YOGIE OEM Высокоточная бесшовная стальная труба с механической подкладкой 40 35crmo центробежная литая катушка

The quality of steel sleeve is determined by the different application and temperature. Spools, also known as winding spools or occasionally rolling mill sleeves, are thick-walled tubes used for winding thin aluminium strips, aluminium foil or stainless steel thin sheet metal for transportation in the manufacturing process and storage. The wound metal is called a coil.
It mainly used in alumina foil plant and Tin foil plant. our company offers the materials as follow:

(1) The feature of centrifugal casting is that the sleeve has a good metal feeding effect, the casting has a dense structure and good mechanical properties.
The blanks which were produced by centrifugal casting can ensure the material density of the sleeve is close to the forgings, and the internal and external surfaces do not have defects such as pores, blisters, looseness, inclusions, and cracks of the ordinary sand castings.

(2)Use the special tool to process end face, taper and the outer diameter of steel sleeve spool according to inner hole to ensure beating of the taper, the concentricity and cylindricity of the steel spool.

1. Annealing
Annealing is to heat the steel spool to the appropriate temperature and then slowly cool the steel sleeve to achieve or close to the equilibrium state.
2, Normalizing
Normalizing is making steel spool cool after it reaches suitable temperature, the effect of normalizing is similar to annealing, commonly used to improve the cutting performance of material, also sometimes used for low requirements for some parts as the final heat treatment.
3. Quenching
Quenching is the rapid cooling process in the quenching medium of water, oil or other organic salts and organic water, after the heating of work piece. The steel is hardened after quenching, but it is brittle at the same time.
4, Tempering
Tempering is in order to reduce the brittleness of steel. Place the steel which is after quenching in higher than the room temperature and under 650 ℃ for a long time of heat preservation, cooling again , this process is called tempering.

The package would be according to customer requirements, and it is coated with anti-rust oil. It would be rolled by plastic cloth and the grass ropes.
It is delivered by a whole lot, with measures of anti-collision without other goods. Besides, it also can be packaged and shipped according to export standard.