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Inspection of Surface Defects and Internal Quality of Metal Welds
Metal weld inspection refers to the process of evaluating the quality of welded joints by adopting various testing technologies. Weld quality inspection is a key link to ensure the safety and reliability of engineering structures. Below, the core content of weld quality inspection is systematical...Read more -
Standard Procedure for Weld Penetration Inspection of Copper Sheets–Precision Control of Weld Quality
This inspection is carried out on the copper sheet welding samples entrusted by the customer. Weld penetration is a core indicator for judging the weld strength, crack resistance and connection reliability of welded copper sheets. Accurate measurement of weld penetration can avoid the risks of co...Read more -
Vickers Hardness Testing for HEA
As we all know, adding more types of metals to an alloy tends to embrittle the material. However, high-entropy alloys (HEAs) are different from conventional alloys: they contain multiple metals yet do not exhibit embrittlement, making them a new class of materials. In industrial production, ensur...Read more -
Operation of Model ZXQ-2S Self-produced Automatic Metallographic Mounting Press
Laizhou Laihua Test Instrument Factory is a manufacturing enterprise integrating R&D, production and sales.Our main products include: hardnesstesters and metallographic sample preparation & analysis equipment. Our company has obtained the lSO9001 enterprise management system certification...Read more -
Hardness Testing of Stainless Steel Sheets
Hardness testing of stainless steel sheets is crucial. It is directly related to whether the material can meet the strength, wear resistance, and corrosion resistance required by the design, ensures the stability of the processing technology and the consistency of product batches, and helps enter...Read more -
Hardness Testing of Engine Cylinder Blocks And Cylinder Heads
As core components, engine cylinder blocks and cylinder heads must withstand high temperatures and pressures, ensure reliable sealing, and offer good assembly compatibility. Their technical indicators, including hardness testing and dimensional accuracy testing, all require strict control using p...Read more -
Metallographic Structure Analysis and Hardness Testing Methods for Ductile Iron
The standard for metallographic inspection of ductile iron is the fundamental basis for ductile iron production, product quality inspection, and quality control. Metallographic analysis and hardness testing can be conducted in accordance with the international standard ISO 945-4:2019 Metallograph...Read more -
The Role and Classification of Hardness Blocks in Hardness Tester Testing
In the process of hardness testing, standard hardness blocks are indispensable. So, what is the role of hardness blocks, and how are they classified? I.Hardness blocks mainly play three roles in hardness testing: calibrating hardness testers, enabling data comparison, and training operators. 1.Du...Read more -
Selection of Cutting Blades for Metallographic Cutters
When using a precision metallographic cutter to cut workpieces, it is necessary to select cutting blades that match the material properties of the workpiece based on its different materials, so as to achieve efficient cutting results. Below, we will discuss the selection of cutting blades from th...Read more -
Rockwell Hardness Testing of PEEK Polymer Composites
PEEK (polyetheretherketone) is a high-performance composite material made by combining PEEK resin with reinforcing materials such as carbon fiber, glass fiber, and ceramics. PEEK materials with higher hardness have better resistance to scratching and abrasion, making them suitable for manufacturi...Read more -
Type Selection Analysis of Hardness Testing Equipment for Large and Heavy Workpieces
As is well-known, each hardness testing method—whether using Brinell, Rockwell, Vickers, or portable Leeb hardness testers—has its own limitations and none is universally applicable. For large, heavy workpieces with irregular geometric dimensions like those shown in the example diagrams below, p...Read more -
Methods and Standards for Hardness Testing of Copper and Copper Alloys
The core mechanical properties of copper and copper alloys are directly reflected by the level of their hardness values, and the mechanical properties of a material determine its strength, wear resistance, and deformation resistance.There are usually the following test methods for detecting the h...Read more
