For anyone involved with heat treating of tool steels, it is critical to remember that there is no such thing as acceptable short-cuts in the heat-treatment process. As such, applying best practices for preheating, austenitizing, quenching, deep-freezing and tempering is mandatory. Let’s learn more.
Of the various nonferrous materials in use today, titanium and its alloys have experienced rapid growth for industrial (38%), commercial aerospace (29%) and military aerospace (23%) products. Titanium alloys are used extensively for heavily loaded aerospace components and most recently because of their excellent compatibility with composites. Interest in titanium will continue to grow as military consumption is expected to double in the next 10 years, and commercial aerospace reports that the world fleet will more than double over the next 20 years (Fig. 1). The heat treatment of these alloys is complex and demands an understanding of the end-use application, desired microstructure and process variables. Let’s learn more.
As heat treaters, we are always looking for ways to shorten our processing times. Increasing carburizing temperature has long been known to shorten cycle times, but grain growth has been our Achilles’ heel. Today there is renewed focus on optimization of diffusion-related processes, and certain microalloying elements show promise for allowing us to raise carburizing temperatures. Let’s learn more.
Heat treaters know gears and bearing races are especially prone to dimensional changes during hardening and quenching, which can cause a number of problems during post-heat treatment manufacturing operations.
When we talk in terms of heat treating in vacuum, most people think we do so in a space entirely devoid of matter. In reality, this isn't true. In practical terms then, a vacuum is a space with a highly reduced gas density. Just how many gas molecules are still present and how they react inside the vacuum furnace is something we should better understand. Let's learn more.
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.