2025-10-09
What is steel blackening (bluing)?
Why do some steel parts turn blue (black) on the surface? What is the processing principle and process flow?introductionOxidation treatment of steel, also known as blackening or bluing treatment, is a surface treatment process for steel. The film colo…
2025-09-25
Solidification, risering and pouring of the casting
Introduction: In order to properly consider shrinkage and casting, it is necessary to understand alloy solidification. The solidification mechanisms of different alloys may vary greatly. Therefore, the methods for producing dense and defect free casti…
2025-09-09
how can the deformation of the workpiece occur during mechanical processing be eliminated?
During the cutting process, due to cutting heat, frictional heat between machine parts, internal stress of the workpiece, and clamping force, the workpiece may deform, resulting in waste products.1. Thermal deformation1.1 Thermal deformation of cuttin…
2025-09-02
What do the element symbols and numbers in the alloy steel grade signify?
The element symbols in alloy steel grades directly represent the main alloying elements added to the steel. These symbols are usually represented using chemical element symbols, allowing people to clearly know which alloying elements have been added t…
2025-08-26
How to understand Section shrinkage
Choosing appropriate materials is an essential step in the product development process.Although there are many material performance parameters, the main consideration is still the mechanical properties of the material, such as strength and hardness. E…
2025-08-22
Common hard alloys
Hard alloy is a composite material made by powder metallurgy process using refractory metal carbides (mainly tungsten carbide WC) and metal binders (mainly cobalt Co). It has extremely high hardness, wear resistance, red hardness, and certain impact t…
2025-08-12
Heat treatment of aluminum alloys
The role of heat treatment on aluminum and aluminum alloysHeating aluminum and aluminum alloy materials to a certain temperature and holding for a certain period of time to obtain the expected product structure and properties01 AnnealingThe product is…
2025-07-27
The method of refining crystal grains
1. IntroductionThe performance of metal materials is closely related to their internal structure, and grain size is one of the key characteristics of the structure. Fine grains can give metal materials higher strength, hardness, plasticity, and toughn…
2025-07-22
Why is adhesion considered the most fundamental property of a coating?
When discussing the value of water-based coatings, their two fundamental and core functions are to protect the substrate from environmental damage (such as corrosion, wear, UV radiation, chemicals) and to provide aesthetic decorative effects (color, g…
2025-07-18
lathe VS rolling thread
Size and material certainly determine product performance, but without the support of production technology, even the best product design is difficult to achieve its expected performance. Proper production technology can even achieve unexpected result…
2025-07-15
Are there any differences between the roughness standards Ra and Rz?
It is estimated that when observing the roughness markings on mechanical component drawings, both Ra and Rz marking methods have been seen, with Ra marking being more common. Some students have noticed that there are also many marking methods for Rz i…
2025-07-08
The wire drawing process for metal surface
Sheet metal wire drawing is the process of processing metal surfaces through mechanical friction to obtain surface patterns (also known as sanding), including wire drawing, straight lines, and circular ripples.Wire drawing treatment can give the metal…
2025-06-30
Selection of surface roughness
1.One The influence of surface roughness on the functionality of parts1.1. Effects of component wear resistanceDue to the micro geometric shape errors on the surface of the parts, when two surfaces move relative to each other, contact can only occur a…
2025-06-23
What is Dacromet?
Dakro coating process is a new surface treatment technology, also known as Dakle, Dake rust, zinc chromium film, Dakman, etc. It was invented by Americans in the early 1970s and transferred to M.C.II Company in the United States, DACRAL Company in Fra…
2025-06-15
What exactly is the relationship between DN, SDR, and Sch?
The selection of pipelines is a complex issue that usually involves multiple factors such as pipeline material, diameter, wall thickness, and pressure. Here, we will not delve into them in detail, but only discuss three basic terms related to diameter…
2025-06-07
The bonding method of the coating and the influencing factors of the coating adhesion
1. Formation of adhesion of coatingsThe adhesion between the paint film and the substrate can be determined by mechanical bonding, physical adsorption, hydrogen bonding, chemical bonding, and mutual diffusion.2. The bonding method of the coating2.1. M…
2025-06-07
The refractory materials in the shell-making process of investment casting
The refractory materials used in the shell making process of investment casting are generally divided into two types (excluding ceramic cores): one is the refractory powder used to prepare the slurry, and the other is the sanding material used to incr…
2025-06-04
Gear material heat treatment - Nitriding
Gear nitriding is one of the common methods for gear surface hardening treatment. Gear nitriding is a chemical heat treatment process that allows active nitrogen atoms to penetrate the surface of gears at a certain temperature. Through nitriding, the …
2025-05-30
Logistics Knowledge- European Pallet (referred to as "Euro Pallet")
In the large-scale and multi variety transportation services, in order to improve turnover efficiency and enhance safety during transportation, we need to establish unified norms and standards to improve operational efficiency and facilitate mass prod…
2025-05-27
What tolerance grades can be achieved by kinds of machining process
We deal with machining every day. Do you know what precision tolerance levels can be achieved by turning, milling, planing, grinding, drilling, and boring?Tolerance level refers to the level that determines the accuracy of dimensions. The national sta…