For annealing and tempering of wire and steel materials, please leave it to Toho Annealing.
We would like to introduce the equipment owned by Toho Annealing, which conducts various annealing processes for steel wires. All of our furnaces are batch-type pot furnaces, categorized into three types based on heat source and control method: A furnace, B furnace, and O furnace. 【Equipment Owned】 ＜A Furnace＞ ■ Operating Temperature Range: 500-700°C (-0,+10°C) ■ Atmosphere Gas: N2, DX ■ Program Control: Available ■ Processing Capacity per Charge: 6-10 tons ＜B Furnace＞ ■ Operating Temperature Range: 500-800°C (-0,+10°C) ■ Atmosphere Gas: N2, DX, RX ■ Program Control: Available ■ Processing Capacity per Charge: 6-12 tons ＜O Furnace＞ ■ Operating Temperature Range: 600-750°C (-0,+15°C) ■ Atmosphere Gas: None (Air Annealing) ■ Program Control: Not Available ■ Processing Capacity per Charge: 3-5 tons *We do not accept actual processing requests; we look forward to inquiries from companies that need support regarding annealing. *For more details, please feel free to contact us.
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【Characteristics of Heat Treatment】 <Atmospheric Gas: DX, N2> ■Finishing Features By adjusting the thickness of the scale, temporary rust prevention is possible, and it effectively reduces the need for pre-treatments such as pickling. ■Applicable Steel Types or Uses Steel materials with C ≤ 15 Suitable for those that will undergo various plating in subsequent processes. <Atmospheric Gas: RX, DX, N2> ■Finishing Features Prevents surface decarburization and carburization, allowing for softening treatment without changing the properties of the material. ■Applicable Steel Types or Uses S25C-S45C Steel materials with C > 15 SCR materials, SCM materials, SNC materials, SNCM materials, SAE1018, and other hard steels and special steels. <Atmospheric Gas: Air Annealing> ■Finishing Features Suitable for those requiring rust prevention on the surface after softening treatment. ■Applicable Steel Types or Uses Steel materials with C ≤ 15 Steel materials such as annealed iron wire with C ≤ 6 *For more details, please feel free to contact us.
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Toho Annealing began operations in January 1967 as a manufacturer of annealing processing for general mild steel wire materials. Subsequently, during Japan's period of rapid economic growth, there was a demand for materials used in high-strength construction materials and automotive parts, which led to the desire to soften the steel to make it easier to process without changing the designed steel composition. We developed unique atmosphere control technology and heat patterns to prevent decarburization and carburization during heat treatment while softening the steel. Additionally, as an extension of this, we started heat treatment for special steels and press-forged products, and we are currently also conducting heat treatment for some non-metal materials. There are various types of annealing depending on the application, such as "full annealing," "spheroidizing annealing," and "stress relief annealing." The purpose of annealing performed at the material stage is to soften the iron.