Low-carbon martensitic steel jaw plate
Low-carbon martensitic steel jaw plate
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  • Low-carbon martensitic steel jaw plate
  • Low-carbon martensitic steel jaw plate

I. Introduction to Low-Carbon Martensitic Steel Jaw Plates

The low-carbon martensitic steel jaw plate is the core wear-resistant component of jaw crushers. By optimizing material composition and heat treatment processes, it achieves a groundbreaking balance among high hardness, exceptional toughness, and excellent weldability, making it a revolutionary material for crushing medium-to-high hardness ores (with compressive strength ≤250 MPa).

Performance Dimension

High-Manganese Steel Jaw Plate (Mn13)

Low-carbon martensitic steel jaw plate

Core Advantages

Initial Hardness

HB180-220 (Unhardened)

HB400-480 (Hardened at Factory)

No need for impact hardening—still reliable under low-load conditions.

Wear-resistant mechanism

Surface Hardening via Impact (HB500+)

Entire cross-section with uniform high hardness

Lifespan increased by 1.5 to 3 times

Impact toughness

≥100 J (Extremely High)

40–80 J (Scientifically Matched Requirements)

Meet the crack resistance requirements while avoiding overdesign.

Weldability

Extremely poor (carbon equivalent > 1.8%)

Excellent (carbon equivalent 0.4–0.6%)

Support on-site surfacing repair

Total Cost

Low unit price, short lifespan

The unit price is high, but the cost per ton of ore has dropped by 30%.

Long-term benefits are significant.

II. Performance Characteristics

The core performance advantage stems from its unique microstructure. The martensitic structure, formed through the quenching of high-temperature austenite, features a highly oriented crystal arrangement that imparts to the material exceptional strength, hardness, and excellent toughness. Compared to conventional high-carbon martensitic steels, low-carbon martensitic steel achieves an optimal balance between strength and ductility by carefully optimizing carbon content and refining the quenching process. At the same time, it boasts superior corrosion resistance, wear resistance, and lightweight characteristics, making it well-suited to meet the demanding requirements for comprehensive material performance across multiple industries.

3. Key Points in the Production Process

1. Smelting and Casting

Purity Control: Electric furnace + LF refining reduces S and P content (S ≤ 0.015%, P ≤ 0.025%).

Chill Optimization: Computer simulations of the solidification process prevent shrinkage porosity (densification is required in stress-concentrated areas of the riser plate).

2. Heat Treatment Process

Quenching cooling rate: Avoid bainitic transformation (which affects toughness); for thick, large cross-sections, accelerate cooling.

Tempering Control: Maintain martensite strength while relieving stress, preventing excessive tempering-induced softening.

IV. Typical Application Areas of Low-Carbon Martensitic Steel

Automotive Industry: Used in the manufacturing of wheels, chassis, body structures, and high-strength bolts, it helps reduce vehicle weight, enhance fuel efficiency, and lower carbon emissions—while also meeting the demands for impact resistance and wear resistance.

Architectural and Bridge Engineering: With high strength and weather resistance, it is ideal for load-bearing structures and bridge construction. Its lightweight properties help reduce the overall self-weight of the structure.

Shipbuilding: Its high strength, toughness, and corrosion resistance ensure that ships can meet the demands for compression resistance, impact resistance, and extended service life.

In the aerospace field: Due to their high strength, lightweight properties, and exceptional resistance to high temperatures and corrosion, they have become a critical material for aerospace structures.

Mold Manufacturing: For instance, ultra-low-carbon cold-extrusion molding plastic mold steels (such as domestically produced 06 steel) can shorten the mold manufacturing cycle, reduce costs, and extend service life.

Keywords

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Low-carbon martensitic steel jaw plate
Low-carbon martensitic steel jaw plate
+
  • Low-carbon martensitic steel jaw plate
  • Low-carbon martensitic steel jaw plate

Low-carbon martensitic steel jaw plate

Our company specializes in the production of wear-resistant castings for crushing and grinding equipment, as well as main bearing shells and thrust blocks for mills of various specifications.

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