広築 List of Products and Services

This is a composite heat treatment device that can process not only oil-quenched steel and air-quenched steel, which traditionally required dedicated machines, but also high-speed steel that requires high-temperature heating, all in one unit. The heating chamber, gas cooling chamber, and oil tank are integrated within a fully sealed structure, allowing for heat treatment in a nitrogen atmosphere, which reduces oxidation of the workpieces. 【Features】 　▶ Capable of quenching oil-quenched steel, air-quenched steel, and high-speed steel all in one machine 　▶ Space-saving installation 　▶ Easy operation for anyone due to automatic operation via programming 　▶ Good temperature distribution thanks to heaters installed on six sides 　▶ Easy maintenance with muffler-less method and unit heaters ◎ Please feel free to contact us.

This is a vertical atmosphere furnace for quenching molds and jigs. By introducing nitrogen gas into the furnace, simple non-oxidizing heat treatment can be performed. There are two types: one for air-cooled steel and one for oil-cooled steel. In the case of air-cooled steel, it consists of a heating furnace and a front platform, while for oil-cooled steel, it is composed of a heating furnace and an oil tank. *The front platform for air-cooled steel is optional. With its simple structure and easy operation, it is an ideal device for in-house production and switching from atmospheric heat treatment!

The heating chamber and oil tank are integrated into a fully sealed structure, allowing for oxidation-free quenching. Additionally, once the workpiece is inserted onto the furnace floor, the process automatically performs <slow heating> ⇒ <rapid cooling> until the quenching is complete, indicated by a buzzer. The heating program, created from a wealth of data, along with uniform heating, uniform cooling, and vertical quenching, achieves stable quenching with minimal distortion. Heat treatment of various small quantities and precision parts can be easily performed in-house, and it is also widely used in overseas factories.

This is a highly airtight automatic carburizing quenching furnace suitable for repeated intermittent operation. The heating chamber, cooling chamber, and oil tank are integrated, allowing for automatic processes from carburizing to diffusion, uniform heating, and quenching. 【Features】 ▶ Uses a heat-resistant steel muffle, ensuring high airtightness and optimal for repeated intermittent operation. ▶ Stable atmosphere and quick startup. ▶ Energy-saving, compact type ideal for small production runs. ▶ The transformation furnace is *Optionally, two types of calculators can be installed: O2 sensor: By installing it, the carbon concentration in the furnace atmosphere can be calculated. Carbon potential calculator: Calculates the carbon concentration in the furnace atmosphere based on the sensor's electromotive force, furnace temperature, and CO concentration.

Molds and tools need to undergo tempering after hardening, and the quality of the tempering can significantly affect the lifespan of the molds, potentially increasing it several times. The RBM type has a wide usage temperature range of 100 to 550°C, allowing for various low and medium temperature heat treatments! Additionally, it is used not only for tempering but also for stress relief after welding, annealing, and heating shrink fitting processes. *There is also a high-temperature specification RH type that can handle tempering of hot work die steel and high-speed steel. 《Purpose of Tempering》 　　▶ To remove internal stresses caused by hardening and prevent cracking 　　▶ To stabilize unstable hardened martensite and prevent time-dependent deformation 　　▶ To temper to an appropriate hardness for the application, providing toughness 　　▶ Effective for high-temperature tempering of SKD molds and preventing cracking during wire-cut electrical discharge machining 　　▶ High-temperature tempering helps prevent dimensional changes at elevated temperatures and improves resistance to heat checks.

For the tempering of die steel (SKD) and high-speed steel (SKH), performing two or more repeated tempering can restore toughness and reduce residual stress. However, in conventional furnaces, this operation was done manually, which was labor-intensive and time-consuming. The "TAF type" automatically repeats heating → cooling → heating when the workpiece is set, allowing for nighttime operation without the need for manual labor, thus contributing to a reduction in lead time. 【Features】 ■ Automatic repeated tempering function 1st time: Improvement of toughness, secondary hardening, reduction of residual stress, decomposition of residual austenite, generation of new martensite 2nd time: Tempering of new martensite, reduction of residual stress ■ Operation is via a touch panel, allowing for easy programming ■ Automatically repeats heating → cooling → heating when the workpiece is set ■ Requires no manual labor and can operate automatically at night *For more details, please contact us or view from "Download Catalog."

