March 29, 2026
In the first part, I thought about calculating the dwell time at the austenitization temperature. (https://www.jstconsultancy.cz/nadca-207-a-soaking-time/) The basis is the interpretation of aerospace standards, e.g. AMS
March 18, 2026
Those who know me know that I have been rock climbing for more than 45 years. It started in 1979, when I started working as the
March 15, 2026
A particular problem in the assessment of furnace records is the assessment of the correct soaking time and temperature of the austenitization segment. According to NADCA
February 3, 2026
With the increasing demand for LPC, it is crucial for the choice of equipment whether to quench in a gas stream or into oil. And if
November 11, 2025
I already wrote about carbonitriding under reduced pressure last year. https://www.jstconsultancy.cz/nitrocementace-jak-na-to-v-lpc/. My conclusion that the LPCN process is feasible is valid, but I have been instructed
November 7, 2025
As I have already described in the previous sections, in order for the LPC to work properly, both with regard to the layers and the condition
November 3, 2025
So we have already learned why it sometimes works and sometimes it doesn’t. Because I started with LPC in the socialism time, in ZEZ VVZ Liberec,
November 1, 2025
I’m still wondering how it is possible that some LPC systems need a batch surface area, others don’t, some LPC systems produce soot and others don’t,
October 19, 2025
Annealing to remove internal stress is one of the completely banal operations. The extent to which this thermal operation is necessary is decided by the designer
October 3, 2025
I keep asking myself how it is possible that I know that I know nothing. Even though I try to follow the events surrounding the heat
June 30, 2025
News are coming that always surprise me too. Janusz Kowalewski published statistics on the use of vacuum furnaces for the US aerospace industry. Brazing is in
June 18, 2025
It is not widely known that there is a big, I would even say fundamental difference between LPC from ECM and from SecoWarwick or BMI. And
June 3, 2025
The result of cooperation with VŠB Ostrava, Galvamet and a scientist/retired person in one person. Here I would like to thank doc. Ing. Tomáš Čegan
May 23, 2025
When I wrote my blog on LPCN (Low Pressure CarboNitriding), I had no idea it would get such a response. However, I was just trying to
April 27, 2025
The effort to improve the surface properties of low-alloy or pure carbon steels is quite evident. They are cheap, and nitriding or nitrocarburizing processes can improve
January 18, 2025
Nitrocarburizing of steels belongs to a group of progressive technologies that enable surface improvement of low-alloy steels. The advantage of this process is that it is
January 8, 2025
Isothermal annealing is a process that usually requires 2 temperatures. The first is the austenitization temperature, where we must be sure that the material has fully
October 14, 2024
In 2003 I visited the ECM in Grenoble for the first time. My interest was to purchase equipment with LPC for Bodycote CZ, and I was
August 29, 2024
When choosing a new furnace, we have to consider a number of criteria that I tried to describe in the previous chapters. In this last section,
August 25, 2024
In this section, we will focus on the energy consumption of annealing and tempering furnaces. There are a large number of different designs of tempering or
August 20, 2024
In the first part, we tried to define the furnace for annealing and tempering from the point of view of the surface condition of the processed
August 13, 2024
In my past career, I well remember our constant battle between what the management wanted and what we wanted. Our first vacuum tempering B64R furnace from
July 29, 2024
On my blog already in 2021, I published the theoretical course of the production process of the die-casting dies. https://www.jstconsultancy.cz/jak-na-zihaci-procesy-u-form-na-tlakove-liti/. Since time has advanced, I am
June 26, 2024
On Friday I had a video conference with GENCOA regarding the OPTIX device. I am very happy that my expectations were met. Perhaps since sometime in
April 22, 2024
After presenting a lecture on this topic in Wroclaw, I was approached by several people asking if I was serious. Yes, I mean it, and I’m
April 14, 2024
So, I made myself happy. I bought the iconic book Carbonitriding written by Bohumil Přenosil in 1964 year. Back then it cost 22.50 CZK, now I
March 15, 2024
Bivoj … When everyone says this name, Czech history comes to mind. But this name is borne by an in laser entered in the Guinness Book
January 25, 2024
An interesting article on the production of cemented carbides was published on the TAV Vacuum Furnaces blog. Here is a link to it. Link to TAV
December 23, 2023
An interesting article on the production of cemented carbides was published on the TAV Vacuum Furnaces blog. Here is a link to it. Link to the
December 17, 2023
As a philosopher would say, everything good is bad for something… Carburizing under reduced pressure, or vacuum carburizing or low presssure carburizing has the advantage of
December 10, 2023
I ran into a problem. A reputable supplier of low-pressure carburizing furnaces has supplied a brand-new vacuum furnace for this technology, but without the default TUS.
