Bending strength is a very important physical property of cemented carbide. For high-cobalt alloys, its strength increases with the increase of W content; while for low-cobalt alloys, the opposite is true.
This is because after the cobalt phase of the high-cobalt alloy is solid-solution strengthened by W, the plastic deformation resistance of the alloy is improved, thereby increasing the strength; while the low-cobalt alloy is inherently brittle, and after the cobalt phase is solid-solution strengthened by W, the strength is reduced. Alloy strength.
The relationship between wear resistance and W content should be explained by the performance of the bonding phase. The higher the W content, the more cobalt is strengthened and the higher the wear resistance; the alloy has a small amount of eta phase which does not hinder the wear resistance during use. However, when the amount of eta phase is large, the alloy is brittle and is prone to chipping or breaking, causing damage to alloy tools.
Post time: Jan-04-2024
