High-chromium Cast Ball Heat Treatment Process Research mainly talks about the quenching and tempering effect on the cast ball.
Oct 24, 2017· ADVERTISEMENTS: These cast irons have high abrasion-resistance, and can be readily cast in shapes required in machinery used for crushing and grinding, etc. Abrasion-resistance increases with the increase of hardness due to the increase of the volume of the eutectic carbides (alloy eutectic carbides are much harder than iron carbide). The must element chromium prevents
Nickel-chromium white iron castings are given a stress-relief heat treatment because, properly made, they have a martensitic matrix structure, as-cast. Tempering is performed between 205 to 260°C (400 to 450°F) for at least 4 h.
Jan 01, 2004· Four heat treatment schedules were applied to 14.6 wt pct Cr-2.2 wt pct Mn-1 wt pct Ni cast iron to improve its machinability: (a) one-step continuous annealing [holding at 1123 K (950 °C), 2
Apr 29, 2014· The influence of heat treatment on microstructure and mechanical properties of high chromium white cast iron alloyed with titanium was investigated. The austenitizing temperatures of 980°C and 1150°C for 1 hour each followed by tempering at 260°C for 2 hours have been performed and the effect of these treatments on wear resistance/impact toughness combination is reported.
The microstructure of high chromium white cast iron grinding ball as-cast and after heat treatment was observed by metallographic microscope. The sample of 10mm* 10 mm* 8 mm in size at the center of the grinding ball was cut by weld and polished with 200 # to 1500 # metallographic sand.
Jun 05, 2008· Microstructural Modiﬁcations of As-Cast High-Chromium White Iron by Heat Treatment A.E. Karantzalis, A. Lekatou, and H. Mavros (Submitted June 5, 2008) The initial as-cast microstructure of a high-chromium (2.35% C, 18.23% Cr) white cast iron consisting of primary austenitic dendrites and a eutectic mixture of M 7C
Special High Chrome Oil Quenching Casting Iron Ball Cr:20-30 For Ball Mill Grinding . THE PROCESS LINE OF PRODUCTION: raw materilals----scientific proportioning----electric furnaxe smelting----assay before furnace----mould forming----polishing----Heat treament----Dimension test----Hardness test----Packing----Transportation----Sea freightWe are one of the largest factory specialized in
High chromium irons are essen-tially based on the iron –chromium carbon ternary diagram, and in the as-cast condition, they consist of hard eutectic (Fe,Cr) 7 C 3 carbides held in an
Wear resistance of high Cr white cast irons can be improved by means of heat treatment. This type of cast iron alloy may present a microstructure with retained austenite. The amount of retained austenite changes with the applied heat treatment, which will have an influence on wear properties.
Cr20 high Cr white cast iron refiner plates were prepared.Their hardness of the Cr20 cast iron samples was tested through an orthogonal test.The results show that among the test parameters,the most important one is tempering temperature,the second is heating hold time,next is austenitizing temperature and the last is tempering time.The hardness of the all tested samples is over 57.5 HRC.The
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Group and confirms a better heat treating technology of high-Cr cast iron to lengthen the Read more. Abrasive Erosion Comparison for a Ceramics and a High Chrome High-Performance Ceramics V: Abrasive Erosion Comparison for a Ceramics and a High Chrome Cast Iron Applied in a Slurry Pump.