CTIA's TZM Alloy in Seamless Steel Pipe Hot Piercing

TZM alloy (Titanium Zirconium Molybdenum) in seamless steel pipe hot piercing refers to TZM alloy piercing plug, which is a high-temperature metal forming tool component used in piercing machines on hot-rolled seamless steel pipe production lines. During processes such as rotary piercing and Mannesmann piercing, TZM piercing plug is positioned at the center of the heated billet and completes metal piercing through rotary rolling and axial feeding, while withstanding complex operating conditions including high temperature, high pressure, severe friction, and thermal shock.

CTIA’s TZM piercing plug uses molybdenum (Mo) as the matrix, with titanium (Ti: 0.40%–0.55%), zirconium (Zr: 0.06%–0.12%), and carbon (C: 0.01%–0.04%) additions to form TiC and ZrC dispersion-strengthened phases. These strengthening phases effectively improve high-temperature strength, creep resistance, and microstructural stability. Compared with pure molybdenum materials, TZM alloy provides superior high-temperature mechanical properties, meeting the strict requirements for tool life, processing stability, and piercing quality during continuous seamless steel pipe hot piercing.

Features of CTIA’s TZM Alloy Piercing Plug
CTIA manufactures TZM alloy piercing plugs through mature powder metallurgy processes, including raw material purity control, uniform powder mixing, compaction, high-temperature sintering, hot working, and precision machining. By strictly controlling alloy density, grain structure, dimensional accuracy, and surface quality, CTIA ensures stable performance of TZM alloy piercing plugs under high-temperature hot piercing conditions. Key features of CTIA’s TZM alloy piercing plug include:

(1) Excellent High-Temperature Load-Bearing Capability
A melting point of approximately 2620°C enables the piercing plug to withstand compressive loads and periodic mechanical impacts from high-temperature steel billets during seamless steel pipe hot piercing while maintaining structural stability.

(2) Good Wear Resistance
Stable microstructure and high-temperature hardness reduce wear caused by continuous contact and friction between the piercing plug and high-temperature steel billets, extending service life.

(3) Excellent Deformation Resistance
High-temperature strength and creep resistance reduce dimensional changes under long-term high-temperature and high-stress conditions, maintaining stable piercing quality.

(4) Reliable Thermal Cycling Stability
A coefficient of thermal expansion of approximately 5.5–5.9×10⁻⁶/K enables the piercing plug to withstand repeated heating and cooling cycles, reducing the risk of thermal cracking.

(5) Flexible Customized Machining Capability
Customized piercing plugs are available with optimized structures, dimensions, and surface conditions according to piercing machine models, steel pipe specifications, and operating requirements.

Applications of CTIA’s TZM Alloy Piercing Plug in Seamless Steel Pipe Hot Piercing
Seamless steel pipe hot piercing requires piercing plugs to operate continuously under high-temperature, high-pressure, and high-friction conditions. CTIA’s TZM alloy piercing plugs are mainly used in:

(1) Carbon steel seamless pipe production: Used for hot piercing of structural steel and mechanical steel pipes, improving process stability and production reliability.

(2) Alloy steel seamless pipe production: Suitable for alloy steel billets requiring higher piercing temperatures and improved wear resistance.

(3) Stainless steel and high-temperature alloy pipe production: Provides enhanced high-temperature load-bearing capability and wear resistance for difficult-to-process materials.

(4) Large-diameter and thick-wall seamless pipe manufacturing: Maintains structural stability under higher thermal and mechanical loads during large-scale pipe production.

Specifications of CTIA’s TZM Alloy Piercing Plug in Seamless Steel Pipe Hot Piercing
(1) Dimensions: Customized diameters, lengths, taper angles, and head dimensions available.

(2) Structures: Standard, customized, and special structural piercing plugs available.

(3) Machining: Precision turning, grinding, and surface finishing available.

CTIA GROUP (CTIA) has nearly 30 years of experience in molybdenum and molybdenum alloy manufacturing, integrating powder metallurgy production and precision machining capabilities. CTIA controls material composition, densification, microstructure, and machining precision to ensure consistent quality of TZM alloy piercing plugs. Customized solutions are available for different steel grades, piercing machines, and process conditions, with tailored dimensions, taper angles, lengths, and surface finishes to meet high-temperature, high-pressure, and high-friction hot piercing applications. CTIA also supplies TZM plates, blocks, rods, tubes, and other customized TZM components for various high-temperature applications.

For any inquiry, please contact molybdenum and molybdenum alloy manufacturer: CTIA GROUP

Email: sales@chinatungsten.com

Tel: 0086 592 5129696 / 0086 592 5129595

Website: www.molybdenum.com.cn

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