広築 List of Products and Services

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.

• Other metal materials
• Electric furnace

Introducing three brands of heating devices and heat treatment furnaces that combine advanced technology! We offer a wide range of equipment tailored to meet various needs, and we will propose the most suitable device for you. 【Holimesy】 A lineup of various devices necessary for the melting process in die casting manufacturing lines is available! We can flexibly respond to the configuration of the line and the arrangement of devices based on the conditions and objectives of the manufacturing site, while also enabling the construction of an optimal and effective molten metal supply system, especially for production-focused manufacturing environments. 【AdvanHeat】 With the thermal technology cultivated since our founding and the latest technology, we are engaged in new material solution engineering that supports everything from research and development of new materials to their commercialization. We provide thorough support for research, development, and production of new materials according to your needs. 【Thermal】 We have a rich lineup of metal heat treatment devices. We can propose heat treatment furnaces tailored to specific purposes such as quenching, tempering, and annealing, or based on the type of material, whether ferrous, non-ferrous metals, or non-metals, as needed.

• Steel
• stainless
• aluminum

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.

• Spring

Are you facing any of these concerns: 'There is nowhere to receive bright treatment for long items' or 'I want to braze, but I lack the necessary knowledge and equipment'? We offer contract processing for bright heat treatment of stainless steel and brazing in a non-oxidizing furnace using the continuous furnace developed and manufactured by our company. 　　　▶ Heat treatment is needed, but not on a daily basis. 　　　▶ We cannot purchase heat treatment equipment due to low production volume. 　　　▶ There is no person in charge who can handle heat treatment technology. 　　　　　－ We lack personnel with heat treatment know-how. 　　　　　－ There is no time to learn. 　　　▶ There is no space in our company for heat treatment equipment. 　　　▶ We know what we want to make, but we don't know how to do it. 　　　▶ We just want to consult about heat treatment. We will derive the optimal heat treatment conditions for your product processing and perform high-quality bright heat treatment using hydrogen gas. 《Heat treatment available for contract processing》 　♢ Annealing (softening, annealing) 　♢ Solution treatment 　♢ Quenching 　♢ Brazing Please feel free to contact us for inquiries or consultations.

• Processing Contract
• stainless

This is a technical document on heat treatment of stainless steel products. It summarizes the overview and fundamentals, as well as the heat treatment methods for various types of stainless steel, all in one book.

• stainless

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.

• Other machine elements

Technical Data Booklet "– For Designers – This is How I Want Heat Treatment of Structural Steel to Be Done" This booklet summarizes the basics and outlines of heat treatment for those who are beginners in heat treatment and are considering in-house production, as well as for mechanical designers, production engineers, and managers who are not specialized in metal heat treatment. By reading this, you will gain an understanding of the overview of heat treatment for structural steel, which will definitely be useful in machine design and parts manufacturing. ◆ Table of Contents ◆ 1. Representative Steel Grades for Mechanical Structural Steel 2. Sequence of Heat Treatment Processes 3. Annealing 4. Hardening 5. Tempering 6. Quenching and Tempering 7. High-Frequency Hardening 8. Carburizing Hardening 9. Nitriding

• Electric furnace

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.

• Other machine tools

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!

• Other machine tools
• Electric furnace
• Other cutting tools

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.

• Other machine tools
• Electric furnace
• Other cutting tools

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)

• Electric furnace

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.*

• Heating device

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).】

• stainless
• Annealing furnace
• Electric furnace

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).]

• Electric furnace
• Other processing machines

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."

• Electric furnace

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.

• Electric furnace
• Press Dies

We are currently offering a technical document summarizing the heat treatment of press copper alloys for engineers and skilled workers involved in the processing of press copper alloys. 【Contents】 ■ Types of press copper alloys ■ Pure copper, brass, and phosphor bronze ■ Nickel silver and beryllium copper ■ Horizontal bright heat treatment furnace for small parts *For more details, please contact us or view from "Download Catalog."

• Electric furnace

Poor heat treatment of molds often relates to hardness, quenching deformation, and wire cut deformation, with hardness issues being particularly prevalent. This document clearly outlines measures to address hardness defects during quenching, using case studies from a mold specialist employing an electric furnace, focusing on relatively small molds, and includes diagrams and charts.

• Electric furnace