\n\tHigh-temperature nitriding or solution nitriding at temperatures of 2010 \u00b1 90\u00b0F is a new treatment available to produce cases with nitrogen concentrations in the range of 0.4 to 0.9 wt%, which is low compared to plasma nitriding treatments at low temperature (up to 16.9wt% N), but the resulting case is up to 100 times deeper (2 mm, or 0.08 in.). The lower nitrogen concentration implies a lower surface hardness (360 HV for solution nitriding of austenitic steels).<\/p>\n
\n\tThe graph shows a time-temperature transformation (TTT) curve for the precipitation of Cr2<\/sub>N, from which it can be estimated that, to avoid CrN precipitation, the temperature must drop from 2010\u00b0F to below 1650\u00b0F in approximately 20 seconds. That is feasible only in relatively thin parts (large area\/volume ratio) that cool sufficiently to cope with the TTT curve time limitations to avoid precipitates, and only for a small number of parts at a time.<\/p>\n \n\tVolume 4D, Heat Treating of Irons and Steels<\/em> ? Heat Treated High-Alloy Steels ? Nitriding of Stainless Steels ? Thermochemical Nitriding Treatments<\/p>\n","protected":false},"excerpt":{"rendered":" High-temperature nitriding or solution nitriding at temperatures of 2010 \u00b1 90\u00b0F is a new treatment available to produce cases with nitrogen concentrations in the range of 0.4 to 0.9 wt%, which is low compared to plasma nitriding treatments at low temperature (up to 16.9wt% N), but the resulting case is up to 100 times deeper (2 mm, or 0.08 in.).<\/p>\n","protected":false},"author":63082,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[439,440,441,492,482,474,493,499,1],"tags":[],"class_list":["post-8622","post","type-post","status-publish","format-standard","hentry","category-general","category-news","category-news-articles","category-nitriding-and-nitrocarburizing","category-problems-and-troubleshooting","category-steels","category-surface-hardening","category-time-temperature-diagrams","category-uncategorized"],"yoast_head":"\n