Grindability Of CSS-42L Alloy

CSS-42L steel is the third generation gear steel developed by America in1990s. This steel getsboth the property of wear resistance, which is the most important feature of the first generation steelGCr15, and the property of excellent fracture performance, which is the key property of the secondgeneration steel M50-NiL, in addition, it has a property of good corrosion resistance,high-temperature hardness and surface property improvement through case heat treatment. It hasbroad application prospects for these characteristics above.A knowledge of machinability of a material is the foundation of its engineering applyingafterwards, especially a new material developed for key parts in military field like CSS-42L steel, notonly the physical, chemical and mechanical features, but also the machinability must be clear.In this paper, based on the achievements about grindability of different materials, and variousgrindability research methods of materials, after getting a good knowledge of the physical, chemicaland mechanical features of CSS-42L steel, the grindability of CSS-42L is set as research objective,and the main research work completed are as follows:(1) taking quenched45steel as a comparison base just like in cutting, some grinding experimentsare carried on CSS-42L steel and quenched45steel, using White fused alumina (WA) wheel.Grinding force, force ratio and chip type of these two materials are compared to draw a conclusionabout the grindability of CSS-42L steel.(2) choosing WA wheel and brazed Cubic boron nitride(CBN) wheel, to compare the grindingforce, temperature and specific grinding energy during grinding CSS-42L steel, and the grindability ofCSS-42L steel under various grinding wheel features is gained.(3) selecting creep feed grinding, to study the impact rule of parameters on grinding force,grinding temperature and surface integrity, and grinding parameters are optimized.