Allocating space for case hardening furnaces
When selecting neutral or case hardening furnaces that require pits and have vertically mounted radiant tubes, facility managers must make sure that the equipment...
Cleaning for heat treatment – Part II
Second in a series » Among the many specifications applied to finished heat-treated goods, the cleanliness of those goods is increasingly important in appearance, performance, and...
Sintering metal powders
In this column, I will discuss the process of sintering metal powders, an important part of manufacturing powder metallurgy (PM) parts.
Introduction
Powder metallurgy is a...
Ring rolling – An interesting forging practice
Rolled-ring forging is a specialized forging process used to create seamless rings of different sizes and profiles. These forgings are widely used in aerospace,...
The effect of catalysts on quench oil oxidation
In the last column, I discussed the effect of temperature on the oxidation of a quench oil. As was alluded to in my last...
Cleaning for heat treatment – Part IV
Fourth in a series » Among the many specifications applied to finished heat-treated goods, the cleanliness of those goods is increasingly important in appearance, performance, and...
Cleaning for heat treatment — Part III
Third in a series » Among the many specifications applied to finished heat-treated goods, the cleanliness of those goods is increasingly important in appearance, performance, and...
Delta ferrite formation in fasteners
During the manufacture of fasteners, the formation of iron phosphide as delta ferrite can occur during heat treatment. This can have a deleterious effect...
Cleaning for heat treatment – Part V
Fifth in a series » Among the many specifications applied to finished heat-treated goods, the cleanliness of those goods is increasingly important in appearance, performance, and...
Transformation of austenite to pearlite
In this column, I will discuss the different types of precipitation hardening stainless steels and discuss their physical metallurgy.
Pearlite was named by Henry Howe...
Transformation of bainite from austenite
In this column, I will discuss the transformation of bainite from austenite.
Introduction
During the late 1920s, during studies of isothermal transformation of austenite —...
Widmanstätten ferrite
In this column, I will discuss the formation of Widmanstätten ferrite from austenite in steel. This microstructure has a unique appearance and shares some...
