Characteristics and forming process of elbow
The double phase steel elbow is twice the size of the ordinary stainless steel elbow, and the material used in the double phase steel elbow is relatively reduced, reducing the manufacturing cost of the facility. In terms of corrosion resistance, especially under the harsher standards of the material area environment, what are its characteristics and functions, let's take a look at it together
The characteristics and unique features of the double phase steel elbow are more than two times higher than ordinary stainless steel, and have sufficient plastic toughness necessary for pressing, and have excellent stress corrosion cracking resistance
Especially in the chloride environment. Duplex steel has a high corrosion resistance, in some substances, such as glacial acetic acid, benzoic acid and even higher can also replace high-alloy materials austenitic stainless steel elbow, and even corrosion resistant alloy materials
Corrosion properties of two-phase steel elbows
Compared with stainless steel with similar alloy material composition, its wear corrosion resistance and loss corrosion performance are better than austenitic stainless steel duplex steel flange application range, in view of this advantage of duplex steel flange. It is widely used in a variety of wastewater treatment pipelines, paper industry facilities, food industry processing, salt removal facilities, oil field pipelines and facilities, and a variety of acid-base regional environments.
Wear resistance of two-phase steel elbows
The application is four to five years longer than the usual stainless steel elbow, such as in the pipeline in seawater, the application of dual-phase steel flange, in view of the long service life, can also greatly reduce the cost of product replacement. Labor cost. Relatively high cost performance is also similar high. Quality is the guarantee of reputation, reputation is the embodiment of quality.
Double steel elbows are widely used in many industries, especially in chemical pipelines and deep-sea environmental protection and energy-saving equipment, and the ultra-high corrosion resistance makes duplex stainless steel elbows have great advantages.
Duplex stainless steel is a kind of corrosion-resistant material, with excellent wear resistance and ductility, it has very good processing characteristics, and can also be made into a variety of parts.
Forming process of elbow
Elbows account for about 80% of all pipe fittings in the pipe system, which is a large part. The elbow is used to bend the pipe. Different molding processes are used to shape elbows of different materials or wall thickness.
At present, the commonly used seamless elbow molding process is hot push. The hot push elbow forming process uses a special bending press and core. The mold and heating device push the blank into the mold and move it forward under the push rod.
In the process of heating, expansion and bending, the deformation characteristics of the metal material of the hot push elbow depend on the law of constant volume before and after the plastic deformation of the metal material.
A mandrel is used to control the deformation process of the tube billet, so that the compressed metal flow at the inner arc can compensate for the other parts of the diameter expansion, and the diameter of the tube billet is less than the diameter of the elbow
