Analysis: Metallographic Analysis of Failure Causes such as Fracture, Corrosion, and Wear of Metal Components

Low magnification organization and defects: looseness, segregation, shrinkage, bubbles, cracks, inclusions, folds, white spots, etc
Sulfur print test: detecting the distribution and segregation of sulfur in steel
Tower Test: Evaluating Surface Defects and Internal Quality of Steel
Macroscopic analysis of fracture surface: microstructure observation: morphology and distribution of ferrite, austenite, pearlite, martensite, bainite and other microstructures
Grain size rating: average grain size, grain size distribution, grain boundary characteristic detection
Evaluation of non-metallic inclusions: Class A (sulfides), Class B (alumina), Class C (silicates), Class D (spherical oxides) ratings
Second phase analysis: identification of precipitated phases, morphology analysis, and content determination
Determination of hardened layer depth: measurement of thickness of carburized layer, nitrided layer, carbonitrided layer, and quenched hardened layer
Depth measurement of decarburization layer: measurement of thickness of fully decarburized layer and partially decarburized layer
Microscopic defect detection: microcracks, pores, porosity, intergranular corrosion, etc
Organizational uniformity assessment: evaluating the consistency and segregation degree of material organization
Welding microstructure analysis: detection of weld microstructure, heat affected zone microstructure, and fusion line characteristics
Graphite morphology analysis: grading the type, size, and distribution of graphite in cast iron to determine the fracture type and origin