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What are the grade requirements for butt-welded flanges

Butt-welding flange is the pipe diameter and wall thickness of the interface end are the same as the pipe to be welded, and the two pipes are welded as well. Butt-welding flange connection is easy to use, can withstand relatively large pressure. For butt-welded flanges, the materials are not the ... Read More

DHDZ:What are the annealing processes for forgings?

The annealing process of forgings can be divided into complete annealing, incomplete annealing, spheroidizing annealing, diffusion annealing (homogenizing annealing), isothermal annealing, de-stress annealing and recrystallization annealing according to the composition, requirements and purpose o... Read More

The eight major properties of forging

Forgings are generally forged after forging, cutting, heat treatment and other procedures. In order to ensure the manufacturing quality of the die and reduce the production cost, the material should have good malleability, machinability, hardenability, hardenability and grindability; It should al... Read More

How many heating methods do you know about forgings before forging?

Preforging heating is an important link in the whole forging process, which has a direct influence on improving forging productivity, ensuring forging quality and reducing energy consumption. The proper choice of heating temperature can make the billet forming in a better plasticity state. Forgin... Read More

Cooling and heating methods for stainless steel forgings

According to the different cooling speed, there are three cooling methods of stainless steel forgings: cooling in the air, cooling speed is faster; The cooling speed is slow in the sand; Cooling in the furnace, cooling rate is the slowest. 1. Cooling in the air. After forging, stainless steel for... Read More

Knowledge of machining and forging round

Forging round belongs to a kind of forgings, in fact, a simple point is the round steel forging processing. Forging round has obvious difference with other steel industry, and forging round can be divided into three categories, but many people do not know about forging round, so let's understand ... Read More

Knowledge of grain size of forgings

Grain size refers to the grain size within a grain size crystal. The grain size can be expressed by the average area or average diameter of the grain. The grain size is expressed by the grain size grade in industrial production. General grain size is larger, that is, the finer the better. Accordi... Read More

What are the methods of forging cleaning?

Forging cleaning is the process of removing surface defects of forgings by mechanical or chemical methods. In order to improve the surface quality of forgings, improve the cutting conditions of forgings and prevent surface defects from expanding, it is required to clean the surface of billets and... Read More

Defects in forgings when heated

1. Beryllium oxide: beryllium oxide not only loses a lot of steel, but also reduces the surface quality of the forgings and the service life of the forging die. If pressed into the metal, the forgings will be scrapped. Failure to remove beryllium oxide will affect the turning process. 2. Decarbur... Read More

DHDZ: What should be paid attention to when determining the forging process size design?

Forging process size design and process selection are carried out at the same time, therefore, in the design of process size should pay attention to the following points: (1) Follow the law of constant volume, the design process size must conform to the key points of each process; After a certain... Read More

What is forging oxidation? How to prevent oxidation?

When the forgings are heated, the residence time is too long at high temperature, the oxygen in the furnace and the oxygen in the water vapor combine with the iron atoms of the forgings and the phenomenon of oxidation is called oxidation. Fusible formed by iron oxide adhesion on the surface of th... Read More

What are the considerations in the design of custom flan?

Today's flange, is to become our life and many industries, can be used to seal products. Therefore, today's flange application or a very wide range of customized flanges has become a product that can be used in many places. Then the following points should be paid attention to before the customiz... Read More
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