Tamayakin’ initiative
Heat treatment work flow and notes
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Overview.
Heat treatment work refers to the process from receipt of treated products through pre-treatment, main treatment, post-treatment, and inspection to shipment, and prior discussion at the time of receipt is especially important.
01 Important Points for Preliminary Meeting
When placing an order for heat treatment processing, a thorough preliminary meeting must be held between the ordering party and the party receiving the order. This is because problems such as heat treatment defects can become complicated if this preliminary discussion is insufficient.
In the preliminary meeting, it is only natural to confirm specifications such as the specified hardness, but there are many things that need to be discussed, such as the hardness measurement position and measurement conditions. For example, even if the specified hardness is agreed upon, if the position of the measurement is not specified, even if the treated product passes the order-taker's measurement, the ordered product may be measured at a different location and fail to pass the test. Since the uniformity of hardness varies depending on the material, shape, and dimensions of the workpiece, the position of the measurement should be discussed with certainty.
02 Points to keep in mind from heat treatment preparation to the main treatment
Preparation for heat treatment and pre-treatment follow the preliminary meeting. After confirming the specifications, the heat treatment pattern is determined. Careless handling may cause mixing of treated materials, dents, or deformation.
The heat treatment pattern is determined based on the usage of the treated material and the consistency between the material material and the required specifications. For example, in the case of tools, the Toughness Emphasis on wear resistance or wear resistance, the heat treatment pattern will vary depending on the material.
03 Notes from inspection to shipment
When measuring hardness and observing metallographic structure, cutting is performed with a grinding wheel, but care must be taken to avoid alteration due to processing heat.
When shipping, it is important to note that while careful handling of treated products is a matter of course, vacuum heat-treated products in particular are prone to rust, so storing them in a dry place is recommended, even if they are stainless steel. In addition, care should be taken not to handle them with bare hands, and rust-preventive measures, such as using rust-preventive paper for packaging, are essential.