When we deal with applications where strength-to-weight ratio is a critical consideration, we often turn to solutions involving the so-called “light metals.” Aluminum, magnesium, titanium and in some cases beryllium enhance engineering performance while minimizing the weight of components and structures. Most of us involved in heat treating these materials know how we do it, but it is equally important to understand why we do it. Let’s learn more.
As heat treaters, one of our New Year’s resolutions should be to clean up our act! Cleaning parts before and after heat treatment is a critical part of what we do. Most of us feel we clean parts “good enough” and feel we know what cleaning is, but few actually do. Let’s learn more.
Vacuum pumps have been called the heart of a vacuum system. Let’s look at how we can reach low vacuum levels using diffusion pumps. And we need to know how all pumps should be maintained to keep the vacuum system running trouble free. Let’s learn more.
In order to create a vacuum within a closed container, or vessel, we need to remove the molecules of air and other gases that reside inside by means of a pump. The vacuum vessel and pumps (mechanical, booster, diffusion, holding) together with the associated piping manifolds valves, gages and traps comprise a typical vacuum system. Let’s learn more.
Heat treating, while perhaps not the most significant cost element in the manufacture of fasteners (Fig. 1), is critical to achieving proper quality and performance. As heat treaters we are often faced with high volumes and tight margins. Let’s learn more.
One additional factor – performance over time – should be added to the list since we are always looking for ways to extend the life of our quenchants without sacrificing their performance. Let’s learn more.
Cooling curves, cooling-rate curves and oil analyses are provided by suppliers to help heat treaters better control an important process variable – quenching. Unfortunately, in many cases these reports are not well understood or, worse yet, filed to be used merely as ISO documents.
Tempering, also known as “drawing,” is one of the most common heat-treatment processes – and one that is all too often taken for granted. We all know it’s important, yet we spend little time focused either on the process or on the equipment in which it is performed. Let’s learn more.
Once we’ve heated a piece of steel to elevated temperature, it must be cooled in order to complete its transformation into a useful engineering material. Understanding cooling transformations is another important responsibility of the heat treater. Let’s learn more.
Check out the October 2019 issue of Industrial Heating, featuring the "High-Temperature Refractory Maintenance", "How to Tell if You Really Have an Abrasion Problem", "Direct-Fired Gas Burners for High-Temperature Applications", and much more.