The graph shows the results of fatigue testing of standard round bar 316 stainless steel specimens, in tension-compression cycling (R = –1) The symbols represent different sets of specimens, with nontreated specimens identified by triangles, treated specimens by squares.
Continue readingOne Minute Mentor: Time-Temperature-Transformation Diagram
Traditionally, carburization is carried out at high temperature to maximize the solubility and the rate of interstitial solute diffusion.
Continue readingOne Minute Mentor: Variations in Heat-Treating Cycles of PH Stainless Steels
One of the principal advantages of these materials is their versatility.
Continue readingOne Minute Mentor: Heat Treating of Martensitic Stainless Steels
The effect of tempering temperature on hardness and tensile properties of high-alloy steels appears to have the same general form as those of low-alloy steel.
Continue readingChromium Nitride in Duplex Stainless Steels
Because of the use of nitrogen as an alloying element in these stainless steels, chromium nitrides (CrN) may be present on ?/? grain boundaries, on ?/? boundaries, and within the ? grains. If formed in large quantities and under conditions in which the chromium-depleted areas do not have time to repair themselves during annealing, the presence of CrN may adversely affect corrosion resistance.
Continue readingOne Minute Mentor: Precipitation of Intermetallics in Stainless Steels
The exposure of duplex stainless steels to temperatures in the range of 1100 to 1850°F can result in the formation of undesirable intermetallic compounds such as σ and χ phases.
Continue readingOne Minute Mentor: Effects of Different Cooling Rates on Corrosion-Resistant Tool Steels
The graph shows the effects of different cooling rates on the toughness properties (un-notched samples) of AISI 420 and nitrogen-alloyed M333 tool steels.
Continue readingOne Minute Mentor: Secondary Hardening in Tool Steels
As shown schematically in the graph, high-temperature hardness is made possible only by a very important straightening mechanism: secondary hardening, promoted by the precipitation of fine alloy carbides.
Continue readingOne Minute Mentor: Austenitizing Water-Hardening Tool Steels
Austenitizing temperatures for water-hardening tool steels normally vary from 1400 to 1550°F. Higher temperatures are sometimes used for special purposes.
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