One Minute Mentor: Salt Bath Nitrocarburizing Equipment

May 6, 2024
Source: ASM International

One Minute Mentor: Salt Bath Nitrocarburizing Equipment

Modern salt bath nitrocarburizing units can be arranged as fully automated and contained lines and usually consist of an air-preheating furnace, one or several salt bath nitrocarburizing furnaces, which can either be heated electrically or by gas combustion, and a cooling unit that can be an oxidizing salt bath. Such oxidizing posttreatment builds up a thin and dense oxide layer on top of the compound layer that significantly increases the corrosion resistance. 

Online monitoring of the chemical composition is not required due to the high stability of the melt and the automatic supply of refill salt and regenerators. The nitrocarburizing line usually ends with three- to four-step washing cascades that also act as a regeneration system for the salt.

Gas nitriding and nitrocarburizing is the most sensitive process regarding passivation effects typical for medium- to high-alloy tool steels. Therefore special attention must be paid to cleaning and pretreatment processes such as preoxidation, controlled oxinitriding, or the use of chemicals such as hydrazine. On the other hand, gas processes have the best accessibility for boreholes and thin gaps.

For more information, click on the link below (subscription required). Then scroll to Figure 21. R Schneider; R. Mesquita; W Schützenhöfer, Distortion in Tool Steels, ASM International, 2014  https://doi.org/10.31399/asm.hb.v04d.a0005958

 

ACME spearheads eco-friendly transition in district heating across the EU


Source: ASM International

ACME spearheads eco-friendly transition in district heating across the EU

ACME, Canada, is spearheading the Eurpean Union’s transition from fossil fuel systems to advanced, high-efficiency electrode boilers. This transition not only promises a significant reduction in carbon emissions but also enhances the energy efficiency of district heating networks across the EU.

District heating, crucial for centralized heat generation and distribution in urban areas, is undergoing a transformation with the installation of cutting-edge electrode boilers. These boilers are praised for their ability to operate on electricity derived from renewable sources such as solar, wind, and hydro power, marking a significant step towards sustainable energy use.

Robert Presser, vice president of Acme Engineering, explains the technological superiority of electrode boilers, “Unlike traditional gas or oil-fired boilers, electrode boilers can achieve full capacity in about 90 seconds with a 100% turndown ratio, ensuring that no energy is wasted. This rapid responsiveness, coupled with the absence of combustion, makes these boilers highly efficient and environmentally friendly.”

The electrode boilers utilized in these upgrades, such as Acme’s CEJS and CEJW models, are capable of converting nearly 100% of electrical energy into heat, eliminating losses typically associated with stack or heat transfer. With capacities ranging from 6MW to 68MW, these boilers are designed to meet the rigorous demands of large-scale heating needs while occupying minimal space.

Presser also highlights the economic and operational benefits of these boilers, “Electrode boilers are not only cleaner but also more compact and easier to install compared to conventional systems. They require fewer components and minimal maintenance, reducing long-term costs and enhancing reliability.”

EU municipalities and businesses are increasingly recognizing the value of integrating these advanced technologies into their district heating frameworks. As the effects of climate change intensify, the shift towards these efficient, renewable-energy-powered systems is seen as critical in meeting both current and future energy needs while adhering to stringent decarbonization targets.

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One Minute Mentor: vacuum furnace setup

April 15, 2024
Source: ASM International

One Minute Mentor: vacuum furnace setup

A simple but most effective and very flexible vacuum furnace setup, the single-chamber furnace, consists of one chamber in which the workpiece is both heated (convectively, through vacuum heating) and cooled. Cooling or quenching is accomplished by a closed-loop cooling system.

The pressure vessel is filled with inert gas. This gas is circulated inside the chamber, blowing the inert gas across the workpieces to pick up heat and for further recooling across an internal or external heat exchanger. In order to quench rapidly enough to obtain the desired microstructure of tool steels in various sizes and shapes, it is necessary to increase the pressure and/or flow patterns of the quench gas (usually nitrogen). This is accomplished by high-velocity, high-pressure blowers that have reported cooling gas pressures of up to 20 bar. Turbine powers up to 450 kW are necessary to handle these quenching processes.

