June 20, 2011
Stainless steel is favored for many uses because it doesn’t rust and it’s easy to clean. However, for medical environments, copper is making inroads. Copper has been shown to kill six varieties of bacteria, and the EPA has registered more than 350 alloys to have antimicrobial properties.
May 11, 2011
Yield strength and ultimate tensile strength can be used to determine the flow stress curve. First, the tensile test reveals tensile force and elongation, which are used to obtain the stress-strain curve, which reveals yield stress and ultimate tensile strength.
April 6, 2011 | By Professor R. Carlisle "Carl" Smith
Welders do not have to be metallurgy experts, but they do need to be knowledgeable about the chemical, mechanical, and physical properties of different materials.
March 10, 2011 | By Taylan Altan, Ph.D.
CPF has conducted experiments using finite element simulation of the hot stamping process. The process can help manufacturers predict such final part properties as thickness, temperature, and hardness distribution.
June 30, 2010 | By Daniel J. Schaeffler
Challenges faced by stampers in the quest to produce a robust part are magnified when they form high strength steels. As materials increase in strength, the inherent tensile property variability increases. Using products from the family of grades known as the advanced high-strength steels (AHSS) complicate matters even more, since what is supplied from one mill may not be produced in the same way as that from another mill. Understanding how steel is made sets the stage for a more profitable relationship between the steel supplier and the steel consumer. The certified steel properties that come with the coil are useful, but more information about the sheet metal increases the likelihood of success.
March 9, 2010 | By Professor R. Carlisle "Carl" Smith
Is there any such material as plain carbon steel? Is so, what is it, what's its chemical composition, and which applications are best-suited for its use?
March 9, 2010 | By Eren Billur
Stampers use tests to evaluate tool materials and coatings for wear issues. The main tests are scratching tests, twist compression test, strip-reduction tests, and forming tests.
January 9, 2010 | By Eren Billur
Advanced high-strength steels (AHSS) are used extensively in the automotive industry to help improve crash safety and reduce weight. With the increased strength of AHSS, however, come dramatically increased springback and forming load (and, therefore, contact pressure) compared to milder steel grades.
December 1, 2009 | By David Lahrman
During pilgering, the dies endure extreme amounts of stress. Shot peening is a conventional, economic process for hardening the tooling, but its benefits are limited. Supplementing shot peening with laser shock peening where the stress is highest can help to extend the service life of the tools.
April 28, 2009 | By Professor R. Carlisle "Carl" Smith
Cast iron comes in many different types with different properties. Not all can be welded, cut, or machined in the same way, and some types are better suited for specific applications than others. This article discusses the most common types and how to use them.
November 25, 2008 | By Almetals
Aluminum's unique metallurgical properties make it suitable for multiple applications. Aluminum has very high corrosion resistance, Aluminum's specific weight is 2.7 kilogram/dm3 compared to 7.8 kg/dm3 for steel and 8.8 kg/dm3 for copper, and is thermally and electrically conductive.
The use of high-strength steels (HSS) and aluminum in automotive and other stamping manufacturing is creating forming challenges for tool and die engineers. Forming simulation software, formerly used to predict conventional failure causes, now also enables the stamping tool and die engineer to simulate secondary operations, including springback to avoid expensive and time-consuming die tryouts.
March 11, 2008 | By Travis Haynam
Nanofibers--fibers 1,000-times smaller than the diameter of a human hair--can help to improve filtration efficiency, filter cleanability, filter life, and energy consumption when the cartridge filters are used properly.
January 15, 2008 | By Daniel J. Schaeffler
Each metals has its own blend of physical, chemical, and surface properties and characteristics. Knowing about the major work metals (not tool steels), their properties, grades, and characteristics helps to achieve the best results in stamping and forming best results.
January 15, 2008 | By Jeff Heagey
What is duplex stainless steel?Duplex stainless is fast becoming the material of choice when improved corrosion resistance and mechanical properties are required. Through the combined efforts of the steel producers and the filler metal manufacturers, the market is better equipped to use these...