What should be paid attention to when titanium plate parts are heat treated?

1.Before the heat treatment, the oil, paint, handprints and other foreign bodies on the surface of the parts (rags, fine iron chips, etc.) should be cleaned, otherwise it is easy to cause pollution when heating and affect the performance of the parts. In particular, the harm of handprints should be pointed out. The high temperature test shows that when the specimen is stressed and in contact with pure NaCl, the cracking of the specimen will occur, which is the result of hot salt stress corrosion. In 1955, it was found that surface cracks existed in Ti-6al-4V alloy samples after 371℃ creep test. After research and analysis, it is determined that the appearance of these cracks is usually related to handprints. Since the handprint is harmful to the workpiece, direct contact between the finger and the workpiece should be avoided during operation, and clean white gloves must be taken at room temperature. In addition, titanium alloy shall not be treated with aluminum, copper, etc., in the same furnace, but shall not be placed in the same tray for processing.

2.The parts are heated to a higher temperature during heat treatment, and maintained at a high temperature for a certain time. Because the heated material is soft and easy to deform, the position of the parts placed on the tray or bracket is very important, and if the tray itself is uneven, the parts will be deformed. If the heat treatment fixture is used to improve the deformation of the part, the expansion of the part and the fixture after heating should be taken into account.