Carbide inserts are widely used in machining for their hardness, wear resistance, and ability to maintain a sharp edge at high temperatures. However, even with these advantages, there can be common problems encountered during machining with carbide inserts. Here are some of the typical issues and their potential solutions:

1. Flank wear

Problem

• Wear on Clearance Face
• fast wear on Clearance face results in poor surface quality

Ways to improve

• Reduce cutting speed
• Gradually increase feed
• Use inserts with better wear resistant material or coating
• Increase cooling fluid supply
• Clockwise milling

2. Crater wear

Problem

• Crater Wear on rake face
• Excessive crater wear reduces strength of cutting edge

Ways to improve

• Reduce cutting speed
• Reduce feed
• Use inserts with positive rake angle,more durable material or coating.
• Avoid built-up edge

3. Chipping

Problem

• Cutting Edge Damage
• Small breakage of the cutting edge results in poor surface quality and excessive flank wear

Ways to improve

• Cutting edge been cracked,then to increase cutting speed
• Eliminate vibration factors
• Uneven workpiece material,then to reduce cutting speed and increase feed,Clockwise milling.
• Whether insert body is annealed, the shim is broken, or the blade screw needs to be replaced.
• Use higher strength inserts material
• Change inserts with strong edge
• Chilled cast iron workpiece requires negative rake angle inserts
• Milling tools with round inserts are with best impact resistance

4. Plastic deformation

Problem

• Plastic Deformation
• The cutting edge collapses or clearance face recessed, resulting in poor cutting control and surface quality. The flank wear would cause inserts breakage

ways to improve

• Choose a harder grade with higher resistance to plastic deformation
• Cutting edge collapses: Reduce cutting speed
• Clearance face recessed: reduce feed

5. Built-up edge

Problem

• Built-up Edge
• Built -up edge results in poor surface quality,when falling down,it would cause breakage of cutting egde

ways to improve

• Increase cutting speed
• Gradually increase feed to the optimum chip breaking thickness
• Use CVD Coating Inserts
• Adequate high pressure coolant fluid or air to prevent secondary chip breaking
• Clockwise milling
• Positive rake angle tool and inserts

6. Notch wear

Problem

• Notch Wear
• Notch wear results in poor surface quality and breakage

ways to improve

• Increase cutting speed
• Gradually increase feed to the optimum chip breaking thickness
• Use CVD Coating Inserts
• Adequate high pressure coolant fluid or air to prevent secondary chip breaking
• Clockwise milling
• Positive rake angle tool and inserts

Addressing these common problems often involves a combination of selecting the right insert for the job, using proper cutting parameters, ensuring the tooling is in good condition, and maintaining the machine and tooling properly. Regular maintenance and tool inspection can also help prevent many of these issues.