The quality test of the induction quenching should generally include appearance, hardness, hardened region, seven projects of hardening, metallographic tissue, deformation and cracks. Guangyuan variable frequency induction heating equipment also emphasizes the quality inspection of induction quenching parts.
1. The appearance of the induction quenching surface must not have flaws such as burning, cracks. Normal quenching surface is a white white (oxide).
2. The hardness can be taken out with a slight-hard meter, and the sampling rate is determined according to the importance of the part and the process stability, typically 3% to 10%, and then supplemented by file inspection.
3. Small batch production in the hardening area often uses a ruler or caliper measurement, or the hardened surface of the strong acid can also be tested.
4. The depth of the hard layer depth of the hard layer is mostly used to measure the quenched layer depth of the part by cutting the quenching material.
5. The material of the metallographic induction quenching parts is mainly medium carbon steel and cast iron, and the microstructure of the quenching member is generally corresponding to the hardness.
6. Deformation deformation mainly check the shaft parts, generally using the center frame, percentage table to measure the quenching of parts.
7. A flour powder detection is required after quenching of fragments, and the equipment has been shown to be crackled with a good plant.