November 4, 2023
Vacuum furnace maintenance is an important part of vacuum processes. If everything is working, we tend to do nothing. However, as soon as a problem appears,
October 11, 2023
The announced acquisition of Lake City HT and Stack Metallurgical Group in the US is something to be expected. HIP technology is the limiting factor for
October 9, 2023
In the current energy crisis, everyone is looking for some way to survive. Ipsen came up with his idea of hybrid furnace, where when green electricity
September 27, 2023
In July of this year, the new standard ISO 20431:2023, concerning heat treatment and quality assurance, was published very discreetly. Seemingly similar to CQI-9, in fact
June 25, 2023
After visiting Thermprocess 2023 in Dusseldorf, I was left a little scared. At the Chinese company Fulcrum-HSS, I found a mention of the 14th five-year plan
June 4, 2023
At the Heat Treatment Forum in Wroclaw, Janusz Kowaleski from Ipsen had an interesting presentation on “Choosing the right vacuum furnace”. All aspects of the selection
May 25, 2023
In 1992, I presented my doctor dissertation focussed on combination of Titanium nitride and plasma nitriding. So, it’s been more than 30 years since I tried
May 20, 2023
As I have long recommended this technology for testing thermal fatigue stress relaxation for die casting dies, I was a bit unhappy as I could not
April 13, 2023
Today, everyone started talking about EURO 7 and related developments in the automotive industry. What will be the effects on custom colorers? Let’s face it, minimal.
March 17, 2023
Although it is still not clear whether it works, it is only because no one has tried it in CZ yet. But nowadays, when we are
December 11, 2022
As a forensic expert, I also deal with litigation in the field of the manufacturing and use of die casting dies. In this branch it can
October 17, 2022
So this article, published on the EOS blog, really pleased me. By Davy Orye, Team Manager Additive Minds Consulting, EOS GmbH. https://www.eos.info/en/blog-articles/possibilities_for_orthopedic_implants And the reason for
October 7, 2022
Back in the days of Bodycote, I lectured on an alternative method for releasing internal stresses on die casting dies. At first glance, this method is
July 25, 2022
After a long period of uncertainty, Nadca issued its publication No. 550 entitled “Tooling Certification for Die Casting, Die components fabricated by Additive Manufacturing”. I opened
June 9, 2022
An interesting seminar of the Czech Association for Heat Treatment of Metals … June 9, 2022 Jiří Stanislav
June 5, 2022
Duplex coating technology is based on a combination of nitriding and thin film deposited by PVD or PACVD technology (TiN, TiCN, TiAlN, TiB2, etc.). Because the
June 5, 2022
Sometimes you come into the company and you know right away that you don’t belong there. The exact opposite was the meeting in SHM Šumperk. Although
February 27, 2022
Last week I attended a webinar on 3D printing for medical applications. Among other things, Mr. Dalibor Vojtěch from the Institute of VŠCHT in Prague gave
February 3, 2022
The basic and always valid principle of industrial cleaning is only one: „the like dissolves and removes the like”, i.e. Non-polar (organic) contamination such as oils
October 29, 2021
An integral part of die casting dies manufacturing process is annealing. Its purpose is to relax stresses, caused both by different types of machining and by
October 2, 2021
Manufacturers of die casting dies should follow certain procedures under Nadca 207 to provide certain guarantees for their service life. In addition, they need a heat
September 13, 2021
In parts I and II, I described the heating phases, the aim of which is to heat up the parts to the austenitization temperature and then
August 3, 2021
In the first part of the heating, we achieved that the inserts are heated to a temperature corresponding approximately to the setup furnace temperature Tp =
July 12, 2021
Correct heating in a vacuum furnace has some drawbacks. Its success depends not only on the heat treater, but also on the tool manufacturer. Therefore, in
June 2, 2021
Sometime more than 20 years ago, I tried to find a model that I could show to the customer, and which could specify exactly why the
May 5, 2021
Case study damage of large tool by hardening process and compensation for damage in court proceeding
Introduction The heat treatment of the shaped insert made of 1.2343 ESU steel was ordered from the commercial heat treatment shop, vacuum hardening and tempering of
May 3, 2021
Almost every day I learn from various sources that someone is selling to someone or someone is buying a new vacuum hardening furnace somewhere. However, information
April 16, 2021
What should such a tempering furnace look like? There are two basic solutions. Retort furnace and non-retort furnace with direct batch heating. Those who want to
April 10, 2021
It is strange how limited one is by one’s view of the world of heat treaters. I went through many stages of this business myself, from