Reasons & Solutions for Stellite Tipping Problems on Saw Blade Teeth

Typical Alloy Grade & Welding Process

Wisdom’s Co1, Co12, Fe306, Fe307 rod are widely used in teeth of band saw blade, the rod size is from 2.4 – 6.4 mm. They are commonly used to extend the service life. Welding process includes TIG, OXY-acetylene, ERW and PTA.

Frequent Applicable Problems

1. Sparking

Reason:
Deposit may increase when steel water in melting furnace runs out, which leads to the less-purity of welding rod. Spark situation then occur in certain situation.

Solution:

Maintain steel water in a constant level when continuous casting, meanwhile, adjust chemical composition in certain elements.

2. Less-smooth through feeder

Reason:
Welding rod straightened by regular process is suitable for any manual process. However, automatic machine has much higher requirement on the straightness.

Solution:
Extra control should be implemented regarding straightness according to detailed application information from customers.

3. Porosity

Reason:
Customer requirement haven’t been gathered enough in terms of unusual welding current and gas flow in PTA welding process.

Solution:
Chemical formula should be accommodate to every specific case with regard to current and gas flow, especially when applying PTA welding machine.