Plasma Hardfaced Piercing Plug for Steel Mills

In seamless pipe production, the piercing plug is one of the most critical consumable tools. It directly contacts high-temperature billets under extreme pressure and friction, making it highly vulnerable to abrasive wear, thermal fatigue, and corrosion. Frequent replacement not only increases operating costs but also disrupts production continuity.

To solve this challenge, FNS Pipeline Technology Co., Ltd. offers plasma hardfaced piercing plugs, engineered with reinforced plasma hardfacing technology to significantly extend service life and improve operational stability in steel mills.

Wear resistant piercing plug manufactured by FNS Pipeline Technology

Why Plasma Hardfacing Is Essential for Piercing Plugs

During piercing operations, standard piercing plugs often suffer from:

• Rapid surface wear under high-temperature friction
• Oxidation and corrosion in harsh rolling environments
• Loss of dimensional accuracy, affecting pipe quality

Traditional surface treatments such as spraying or plating cannot provide sufficient bonding strength or long-term durability. Plasma hardfacing, by contrast, creates a metallurgically bonded wear-resistant layer that withstands extreme working conditions.

Plasma Hardfaced Piercing Plug by FNS

FNS plasma hardfaced piercing plugs are manufactured using high-energy plasma transferred arc (PTA) technology, depositing premium alloy powders onto the plug surface to form a dense, crack-free protective layer—without compromising the core toughness of the base material.

Key Performance Advantages

• Exceptional Wear Resistance
  High-hardness alloy layers effectively resist abrasive and adhesive wear during piercing.
• Strong Metallurgical Bonding
  The hardfacing layer is fully fused with the substrate, eliminating risks of peeling or delamination.
• Enhanced Corrosion Resistance
  Suitable for high-temperature and oxidizing steel mill environments.
• Extended Service Life
  Service life is significantly longer compared to untreated or conventionally coated piercing plugs.
• Lower Maintenance Costs
  Fewer replacements and reduced downtime improve overall production efficiency.

Typical Application Process

1. Surface Preparation
   Piercing plug surfaces are cleaned and machined to remove oxidation and contaminants.
2. Alloy Powder Selection
   Wear-resistant alloy powders are selected based on operating temperature, load, and billet material.
3. Plasma Hardfacing Deposition
   Controlled plasma arc melts the powder and bonds it to the plug surface with precise parameter control.
4. Quality Inspection
   Each plug undergoes dimensional inspection, hardness testing, and surface quality checks.

Technical Data – Plasma Hardfaced Piercing Plug

Applications

• Seamless pipe piercing mills
• Carbon steel and alloy steel pipe production
• Heavy-duty rolling and forming lines
• High-temperature, high-load steel mill operations

Why Choose FNS Pipeline Technology Co., Ltd.

With extensive experience in plasma hardfacing and surface engineering, FNS provides customized piercing plug solutions tailored to specific mill conditions. From alloy design to process optimization, we help steel manufacturers reduce costs while improving productivity and product consistency.

SEO-Friendly FAQ (FAQ Schema Ready)

Q1: What is a plasma hardfaced piercing plug?
A plasma hardfaced piercing plug is a steel mill tool enhanced with a wear-resistant alloy layer deposited by plasma transferred arc hardfacing, improving durability and service life.

Q2: How much longer does a plasma hardfaced piercing plug last?
Compared with untreated plugs, plasma hardfaced piercing plugs typically last 2–4 times longer, depending on operating conditions.

Q3: Does plasma hardfacing affect the toughness of the piercing plug?
No. Plasma hardfacing enhances surface hardness while maintaining the core toughness of the base material.

Q4: Can piercing plug hardfacing be customized?
Yes. FNS offers customization of alloy composition, coating thickness, hardness level, and plug dimensions.

Q5: Is plasma hardfacing suitable for high-temperature steel piercing?
Absolutely. Plasma hardfaced coatings are designed to withstand high temperatures, heavy loads, and severe abrasion in steel mills.