News
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What is the difference between hot forging and cold forging?
Hot forging is the forging of metal above the temperature of recrystallization. Increasing the temperature can improve the plasticity of the metal, is conducive to improving the internal quality of...Read more -
What are the characteristics of special steel?
Compared with ordinary steel, special steel has higher strength and toughness, physical properties, chemical properties, biocompatibility and process performance. But special steel has some differe...Read more -
What is the effect of thick rubbing on forging process?
Friction in forging is the friction between two metals of different composition and properties (alloys), between soft metal (workpiece) and hard metal (die). In the case of no lubrication, is the c...Read more -
Detailed classification of commonly used flanges in China
1. According to the standard of mechanical industry, flange types are: plate type flat-welded flange, butt-welded flange, integral flange, butt-welded ring-plate type loose sleeve flange, flat-weld...Read more -
What kind of shaft forgings meet the requirements?
Axial forging is a kind of wide application of forgings, such as axial plus has good processability, m any porosity in practice, there is no other flaws, thus not only has good appearance, with fin...Read more -
The sealing method of hydraulic cylinder forging
The reason why the hydraulic cylinder forgings need to be sealed is because of the existence of internal leakage and external leakage. When there is internal leakage and external leakage in the hyd...Read more -
What forging technology does the flange factory have?
Flange factory is a production enterprise producing flanges. Flanges are parts connected between pipes, which are used for the connection between pipe ends. It is also useful for the flange on the ...Read more -
How to forge stainless steel forgings?
The precision of rough or stainless steel forgings is higher. The application of advanced technology and equipment can achieve little or no cutting. The metal materials used in forging should have ...Read more -
The sealing principle and characteristics of flange
Sealing of flat-welded flanges has always been a hot issue related to the production cost or economic benefit of enterprises. However, the main design disadvantage of flat-welded flanges is that th...Read more -
What should be noted in the examination of die forgings before heat treatment?
The inspection before solution heat treatment is a pre-inspection procedure to check the finished product's surface quality and dimensions according to the technical conditions, die forging drawing...Read more -
Congratulations on Resumption of Work
Congratulations on Resumption of Work Dear new and old customers and friends, Happy New Year. After a happy Spring Festival holiday, Lihuang Group (DHDZ)started normal work on February 18th. All th...Read more -
DHDZ forging 2020 year-end review meeting and 2021 welcome party for freshmen
2020 is an extraordinary year, the outbreak of the epidemic, the whole country is difficult, big state organs and some enterprises, small to every employee and ordinary people, all bear a huge test...Read more
