Arc Welded Overlay Plate

Arc Welded Overlay Plate Manufacturing: From Bare Steel Plate to Finished Wear-Resistant Product

The performance of a wear-resistant overlay plate depends on more than the alloy composition. A stable manufacturing process is essential to achieve strong bonding, 均匀的硬度, controlled dilution, 使用寿命长.

Arc welded overlay plate manufacturing transforms a standard steel backing plate into a high-performance wear protection product through surface preparation, controlled welding, heat management, finishing, and quality inspection.

This complete process guide explains how chromium carbide overlay plates are produced, the critical control points at each stage, and how manufacturers prevent common welding defects.

1. Complete Manufacturing Process Overview

A typical arc welded overlay plate production line includes the following stages:

Manufacturing Stage	Main Purpose
基板准备	Remove contamination and create suitable welding conditions
预热	Control thermal stress and reduce cracking risk
Welding wire or strip selection	Determine alloy chemistry and wear performance
Automatic arc welding	Create the wear-resistant overlay layer
Slow cooling	Reduce residual stress and prevent crack propagation
Leveling and cutting	Achieve required flatness and dimensions
Final inspection	Verify hardness, bonding, 和表面质量

2. Base Steel Plate Preparation

The first step determines the quality of the final bonding interface. 焊接前, the steel substrate must be properly cleaned and prepared.

2.1 Surface Cleaning and Blasting

Shot blasting or sand blasting removes:

• Rust and oxide layers
• Oil contamination
• Surface impurities
• Loose scale

A clean surface improves arc stability and ensures stronger metallurgical bonding between the overlay and base steel.

2.2 Preheating Process

Depending on substrate thickness and alloy composition, preheating is commonly controlled within approximately 150-250℃.

Benefits of preheating include:

• Lower cooling speed
• Reduced thermal shock
• Improved weld penetration stability
• Lower risk of hydrogen-induced cracking

3. Welding Material Selection

The welding consumable determines the chemical composition and wear performance of the overlay layer.

材料类型	主要特点
Chromium carbide wire	High abrasion resistance and stable hardness
Flux-cored wire	Flexible alloy adjustment and efficient deposition
Wear-resistant strip electrode	High deposition efficiency for large-area plates

The selected alloy system affects:

• Carbide volume fraction
• Hardness level
• 抗冲击性
• High-temperature wear performance

4. Automatic Arc Welding Process

Modern overlay plates are mainly produced using automated welding equipment to achieve consistent quality over large surfaces.

4.1 Single Wire Welding

Single wire systems are suitable for general wear plate production where controlled deposition speed and flexibility are required.

4.2 Multi-Wire Welding

Multi-wire welding increases productivity by improving deposition efficiency.

• Higher production speed
• More stable layer thickness
• Suitable for large-format plates

4.3 Strip Overlay Welding

Strip welding provides a wider deposition area and excellent surface uniformity, making it suitable for industrial wear plates requiring consistent performance.

5. Welding Quality Control Parameters

During automatic welding, manufacturers control several key parameters:

范围	Influence on Product Quality
Welding current	Controls heat input and deposition rate
Arc voltage	Affects bead shape and penetration
Travel speed	Controls overlay thickness and dilution
Heat input	Determines thermal stress and microstructure

6. Common Welding Defects and Solutions

缺点	Main Cause	Prevention Method
开裂	Excessive cooling rate, high thermal stress, improper preheating	Optimize preheating and cooling procedures
Porosity	水分, contamination, unstable shielding conditions	Improve surface cleaning and welding control
Slag inclusion	Improper welding speed or insufficient cleaning	Optimize welding parameters and remove slag between passes
High dilution rate	Excessive penetration into base steel	Adjust current, voltage, and travel speed

7. Post-Welding Cooling and Stress Control

焊接后, controlled cooling is required because overlay plates contain different materials with different thermal expansion characteristics.

Slow cooling helps:

• Reduce residual stress
• Improve crack resistance
• Maintain bonding integrity
• Stabilize the wear layer structure

8. Leveling, 切割, and Final Processing

冷却后, the overlay plate enters finishing operations:

• Plate leveling
• CNC cutting
• Dimension adjustment
• Edge preparation
• 定制制造

These processes ensure the final product meets customer requirements for installation and fabrication.

9. Final Inspection Before Shipment

A professional quality inspection system evaluates:

Inspection Item	目的
硬度测试	Verify wear resistance performance
Thickness measurement	Confirm overlay layer consistency
Visual inspection	Identify surface defects
Metallographic examination	Check bonding structure and carbide distribution

10. Arc Welded Overlay Plate Solutions from Teda Ganghua

Teda Ganghua provides chromium carbide overlay plate solutions manufactured for demanding industrial wear applications.

Our production capabilities include:

• Automatic arc welded overlay technology
• Customized wear layer thickness
• Large-size wear plate production
• CNC cutting and fabrication services
• Application-based material recommendations

With strict process control from substrate preparation to final inspection, Teda Ganghua helps customers reduce equipment downtime, extend replacement cycles, and improve total operating efficiency.

Learn more:

碳化物覆盖板

结论

Arc welded overlay plate manufacturing is a complete engineering process where every stage affects final performance. Proper surface preparation, controlled welding parameters, and rigorous inspection are essential for producing reliable wear-resistant plates.

用于采矿, 水泥, 钢, 和重工业应用, high-quality chromium carbide overlay plates provide a durable solution against severe abrasion and impact wear.