Xinhua Industrial Co., LTD Quality Control

Quality control is the fundamental pillar of manufacturing high-performance carbide precision tools. Given their application in critical machining operations where tolerances are measured in microns, a rigorous and multi-stage QC protocol is non-negotiable. This process begins at the very inception with the inspection of raw materials—tungsten carbide powder and cobalt binder—for purity, particle size distribution, and consistency.

During production, every step is meticulously monitored. The mixing and milling process is controlled to ensure a homogeneous blend. After pressing, the "green" parts are checked for dimensional accuracy before sintering. The sintering furnace cycle (temperature, time, and atmosphere) is precisely regulated to achieve the final hardness, density, and mechanical properties without defects like cracks or voids.

Post-sintering, 100% of tools undergo a series of critical inspections. Dimensional checks using high-precision optical comparators and Coordinate Measuring Machines (CMMs) verify that every critical diameter, length, flute geometry, and angle conforms to the strictest specifications. Surface finish is scrutinized for any imperfections that could affect performance.

The material properties are verified through destructive and non-destructive testing. Hardness (HRA) is measured to confirm wear resistance, and transverse rupture strength (TRS) tests are performed on sample batches to validate structural integrity. For cutting tools, a sharp and consistent cutting edge is paramount, often examined under microscopes.

Finally, advanced coating processes, if applied, are controlled for thickness, adhesion (e.g., via Rockwell indentation tests), and composition. This end-to-end quality management system, often certified to ISO 9001 standards, ensures that every carbide tool delivered provides reliable, predictable, and superior performance, maximizing productivity for the end-user.