The tempering temperature should be determined according to the hardness requirements of Tapping tap

2025-09-01 14:54:51

When heat treating Tapping tap, only the blade and handle parts can be quenched, while the intermediate transition part is not quenched. This can make the transition part more resilient, facilitating future calibration. The quenching heating temperature should be chosen as low as possible to prevent grain coarsening and reduce the strength, plasticity, and toughness of Tapping tap.

Especially for small diameter Tap tapping teeth, it is better to reduce their hardness than to maintain a certain level of toughness and absolutely avoid high-temperature quenching. At the same time, the quenching heating time should not be too long, otherwise excessive heating temperature and insulation time can also lead to coarse grains, decarburization, overheating, and even overburning of Tapping tap, affecting their performance and service life, and even scrapping.

Adjust the tempering temperature according to the quenching situation in a timely manner; Avoid the first type of tempering brittle zone in steel, such as the tempering temperature of CrWMn steel being between 250 ℃ and 300 ℃. The tempering and insulation time should be as long as possible.

The hardness of carbon steel and alloy steel Thread sheath tap after heat treatment should be between 61-63HRC, and that of high-speed steel should be between 63-66HRC.

Practice has proven that details determine success or failure. If attention is paid to the above details in the production process of Tapping tap, it will greatly reduce heat treatment defects, distortions, and cracks, improve the qualification rate and service life of Tapping tap, reduce production costs, and increase economic benefits.