Industry News
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Inspection of appearance quality of forgings
Appearance quality inspection is generally a non-destructive inspection, usually with the naked eye or low magnifying glass inspection, if necessary, also use non-destructive inspection method. The inspection methods of internal quality of heavy forgings can be summarized as: macroscopic organiza...Read more -
What should we pay attention to in terms of safety during forging processing?
During the forging process, in terms of safety, we should pay attention to: 1. forging production is carried out in the state of metal burning (for example, 1250~750℃ range of low carbon steel forging temperature), because of a lot of manual labor, accidentally burning may occur. 2. The heating f...Read more -
Forging: How to forge good forgings?
Now the fittings in the industry mostly use forging way, DHDZ provides high-quality forgings, so now when forging, what raw materials are used? The forging materials are mainly carbon steel and alloy steel, followed by aluminum, magnesium, copper, titanium and their alloys. The original state of ...Read more -
What should we pay attention to in terms of safety during forging processing?
During the forging process, in terms of safety, we should pay attention to: 1. forging production is carried out in the state of metal burning (for example, 1250~750℃ range of low carbon steel forging temperature), because of a lot of manual labor, accidentally burning may occur. 2. The heating f...Read more -
Is there a requirement for hardness of shaft forgings?
Surface hardness and uniformity of shaft forgings are the main items of technical requirements and routine inspection. The hardness of the body shows the wear resistance, etc., in production, the resilience shore D hardness value HSd is used to express. The hardness requirements of shaft forgings...Read more -
What are the quality checks for forgings?
In order to ensure the quality of forgings to meet the requirements of design and use of the indicators, it is necessary to forgings (blank, semi-finished products and finished products) quality inspection. The content of forgings quality inspection includes: chemical composition inspection, appe...Read more -
Details to note when using threaded flanges
Threaded flange refers to a flange connected by thread and pipe. During design, it can be handled according to loose flange. The advantage is that no welding is required, and the additional torque produced by the flange deformation on the cylinder or pipe is very small. The disadvantage is that t...Read more -
Why do you choose 304 butt welded stainless steel flanges
Let's start with a fact: Austenitic stainless steel pipes are commonly used in a variety of corrosive environments. However, if you are careful, you will find that in the design documents of some units, as long as DN≤40, all kinds of materials are basically adopted. In the design documents of oth...Read more -
How to identify the quality of forging
The main task of forgings quality inspection and quality analysis is to identify the quality of forgings, analyze the causes of forgings defects and preventive measures, analysis and research It is an important way to improve and guarantee the quality of forgings to investigate the causes of defe...Read more -
Three methods of carbon steel flange sealing
There are three types of carbon steel flange sealing surface, which are: 1, tenon sealing surface: suitable for flammable, explosive, toxic media and high pressure occasions. 2, plane sealing surface: suitable for pressure is not high, non-toxic medium occasions. 3, concave and convex sealing sur...Read more -
Do you know the four fires of heat treatment in forging technology?
Forgings in the forging process, heat treatment is the most important link, heat treatment roughly annealing, normalizing, quenching and tempering four basic processes, commonly known as metal heat treatment of the "four fire". one, metal heat treatment of the fire - annealing: 1, annealing is t...Read more -
Factors affecting oxidation of forgings
The oxidation of forgings is mainly affected by the chemical composition of the heated metal and the internal and external factors of the heating ring (such as furnace gas composition, heating temperature, etc.). 1) Chemical composition of metal materials The amount of oxide scale formed is close...Read more
