Good Quality Mill Paddles - Youke Alloy Smooth Plate YK-90 – Youke

Overview

YK-90 is a smooth surface chromium tungsten carbide weld overlay plate without cracks.
The manufacturing process of YK-90, along with the microstructure and chemical composition, give YK-80 its superior properties. YK-90 suited for applications requiring severe abrasion resistance at elevated temperatures up to 900℃. Large sheets or custom shapes are available and can be formed into complex shapes.

Manufacture

YK-90 is manufactured by advanced welding an abrasion resistant material to a mild steel base. Complex and chromium rich powder are fused to the base plate, creating a bi-metallic material with high abrasion & temperature resistance whilst still retaining ductility allowing forming and welding. Multiple overlay and backing plate thickness options are available.

Microstructure

A YK-90 microstructure consists of fine, primary M7C3 and MC carbides surrounded by
a eutectic mixture of carbides and austenitic matrix material. The very hard primary carbides form as hexagonal nodules and help to prevent wear of the hardfacing material. The austenitic matrix material provides mechanical support to the primary carbides whilst also helping to absorb impact.

1, Base Materials
➢ASTM A36（Q235B), ASTM A529A （Q345B）

2, Overlay Alloy Components
➢High Carbon, Chromium-rich
➢Cr-C-Mo-Nb-V-W-Ni-Fe

3, Hardness
➢55-62 HRC

4, Chemistry Alloy
➢Cr: 20-35%
➢C: 3-7%
➢MC Carbides

5, Microstructure
➢Primary M7C3 chromium-rich & complex carbides with austenitic and martensitic matrix.
➢Volume fraction ＞40%.

6, ASTM G65-Procure A(weight loss)
➢0.26g maximum

7, Standard Dimensions
➢Thickness: 5+5 to 12+25 mm;
➢Standard plate size: 1000/1200*3000mm.
➢Max plate size: 1500*3000 mm.

8, Tolerance
➢Thickness tolerance: ±1.0 mm;
➢Plate flatness: Within ±2.0 mm over 1.5 m plate length.

9, Applications
➢Loading Equipments（Bucket Liners、Grab’s edge plates、Dump truck bed etc.）
➢Mining Equipments（Fan Blades、Conveyor’s Liners etc.）
➢Construction Equipments（Liners for loader、bulldozer、excavator and drill pipes etc.）
➢Coal Mining Equipments（Liners for feeding chutes and hoppers, fan blade、pusher’s base plates、bucket’s liners etc.）
➢Cement Equipments（Liners for chutes、guide vanes for classifier、end cover、fan blade、cooling disc、conveyor trough etc.）
➢Metallurgical Equipments（Liners for Conveyors、sinters、apron feeders）
➢Power Generation（Liners for ash & slag pipes、coal mill housing plates、impeller casing、inlet of dust collectors、bucket wheel stacker and reclaimer hammer mills、hoppers、separators）

10, Fabrication
➢Welding, Cutting, Forming & Machining;
➢For the details, please find the service brochure.
*Various alloys and dimensions could be supplied depend on your different operating conditions and applications request.