For more information, click on the link below (subscription required). Then scroll to Figure 15. R Schneider; R. Mesquita; W Schützenhöfer, Distortion in Tool Steels, ASM International, 2014  https://doi.org/10.31399/asm.hb.v04d.a0005958

One Minute Mentor: Vacuum Furnaces

March 26, 2024
Source: ASM International

One Minute Mentor: Vacuum Furnaces

Driven by the development of new tool steels—which were property-wise tailor made for applications such as aluminum die casting, drilling, and tools and dies for the plastic industry—but also due to rising dimensions of the tools, the demands on vacuum-hardening technology have changed in recent decades. One of the most important considerations that must be met is the accomplishment of highest dimensional stability with optimal microstructural properties and minimal change of the surface of the workpieces. Minimizing exposure to air during the heat treatment by reducing the quantity of oxygen in a heat treatment furnace, as with creating a vacuum, is an excellent method for preventing changes in surface appearance and chemical composition.

For more information, click on the link below (subscription required). Then scroll to Figure 14. R Schneider; R. Mesquita; W Schützenhöfer, Distortion in Tool Steels, ASM International, 2014  https://doi.org/10.31399/asm.hb.v04d.a0005958

Process and parameters for laser assisted localized heat treatment in manufacturing applications


Source: ASM International

Process and parameters for laser assisted localized heat treatment in manufacturing applications

University of Azurem, Portugal, presents information and results relevant for the development of a laser heat treatment process suitable to improve manufacturing in high strength steel and high strength aluminum alloys.

The challenges with manufacturing of such materials include springback effect and localized fracture. The study details heat cycle and their effect in metallurgical state and mechanical properties. Such laser induced heat treatment process is intended to improve the forming behavior of metal parts in challenging metal forming conditions, in particular for the delay or avoidance of localized fracture. Results for strength, hardness and elongation properties are presented. It was concluded that it is possible to locally modify yield strength and hardness using process duration suitable for industrial applications. Suitable process temperature ranges and target heat cycles were identified. 

A positive effect of material softening was observed in both hardness and strength properties. However, in some cases a reduction of ductility is apparent which must be considered for targeted industrial applications. The dimension of the heat-affected zone was also considered as design variable for the industrial process development. Preliminary results were obtained in a development forming tool.

https://journals.sagepub.com/doi/full/10.1177/09544054221135684

Ipsen Launches “Ipsen Connect,” to Streamline Customers’ Operations


Source: ASM International

Ipsen Launches “Ipsen Connect,” to Streamline Customers’ Operations

Ipsen, Cherry Valley, IL, announced a new digital gateway, Ipsen Connect. The customer service portal simplifies access to essential resources, including order history, service requests, and furnace documentation.

Key features of Ipsen Connect include:

  • Convenient part management: Request or reorder parts, view order history, and access furnace documentation seamlessly.
  • Streamlined service requests: Schedule maintenance, troubleshooting, or calibration appointments in just a few clicks.
  • Best practices and expert insights: Access troubleshooting guides, online training videos, and answers to frequently asked questions.
  • Real-time updates: Keep your operations informed and on track with live updates, including order status, active quotes, planned maintenance, and scheduled service appointments.

https://ipsenglobal.com/knowledge-center/ipsen-launches-a-cutting-edge-digital-platform-ipsen-connect-to-streamline-customers-operations/

L&L special furnace company ships large box furnace for investment castings company

March 4, 2024
Source: ASM International

L&L special furnace company ships large box furnace for investment castings company

L&L Special Furnace Company, Aston, PA, delivered a large floor-standing box furnace to the heat-treating department of an investment castings supplier. The furnace will be used as support in the customer’s tool and die production along with tempering of finished castings.

 

The L&L model XLE3436 box furnace has an effective work zone of 34” wide by 22” high by 32” deep. It is equipped with a direct-lift vertical door with a floor switch to activate. The cantilevered vertical door eliminates the need for the upright structure to reduce the overall height of the equipment.

