Newly appearing technical articles

ABSTRACTS OF LITERATURE


The articles listed below are from recent technical journals and may be of interest to members. Copies are available from Margaret O’Malley at IST Headquarters.


O'Malley, M. "Nickel Alloy Springs in Contact with Molten Metals”, SPRINGS, Spring 2014, 53, (2), p 17

It is a widely known fact that certain spring materials come into contact with low melting point molten metals during the course of their manufacture. Molten lead is the medium of choice for the patenting operation of the higher carbon music wire grades, and most pre-galvanized wire is produced by passing the wire through a moltenzinc bath.
However, there will be instances where contact between a spring material and a low melting point molten metal can have dire consequences.

 

DeFord, R. "All Things Springs", Wire Forming Technology International, Spring 2014, p 12

Springs Behaving Badly
Although there are variables in spring calculations, the science typically works out and Engineers know that variations in both machines and material are the culprits when problems arise. However, I did have one favourite experience when I was stumped.

 

Hayes, M. "Technically Speaking", Wire Forming Technology International, Spring 2014, p 18

Stainless Steel
The last column in this series on the microstructure of spring wires covered steels with a tempered martensite structure. The next most commonly used material is spring hard stainless steels. However, first there needs to be an explanation of the various types of stainless steel that are available, and an indication of which ones have an advantageous spring properties.

 

Verhoeve, F. and Vermeersch, V. "Improved Coilability & Corrosion Resistance for Critical Spring Applications", Wire Forming Technology International, Spring 2014, pp 38-39

Two new zinc-aluminum-coated wires were especially designed for critical spring applications. One excels in corrosion and cathodic protection, while the other maintains its coating integrity even under heavy deformation and high stress-relieving temperatures.
Bekaert has been producing wire for spring manufacturers for several decades. By working closely with its customers, the company has become familiar with the challenges and needs in this particular trade. Using these insights in combination with its advanced testing capabilities, Bekaert has the ability to develop new products that can improve the critical properties of springs. The most recent result of these efforts was the creation of an update to Bekaerts’ classic Bezinal® coated spring wires— Bezinal® XP and Bezinal® XC.
 
 
Wright, R. N. "The Strength of Steel", Wire Forming Technology International, Spring 2014, p 45
 
Annealing of Steel – Part 2
We are now underway on a series entitled Annealing of Steel. One-by-one, we will take a look at the process anneal, the spheroidization anneal, the full anneal, the normalizing anneal, the stress-relief anneal and the lowtemperature stress-relief anneal. We will look at the objectives of each type of anneal, the metallurgy and the critical issues of time-temperature tradeoffs. So, let’s get started on process annealing.
 
 
Martin, K. "Self-Healing, Anti-Corrosion Coating for Zinc-Plated & Galvanized Steel", Wire Forming Technology International, Spring 2014, pp 58-59
 
New dense-barrier, nanotechnology-enabled, single-component, clear coating for use in severe environmental and operating conditions
NEI Corporation has recently introduced NANOMYTE ® TC-5001, a nanotechnology-enabled, singlecomponent, clear coating that significantly improves
the corrosion resistance of zinc-plated and hot-dip galvanized (HDG) steel. It is amenable to dipping, brushing and spray coating.
The new coating technology is designed to protect zinc-plated and galvanized steel surfaces from rusting under severe environmental and operating conditions.
 
 
Cammett, J. "Are You Peening Too Much?", The Shot Peener, Summer 2014, 28, (3), pp 10-14
 
Introduction
The title of this article does not refer to the amount of peening business you are doing nor does it represent inquiry into how many parts you are peening by way of manufacturing or repair. Rather, the purpose of this article is to consider the subject of peening coverage and to consider how much coverage should be employed when peening is being done for the most common legitimate purposes including fatigue life and fatigue strength enhancement, stress corrosion resistance, and weight recuction as a result of strength enhancement achieved.
 
 
 

 

comments powered by Disqus