The Difference Between Bimetallic Screw Barrel And Other Screw Barrels

Bimetallic Screw Barrel is made of 88wc/12c0.Crc/25Nicr.XaloY108. The quality of the screw barrel depends on the quenching process. The screw barrel is suitable for glass fiber, plastic, PPA, PPS, PO, ABS, LCP, magnetic powder, bakelite, fireproof, and special engineering plastics.

The screw barrel solves the problem that the chromium plating layer often falls off. The screw and barrel provide a full range of environmental protection for the product.

Where is the bimetal screw barrel used?

Injection molding machine, extruder, bakelite machinery

It has a diameter processing range of ᵩ20 mm to ᵩ250 mm, and an effective length of 8000 mm

The metal composition is 88wc/12c0.Crc/25Nicr.XaloY108 and the nitriding hardness is HRC59o-65o

What are the benefits of the nitriding material injection molding machine screw barrel?

Nitriding provides high hardness and wears resistance to the surface of the screw and barrel. For example, the hardness of the screw and barrel made of 38CrMoAIA can reach above HV950 after nitriding. This is equivalent to HRC= 55o-58o. In addition, its high strength and wear resistance can still be maintained at 350 to 450 degrees Celsius.

This can also improve fatigue resistance by forming higher compressive strength in the nitride layer. Nitrided screw and barrel have higher fatigue limit and lower notch sensitivity under alternating load. Through this process, the fatigue limit can be increased by 30%.

The corrosion resistance of the screw is improved, and nitriding provides a dense layer, which makes the surface of the screw chemically stable. This is a cost-effective and simple nitriding technology. Processes such as galvanizing, bluing and other chemical coatings have been replaced by nitriding. Nitriding reduces the viscosity of the screw and barrel. The nitriding machine can work longer without any major problems.