Weld Neck Forged Flanges
Threaded Forged Flanges
Lap Joint Forged Flange
Socket Weld Forged Flange
Slip On Forged Flange
Blind Forged Flange
Long Weld Neck Forged Flange
Orifice Forged Flanges
Spectacle Forged Flanges
Loose Forged Flange
Oval Forged Flange (DIN )
Wind Power Flange
CUSTOM Forged Flange
Congratulations on Resumption of Work
by admin on 21-02-24
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...
DHDZ forging 2020 year-end review meeting and 2021 welcome party for freshmen
by admin on 21-02-03
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...
How to find the processing difficulties of stainless steel flange
by admin on 21-01-26
First of all, before choosing the drill bit, take a look at the difficulties in stainless steel flange processing. Find out the difficulty can be very accurate, very fast to find the use of the dri...
What is the process of forging?
by admin on 21-01-25
1. Isothermal forging is to keep the temperature of billet constant during the whole forming process. Isothermal forging is used to take advantage of the high plasticity of certain metals at consta...
The main disadvantages of water as a quenching cooling medium for forgings ？
by admin on 21-01-20
1) in the austenite isothermal transformation diagram of the typical area, that is, about 500-600℃, water in the steam film stage, the cooling rate is not fast enough, often cause uneven cooling an...
What kind of bolt connection does stainless steel flange use?
by admin on 21-01-13
Customers often ask: stainless steel flange connection whether to choose stainless steel bolts? Now I will write what I have learned to share with you: Material has nothing to do with the material...
How to use welding flange correctly
by admin on 20-12-29
Flanges With the rapid development of domestic foreign minister pipeline construction, pipeline pressure test has become an essential important link, before and after the pressure test, must pass t...
Applications of hardenability and hardenability of forgings
by admin on 20-12-24
Hardenability and hardenability are the performance indexes that characterize the quenching ability of forgings, and they are also the important basis for selecting and using materials.Hardenabilit...
The way to improve the plasticity of forging and reduce the deformation resistance
by admin on 20-12-21
In order to facilitate the flow forming of metal billet, reduce the deformation resistance and save equipment energy, the following methods are generally adopted in forging process: 1) Grasp the ma...
by admin on 20-12-17
Flange standard: National standard GB/T9115-2000, Ministry of Machinery STANDARD JB82-94, Ministry of Chemical Industry standard HG20595-97HG20617-97, Ministry of Electric Power standard GD0508 ~ 0...
What are the methods of forging cleaning
by admin on 20-12-16
Forgings cleaning is the process of removing surface defects of forgings by mechanical or chemical means. In order to improve the surface quality of forgings, improve the cutting conditions of forg...
Defects and Countermeasures of large forgings: Uneven microstructure and properties
by admin on 20-12-10
Large forgings, due to their large size, many processes, long cycle, non-uniformity in the process, and many unstable factors, often cause serious non-uniformity in the microstructure, so that they...
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