The subject of high-temperature alloys encompasses both cast and wrought products that are available from a number of qualified suppliers. The intent of this article is to provide a simplified overview of the basic requirements necessary for selection of alloy systems for use in thermal processing applications running from - 320
Audits of the heat-treating department are a vital part of any good quality program - either as part of a self-assessment or ISO program for a captive shop or, of equal importance, as part of an evaluation of the capabilities of a commercial heat-treat supplier.
When it comes to understanding any subject, and in particular heat treating, having reference material you can trust is invaluable. Over the years we have talked with a number of extremely knowledgeable heat treaters and metallurgists and from these discussions, we have compiled the following list of our "favorites." Newer editions may exist, but exercise caution to ensure their contents are equal to or better than the originals. No heat treat library is complete without them. Let's learn more.
Heat treating of stainless steels depends to a great extent on the type (wrought or cast) and grade of stainless steel, as well as the reason for the treatment, most often to ensure that the properties altered during fabrication are restored (e.g. corrosion resistance, ductility, or hardness) so that the stainless steel component can perform in its intended service environment. There are quite a variety of different heat treatments available. Let's learn more.
Martempering and marquenching are terms often associated with hot oil quenching. Formally, martempering (full martempering, true martempering) is a term applied when an austenitized work piece is quenched into a medium whose temperature is essentially maintained in a bath just above the martensite start (Ms) temperature of the steel and held in that medium until its temperature is uniform throughout - but not long enough to permit bainite (or pearlite) formation - and then allowed to cool in air.
Different combinations of properties can be produced by varying the heat treatment of copper and its alloys-influencing strength, hardness, ductility, conductivity, impact resistance, and inelasticity. Let's learn more.
What is Pressure Quenching? The description most often used to define high pressure gas quenching is "accelerating the rate (speed) of quenching by densification and cooling of gas." One of the many reasons for the intense interest in this quenching technique is related to improved part distortion and higher core hardness.
In the real world, components fail. There are many reasons why. If a premature failure occurs, it is important to evaluate all possible causes and then isolate a root cause that can be corrected to assure that the problem will not reoccur. Let's learn more.
Check out the November 2019 issue of Industrial Heating, featuring the Most-Viewed Vacuum/Surface Treating Articles, "Bringing Machine Learning to Nonmetallic Inclusions in Steelmaking", "The Overlooked Efficiency Opportunity: Intelligent Process Cooling", and much more.