Thermal's continuous furnaces have a proven track record of several hundred units both domestically and internationally, and they are active in various fields. By treating stainless steel in a reducing atmosphere (hydrogen, hydrogen + nitrogen, ammonia decomposition gas), even slight surface oxides can be reduced, allowing for a bright (shiny silver-white) finish. Although hydrogen-based gases are used, safety devices are installed to ensure safe operation. We conduct experiments and prototypes of product samples and propose optimal conditions. ◆ Features of Thermal's Stainless Steel Bright Heat Treatment Furnace ◆ - By treating stainless steel in a reducing atmosphere, even trace amounts of surface oxides can be reduced, enabling bright treatment. Additionally, an optional atmosphere circulation cooling mechanism (rapid cooling mechanism) can be equipped. - Unlike vacuum furnaces, there is no evaporation or deposition of chromium, resulting in shorter heating times and faster cooling times, which leads to excellent mechanical properties and corrosion resistance. 【We also accept contract processing using this equipment installed at our Nasu factory (Tochigi Prefecture).】

Thermal's continuous furnaces have a proven track record of hundreds of units both domestically and internationally, and are active in various fields. For the joining of metal products (precision parts, shapes that cannot be welded, simultaneous multi-point joining), a flux-free, non-oxidizing brazing in a furnace is optimal. Various heating furnaces and atmosphere gases suitable for the base materials and brazing materials can be selected, and we conduct experiments and prototypes of product samples to propose the best conditions! ◆ Advantages of Thermal Brazing Treatment Furnaces ◆ - Brazing without flux is possible - Non-oxidizing heat treatment can be performed, eliminating the need for post-treatment pickling - Simultaneous multi-point brazing is possible - Hardening or bright annealing can be performed simultaneously with brazing - By installing a circulating cooling mechanism, it is possible to prevent the scattering of brazing materials (optional) [We also accept contract processing using this equipment installed at our Nasu factory (Tochigi Prefecture).]

This is a simplified and energy-efficient bell-type bright annealing furnace based on European industrial furnace technology. It uses gas atmospheres such as hydrogen, nitrogen, and argon, and the temperature distribution is within ±5℃ due to hot air circulation! The heating, holding, and cooling times can be reduced by 30%. It allows for uniform annealing, with no variations in hardness, grain size, or tensile strength, resulting in excellent drawability.

This is a nitriding and soft nitriding treatment device equipped with the nitriding potential control unit "NITRONAVI" manufactured by Parker Heat Treatment Co., Ltd. By controlling the nitriding potential [KN value] with NITRONAVI, it is possible to selectively control the steel surface to a compound layer-free state, gamma prime phase (γ' phase), and epsilon phase (ε phase). Advanced feedback control allows for real-time management and the ability to save processing history data. **Features** - Achieves low cost, short delivery times, and high reliability due to a high standardization rate. - Flexibly responds to unique needs with a wide range of options. - Provides recipes that realize optimal material properties. - Support for stable operation by service engineers from Hirotsuki and Parker Heat Treatment Co., Ltd.

The RAV type opens and closes the front side doors to facilitate the loading and unloading of workpieces, making it easy to operate. It is a compact system that integrates a heating furnace, cooling device, and vacuum equipment. After reducing pressure with a vacuum pump, clean atmosphere gas is introduced for heating, allowing for more complete air replacement in the furnace in a shorter time, while significantly saving on purge gas usage! It uses gas atmospheres such as hydrogen, nitrogen, and argon, and ensures a uniform temperature distribution through hot air circulation. It features programmed heating and a forced cooling mechanism after heating, enabling efficient unmanned automatic operation. *For more details, please download the catalog or contact us.*

The TL-type tabletop electric furnace is a long-selling electric furnace that is the easiest to use among small furnaces and is used in major factories across the country (automotive, electronics, molds, tools, research institutes, schools). It is suitable for the heat treatment of metals such as molds and machine parts, designed to generate a high amount of heat, and is a robust, long-lasting, and user-friendly box-type furnace. It demonstrates excellent performance in terms of energy efficiency, durability, temperature accuracy, and ease of use. 【Features】 - A wide range of sizes from tabletop to medium and large - Fast heating rate, robust and long-lasting - Good temperature distribution and excellent heating efficiency - Compact energy-saving type - Parts replacement can be handled in-house (only pliers and screwdrivers are needed as tools)