焊接钢

Welding steel refers to steel products that are created or enhanced through welding processes. 一个 堆焊覆盖板 is a typical example of welding steel because it is manufactured by welding a wear-resistant alloy layer onto a steel base plate. Unlike ordinary rolled steel plates, its final performance is achieved through weld metallurgy, not only through steelmaking.

What Is a Hardfacing Overlay Plate

A hardfacing plate is a composite welding steel plate made of:

The hardfacing layer is not glued or bonded mechanically — it is metallurgically welded 到底板, 形成一个 single, integrated steel structure.

Why Hardfacing Plates Are Welding Steel

1. They Are Made by Welding, Not Rolling

Traditional steel plates are produced by casting and rolling.
Hardfacing plates are produced by depositing molten alloy steel onto another steel plate using welding arcs.

This makes the plate a weld-built steel product, not a single-grade steel.

2. The Wear Layer Is Created by Weld Metallurgy

焊接时, alloy wire or flux melts and forms a molten weld pool on the base plate.
When it solidifies, hard carbide structures form inside the overlay layer.

这是一个 welding-controlled microstructure, which means:

• 硬度

• 耐磨性

• Crack pattern

• 粘接强度

are all determined by the 焊接工艺, not just the raw material.

3. The Bond Is Metallurgical, Not Mechanical

In hardfacing plates, the overlay is:

• Fused into the base steel

• 表格 atomic-level bonding

• Cannot be peeled or separated

This is the key characteristic of welding steel — the product exists only because of weld fusion.

4. Performance Comes from Welding Technology

The wear resistance of a hardfacing plate comes from:

• Welding current

• Travel speed

• Heat input

• Alloy chemistry

• Cooling rate

这些都是 welding parameters, not steel rolling parameters.
That is why hardfacing plates are classified as engineered welding steel.

Difference Between Welding Steel and Normal Steel Plate