Purchasing Surfacing Wear-Resistant Plates

Considerations for Purchasing Surfacing Wear-Resistant Plates

When purchasing surfacing wear-resistant plates, there are several important factors to consider to ensure product quality and performance.

Size

• Overall Board Specifications: Check the specifications of the entire board. Reliable products will clearly list the board number, size, and welding specifications.
• Weld Consistency: Ensure the weld sizes are uniform. An error of more than 5 mm typically indicates substandard quality, except at the last weld of the welding gun.
• Welding Specifications: These must meet the required standards; otherwise, the product is considered defective.

Thickness and Flatness

• Thickness Standards: Different specifications of wear-resistant plates have varying thickness standards. Measure the middle of the weld and calculate the average of five values.
• Thickness Tolerance: An average tolerance of 0 to 0.7 mm is ideal, while a tolerance greater than 1 mm is generally unacceptable.

Surface Forming

• Surface Defects: Look for pits, defined as indentations with a diameter greater than 4 mm and a depth over 2 mm. Repaired pits should have a repair area no larger than 20 mm by 20 mm.
• Weld Quality: Inspect the weld surface for pores caused by gas leakage, poor welding pass molding due to low current or welding wire issues, and broken arcs.
• Layer Bonding: Ensure the wear-resistant layer is well-bonded to the substrate. Issues like layer detachment, large areas of pores at joints, cracks, or weld leaks indicate defective products.

Hardness and Chemical Composition

• Basic Assessment: Initial judgments about quality can be made through visual inspection and simple tools like calipers.
• Professional Testing: Hardness and chemical composition require professional testing equipment. The chemical composition varies by use, specifications, and the manufacturer’s capabilities.
• Hardness Standard: Conventional wear plates should have a hardness (HRC) of at least 55.

By paying attention to these factors, you can ensure that you are purchasing high-quality surfacing wear-resistant plates that meet your needs.

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