Microstructure of Tool Steel X37CrMoV5 after Cryogenic Treatment and its Effect on Wear Resistance

Abstract

<p>A deep cryogenic heat treatment (DCT) was applied to X37CrMoV5 steel, which included soaking at -160°C for 12 and 30 hours followed by tempering at 180°C. Microstructures were compared with those after conventional heat treatment (HT). Microstructures with conspicuous dendritic segregation were observed in all specimens. After HT coarser and finer tempered martensite occurred in depleted and enriched areas of carbon and alloying elements respectively. Coarse molybdenum and vanadium carbides, fine secondary Fe2MoC carbides and retained austenite were identified after HT. Deep freezing resulted in microstructure refinement, transformation of retained austenite into twinned martensite, spinodal decomposition of martensite plates and precipitation of semicoherent h-carbide. The mechanism of h-carbide precipitation was discussed. Wear rate was measured using pin-on-disc test. The best results were obtained after DCT with cryosoaking for 12 hours.</p>

An Extensive Review on the Effects of Deep Cryogenic Treatment on Cutting Tools

“…Jandová et al [62] investigated the impact of a deep cryogenic treatment on the wear resistance and microstructure of the X37CrMoV5-1 (H11) hot-work steel. The wear resistance was measured at 400 °C using the pinon-disc method with a rotary tribometer.…”

“…Therefore depending upon the load conditions, cryogenic treatment should carry out or not. In [62] Jandová et al investigated procedure and the results of exploring the impact of a deep cryogenic treatment on the wear resistance and micro structure of the X37CrMoV5-1. Ather and Sonawane [63] revealed the enhancement of wear resistance of AISI D3 Tool Steel by Cryogenic Treatment.…”

“…[26], LN2 cooling but by using the tool AISI 304, [25], and performance of milling in hardened AISI D3 tool steel using TiN-coated carbide inserts [27], enhancement of wear resistance of AISI D3 Tool Steel [63], and Micro-structure and Hardness [61] evaluated about, after Cryogenic treatment comparison is also made with untreated test specimen. Moreover, concentrates additionally analyzed the Further studies negative side of cryo innovation for a situation study, where solidified bearing steel (AISI 52100) was ground by an alumina wheel with chilled N2 in both gas and fluid (LN2) [20] while few researched strategy and the aftereffects of investigating the effect of a profound cryogenic treatment on the wear resistance and microstructure of the X37CrMoV5-1 [62]. From the review, it is found that cryogenic is applied to wear resistant, titanium, stainless steel and for metallurgical analysis.…”

Effect of Cyclic Cryogenic Treatment on Wear Resistance, Impact Toughness, and Microstructure of 42CrMo Steel and Its Optimization

“…Cryogenic treatment (CT), also called cryogenic processing, is generally regarded to be supplementary to conventional heat treatment [3], which is performed after quenching and usually before tempering or sometimes after tempering [4]. e purpose of applying cryogenic treatment is to improve some mechanical properties of materials by changing microstructure so as to enhance service performance or extend the service life of tools or parts [5].…”

Gas Nitriding With Deep Cryogenic Treatment of High-Speed Steel

“…In this case, deep cryogenic treatment promotes grain refinement and precipitation of fine carbonitrides that contain the alloying elements. Generally, the purpose of DCT is to reduce the amount of retained austenite, to improve the matrix hardness (or surface hardness in thermochemical treatment), to stabilise martensite for dimensional and geometric stability of the part and, last but not least, to improve wear resistance [12][13][14][15][16].…”