News

Continuous Pre-forming — With the continuous pre-forming method

Continuous Pre-forming — With the continuous pre-forming method, the forging is given a defined pre-shape in a single forming movement. Some of the traditionally used pre-forming units are hydraulic or mechanical presses as well as cross rolls. The continuous process offers the advantage, especia... Read More

How to find the machining difficulty of stainless steel flange

First of all, before selecting the drill bit, let's take a look at what are the difficulties in machining the stainless steel flange?Find the difficult points can be very accurate, very quickly to find the use of the drill.What are the difficulties of stainless steel flange processing?Brief stick... Read More

The main disadvantages of water as quenching and cooling medium for forgings are:

1、in the typical part of the austenitic isothermal transition diagram, i.e., about 500-600℃, the water is in the steam film stage, and the cooling speed is not fast enough, which often leads to the "soft point" formed by uneven cooling and insufficient cooling speed of forging.In the martensitic... Read More

Sealing principle and characteristics of flange

The sealing problem of flat welded flange has always been a hot issue related to the production cost or economic benefit of enterprises, so the sealing principle of flat welded flange has been improved and improved.However, the main design shortcoming of flat welded flange is that it cannot preve... Read More

How many types of forging are there?

According to the forging temperature, it can be divided into hot forging, warm forging and cold forging.According to the forming mechanism, forging can be divided into free forging, die forging, rolling ring and special forging. 1. Open Die forging Refers to the machining method of forging with a... Read More

Zero heat preservation, quenching and normalizing forgings

In the heat treatment of forging, due to the large power of the heating furnace and long insulation time, the energy consumption is huge in the whole process, in a long period of time, how to save energy in the heat treatment of forging has been a difficult problem. The so-called "zero insulation... Read More

Main application directions of large forgings

According to the regulations of China's heavy machinery industry, all free forgings produced by hydraulic forging machine above lOOOt can be called large forgings.According to the forging capacity of the free forging hydraulic press, it is roughly equivalent to: shaft forgings weighing more than ... Read More

Germany TUBE & WIRE 2020 will be postponed to Dec 7th to Dec 11th, 2020.

Shanxi DongHuang Wind Power Flange Manufacturing Co., LTD. will be attending Wire & Tube 2020 – International Wire and Tube Trade Fair. –TUBE & WIRE 2020 to be held in Düsseldorf, Germany from December 7th to December 11th, 2020.   To protect the health and safety of our exhibitors, ... Read More

20th Anniversary International Exhibition for Equipment and Technologies for Oil and Gas Industries

Shanxi DongHuang Wind Power Flange Manufacturing Co., LTD. will be attending Neftegaz Trade Fair 2020 to be held in Ruby Exhibition Centre, Moscow from April 13th to April 16th, 2020. Warmly welcome you to visit us DHDZ at Neftegaz Trade Fair in in Ruby Exhibition Centre. Our booth number is 81... Read More

Shanxi DongHuang Wind Power Flange Manufacturing Co., LTD. will be attending Wire & Tube 2020

Shanxi DongHuang Wind Power Flange Manufacturing Co., LTD. will be attending Wire & Tube 2020 - International Wire and Tube Trade Fair –TUBE & WIRE 2020 to be held in Düsseldorf, Germany from March 30th to April 3rd, 2020 Warmly welcome you to visit us DHDZ at Wire & Tube 2020 Fair in... Read More

Shanxi donghuang takes part in the 2019 ABU dhabi international petroleum exhibition

The ABU dhabi international petroleum fair (ADIPEC), first held in 1984, has grown into the largest and most influential professional exhibition in the Middle East, ranking oil & gas in the Middle East, Africa and the Asian subcontinent. It is also the world's third largest oil exhibition, sh... Read More

Shanxi dongHuang wind power flange manufacturing co., ltd

Shanxi DongHuang Wind Power Flange Manufacturing Co., LTD. will be attending ADIPEC 2019, U.A.E – the world's leading fair for Oil and Gas Sector to be held from 11 – 14 Novermber, 2019. Warmly welcome you to visit us DHDZ at ADIPEC Fair on Nov. 11-14, 2019 in Abu Dhabi. Exhibition Scope Mechan... Read More
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