 

The furnace includes a program control and overtemperature protection. A four-zone SSR control with digital biasing is provided to balance temperature gradients. The XLE3436 also features a paperless chart recorder with six thermocouple inputs, a heavy-duty Inconel sheathed thermocouple, a recirculation fan, and an atmosphere-sealed case for deployment with inert atmospheres.

 

The inert blanketing gas enables the part to be heat-treated with minimal surface de-carb. A stack light indicates the furnace status via an audible and visual indicator light mounted on top of the control.

 

Additionally, the furnace is equipped with a pyrometry package that has reference control thermocouple ports along with corner locations to record the high and low points within the unit as indicated by the latest temperature uniformity survey.

 

All L&L models can be designed with various options and be specifically tailored to meet your thermal needs. The company also offers furnaces outfitted with pyrometry packages to meet ASM2750. Options include a variety of control and recorder configurations. A three-day, all-inclusive startup service is provided with each system within the continental US and Canada. International startup and training service is available by factory quote.If precise temperature control and uniformity is key to your process, then L&L is a great choice.

 www.llfurnace.com

Harper Furnace Technology enables high performance silicon anodes


Source: ASM International

Harper Furnace Technology enables high performance silicon anodes

Harper Furnace Technology, Buffalo, NY, announced the development of high temperature thermal process solutions to enable production at several silicon anode battery material companies in 2024. Silicon anode material offers significantly higher specific capacity than traditional graphite anode materials enabling higher power density, faster charge times and smaller carbon footprint than current batteries. 

 

Harper has entered engineering design and equipment supply contracts for pilot and production scale equipment with its USA-based customers, many of whom are funded in part by grants from the U.S. Department of Energy. The Harper technology includes indirect electrically heated, continuous rotary, vertical and horizontal conveyor furnace systems for each customer’s unique thermochemical processes. The Harper furnaces include tight control of the process atmosphere enabling safe and reliable continuous operation, are rated for temperatures between 800˚C and 1,800˚C and will have capacity up to 1,000 metric tons per year. Beyond the pilot-scale equipment projects, Harper is actively engineering the next generation of equipment solutions for these customers whose commercial scale plants will require capacity of 20,000 – 40,000 metric tons per year for the electric vehicle (EV) market.

 

https://www.harperintl.com/app/uploads/2024/02/Silicon-Anodes-Press-Release-February-2024.pdf

Wisconsin Oven ships batch ovens to the manufacturing industry


Source: ASM International

Wisconsin Oven ships batch ovens to the manufacturing industry

Wisconsin Oven, East Troy, announced the shipment of two custom-designed Gas Fired Batch Ovens with roll-up doors. The ovens will be used to hold molded urethane wheels prior to a curing process.

The batch ovens have a maximum operating temperature of 350°F and work chamber dimensions of 9’ wide x 4’6” long x 10’6” high. The ovens are designed with electrically operated roll-up doors in the front of the oven constructed from high-temperature fabric. The door controls allow the door to open halfway or all the way by a command from a loading robot. In addition to the roll-up door on the front, a bi-parting, side-hinged, horizontal swing door is located on the rear of each oven.

These batch ovens feature a horizontal airflow arrangement, which is ideal for products arranged in multiple tiers where heated airflow cannot be directed vertically through the product. Both ovens utilize a Watlow F4T digital controller that includes a 4.3″ color touch screen, PID temperature control with adaptive tuning, and Ethernet communication capabilities for temperature control. A remote display for the flame relays is also mounted to each control panel to provide an annunciation of operation along with fault and diagnostic information.

 

https://www.wisoven.com/news/wisconsin-oven-ships-batch-ovens-manufacturing-industry

Nitrex Partners with Telfer School of Management

February 6, 2024
Source: ASM International

Nitrex Partners with Telfer School of Management

Nitrex, Quebec,  announced a collaboration with the Telfer School of Management, with the aim of nurturing innovation and cultivating the next generation of visionaries through the new PhD scholarship in Digital Transformation and Innovation (DTI). 

Nitrex said that this partnership echoes their commitment to driving digitalization, not only within the heat treat industry but also within academia. They added that this scholarship marks a significant leap in empowering brilliant minds to spearhead groundbreaking research, shaping the future technological landscape of industrial manufacturing.

Read further here.