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Vacuum Furnace Systems, controls and Manufacturing
Vacuum Brazing and Vacuum Heat Treating Services
Thermal Spray Coating services, Plasma and High Velocity Oxy-fuel (HVOF) Spray Coatings and Inorganic Paint and Pack Coatings
Vacuum Furnace Technology column by Dan Herring, Metallography column by George Vander Voort, Vacuum Brazing column by Dan Kay, Vacuum Pump column by Howard Tring and other Educational Resources

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VAC AERO News, Education & Training

dan kay seminarKay & Associates Brazing Seminars

Since brazing plays an important part in your company’s products, plan to have your staff attend one of the high-powered, three-day seminars being held in 2016. Our Brazing Seminars cover all the essentials for successful brazing of commercial and aerospace components. The improvements to brazing operations that have resulted from these seminars have paid for the cost of the seminar many times over at many companies! Register your staff today! They WILL truly benefit from having attended this program!

Next Seminar Date and Location: Oct. 11-13, 2016 - Spartanburg, South Carolina

To Register on the Kay & Associates' Website CLICK HERE.

Vacuum Technology with "The Heat Treat Doctor"

vacuum heat treating furnacesMore About Vacuum Heat Treatment of Fasteners

The automotive, aerospace, medical device and construction industries rely heavily on the use of fasteners to secure component assemblies. For example, medical devices (e.g. dental & orthopedic implants, instruments) employ literally hundreds of different types fasteners to hold their assemblies together. Even though the components in the medical devices are small or even tiny, when a fastener fails, the device will almost always fail as well. The correct fastener ensures that the device goes together and stays together for the intended life of the assembly, and that the device performs as desired. Fasteners can overcome challenges in assembly, solve quality problems and significantly reduce the total cost of the device. Fasteners for Construction; Oval head, tapered head, round head (counter sunk) bolts, square head bolts and hex head bolts are typical products for the construction industry, manufactured from various grades of stainless steels and alloy steels.

Vacuum Brazing with Dan Kay

vacuum furnacesBrazing-Paste – Part 3: What happens when the BFM-paste “separates”?

This is the third in a series of articles dealing with brazing filler metal (BFM) in paste form, i.e., when the BFM powder is mixed with a suitable gel-binder to form an extrudable paste. As we’ve seen in the previous two articles, such BFM-paste can be supplied in small hand-held cartridges, or in a wide variety of larger sizes, up to and including large metal paste containers from which the BFM-paste can be steadily withdrawn either automatically or semi-automatically. An example of a semi-automatic system, in which paste is contained in a large container, attached to the bottom of which is a dispensing gun and hose. The small black hose in the top of the unit is an Figure 2. Note that the brazing paste is contained in a solid container at the top left of this photo, and could be looked at as being a large, metal-walled, cartridge, so to speak. Likewise, the dispensing head is also made of metal, and is known as a Positive-Displacement Dispensing head.

Metallography with George Vander Voort

vacuum furnaceIdentification of Phases in Stainless Steels by Etching

Failures in metallic components may be caused by any of the following factors or combinations of factors: Design shortcomings, imperfections due to faulty processing or fabrication, overloading and other service abuses, improper maintenance and repair and environmental factors. Not all failures are catastrophic. Many failures involve a gradual degradation of properties or excessive deformation or wear until the component is no longer functional. Failures due to wear or general corrosive attack usually are not spectacular failures, but account for tremendous material losses and downtime every year. Of course, early failures of the spectacular catastrophic order capture the most attention-and rightly so. Nevertheless, all failures deserve the attention of the investigator because they reduce production efficiency, waste critical materials, and increase costs. In some instances, they cause considerable damage or personal injury. Finally, failures can result in costly litigations.

Vacuum Pump Practice with Dan Herring

vacuum furnace systemsDry Pumps Part Two: Screw Type

We continue our discussion of dry pumps by focusing on screw pumps. As talked about in our last installment, dry pumps are becoming increasing popular as an alternative to oil sealed rotary vane pumps for many medium and high vacuum applications. Designers and users of vacuum furnaces must have a good understanding of how claw and screw pumps operate. This includes the principles of operation, pump design, sealing,  operating characteristics, features, purging, and ancillary devices. A dry screw pump is used alone when high vacuum is not required and slower drawdown is allowable, or with a Roots blower (aka booster) when higher performance is required. For the highest system performance, both a Roots booster  pump and a secondary high-vacuum pump are utilized with the primary pump, which provides the fastest pumping speed and highest ultimate vacuum. When used in series with either a booster pump, or with both a booster and  secondary high-vacuum pump, the primary pump is referred to as a "backing" pump.

Front and Bottom Loading Vacuum Furnaces

vacuum heat treating furnacesConstructed of the finest materials and craftsmanship, VAC AERO’s high performance vacuum heat treating furnaces are operator friendly and designed to minimize maintenance and downtime to deliver outstanding quality and  value to commercial and in-house heat treaters alike. VAC AERO’s vacuum furnaces are designed for rapid heating rates to very uniform temperatures at high vacuum levels and can be customized to suit unique applications such as high pressure gas quenching, high temperature heat treating, ultra-clean processing and more. VAC AERO’s high efficiency hot zones are designed for easy maintenance and reduced energy consumption and an external quench system allows for easy maintenance of the heat exchanger and quench motor. A high efficiency blower and motor combine fast cycle times and quenching speeds to provide uniform gas distribution and superior cooling performance from processing temperatures at pressures of up to 10 bar.

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