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Centrifugal Casting

The centrifugal casting method is the method to produce pipes by pouring molten metal into a rapidly spinning cylindrical mold in which centrifugal force from the rotation exerts pressure on the molten metal. In 1952, Kubota developed its first centrifugal casting technology for steel. Since establishing a framework for industrial-scale mass production, Kubota has steadily supplied high-performance, high-quality steel castings for industrial equipment.

Core Technologies

Advanced centrifugal casting technology produces high-quality castings

Advantages of Centrifugal Casting

Directional solidification, starting from the outer face in contact with the metal mold, realizes a sound cast metal quality, free of cavity and inclusions. The centrifugal force produces a hollow cylindrical product with no wall thickness variations. Another advantage of the centrifugal casting method is that residual stress after casting is minimized because there is nothing to disturb solidification shrinkage.

Horizontal Centrifugal Casting

Dual Layer Casting

Advantages of Dual-layer Centrifugal Casting Pipes

The outer and inner layers are metallurgically bonded into a completely integrated structure.
A wide choice of outer and inner layer combinations is available through perfectly controlling the molten metal temperature and optimally configuring casting conditions.
Products can be designed to have a variety of features by altering the inner and outer layers.

Ring sample of a dual-layer centrifugal casting pipe

Multi-Layer Casting

Kubota's Centrifugally Cast Composite Rolls

  • Kubota chose a centrifugal casting method for manufacturing rolling-mill rolls in 1961, earlier than any other manufacturer worldwide.
  • In 1991, Kubota began producing the world's first centrifugal cast composite rolls with an outer layer made of a high-speed tool steel material with high resistance to wear and surface-roughening performance. An intermediate layer based on our proprietary technology is provided between the outer layer and the core to improve the boundary strength.

The roll has centrifugally cast outer and intermediate layers and a ductile cast iron core with superior impact absorption.

Examples of centrifugally cast composite roll products

Related Products

Cracking tubes are used in the manufacturing processes for ethylene and propylene, which are the raw materials of petrochemical products.

Heat-resistant cast steel reformer tubes are employed in such processes as oil refining, methanol manufacture, and ammonia synthesis.

We have established an organization to cover all stages from research through manufacturing and inspection of alloy materials for industrial equipment to be used in extreme environments. By using our proprietary casting process technologies, we are able to offer a wide range of products that are highly resistant to heat, corrosion and abrasion for different service environments and to meet different property requirements.

Strong resistance to heat, impact and wear is an essential quality for rolling-mill rolls which are used to roll out high-temperature steel ingots. Our technological expertise, through which we developed the world's first industrial multi-layer rolling-mill roll made by centrifugal casting, can realize rolls with such high added values.

Related Technology

Materials which demonstrate ideal characteristics across a wide range of industrial fields in a variety of environments. Kubota develops and offers materials with the most suitable properties to meet customer needs, based on many years of experience, unique technologies, and solid success records.

Related Industries

We develop long-life materials that possess superior heat resistance, corrosion resistance, and creep characteristics needed to withstand severe environments in industrial furnaces. We also offer high-performance piping products with tailored interior shapes or interior surface modifications using our proprietary technologies to improve the efficiency and performance of industrial furnaces.

Super heat-resistant refractory materials and rolling-mill rolls are our main products for steel industry users. Castings are finished into functional products using our precision machining techniques. We can meet a variety of machining requirements, such as simultaneously machining the inner and outer surfaces of a large-diameter long pipe, or finishing the inner surface of a small-diameter pipe with a pull boring tool.

We process a wide variety of materials, from steel to plastics, using a range of technologies. Kubota's TXAX is a brake pad friction material that has less impact on the environment, favored by many users both within and outside of Japan.

Contact Us

To inquire about a product, service, maintenance, or any other matter, please contact your nearest Kubota location directly by phone or contact us by email. Before making an inquiry, we recommend that you check out our customer support information, including FAQs, as you might be able to find the answer to your question more quickly there.