s60v,CPM440V-钢材资料

0 5 10 15 20 25 30 0 5 10 15 20 25 30 35 40 45 CPM S60V HRC 59 D2 HRC 59 440C HRC 56 CRUCIBLE CPM S60V is a corrosion-resistant, highly wear-resistant tool steel made by the Crucible Particle Metallurgy process. It is essentially 440C martensitic stainless steel enriched with a uniform dispersion of very fine vanadium carbides for exceptionally good wear resistance. CPM S60V offers corrosion resistance equivalent to 440C with substantial improvement in wear resistance over both 440C and D2, and other high chromium tool steels. With characteristics of both stainless steels and tool steels, S60V is ideally suited for corrosion-resistant applications requiring unusually high wear resistance, as well as for high wear applications, requiring corrosion resistance. To the custom knifemaker, CPM S60V offers a corrosion-resistant bladestock with exceptional edge-holding characteristics. Only CPM S90V surpasses S60V in both wear and corrosion properties, but, it should be noted that S60V is easier to grind due to its lower vanadium content. Typical Applications Long-wearing Specialty Cutlery Industrial Knives, Slitters, and Cutters Pelletizing Equipment Wear Components for Food and Chemical Processing Note: These are some typical applications. Your specific application should not be undertaken without independent study and evaluation for suitability. DATA SHEET CRUCIBLE CPM® S60V® (CPM 440V®) Issue #4 Carbon 2.15% Chromium 17.0% Vanadium 5.5% Molybdenum 0.4% HARDNESS(1) IMPACT TOUGHNESS(2) HRC Heat Treatment ft.-lb (Joules) (1) A=Hardened 1850° F (1010° C), double tempered 400°F (205C) B=Hardened 1950° F (1065° C), double tempered 400°F (205°C) C=Hardened 2050° F (1120° C), double tempered 400°F (205° C) D=Hardened 1900° F (1040°C), double tempered 600° F (315° C) E=Hardened 1900° F (1040°C), double tempered 400° F (205° C) F=Hardened 1850° F (1010°C), double tempered 600° F (315° C) (2) Charpy C-notch impact test Crucible... The Tool Steel Pros® Im pa ct T ou gh ne ss ( ft. - l bs .) Mechanical Properties The CPM process results in a finer, more uniform carbide distribution imparting improved toughness and grindability to high alloy steels. The CPM process also allows the design of more highly alloyed grades which cannot be produced by conventional steelmaking. Conventional Steel CPM Steel Physical Properties Elastic Modulus 31X106 psi 215 GPa Density 0.27 lbs/in3 7.4g/cm3 Thermal Conductivity @ 200°F (65°C) 10 BTU/hr-ft-°F 17.3 W/m-°K Coefficient of Thermal Expansion °F °C in/in/°F mm/mm/°C 70-400 20-200 6.1 X 10-6 11.0 X 10-6 70-600 20-315 6.4 X10-6 11.5 X 10-6 70-1100 20-593 6.8 X10-6 12.2 X 10-6 Wear Resistance R el at iv e Va lu es CPM S60V D2 440C HRC 58 HRC 59 HRC 58 Toughness CPM S60V CPM S60V D2 440C 440C HRC 56 HRC 59 HRC 58 HRC 56 HRC 58 (A) (B) (C) (D) (E) (F) (22) (16) (15) (35) (22) (29) CPM S60V ” ” 440C ” D2 16 12 11 26 16 21 56 59 60.5 56 58 59 The CM logo, Crucible, CPM, S60V, Tool Steel Pros, and Crucible Particle Metallurgy are all registered trademarks of Crucible Materials Corporation, Syracuse, NY Corrosion Resistance The corrosion resistance of CPM S60V is generally comparable to that of 440C. High temperature oxidation resistance is some- what lower than 440C. Thermal Treatments Critical Temperature: 1580°F (860°C) Annealing Heat to 1650° F (900° C), hold 2 hours, slow cool at a maximum rate of 25°F (15° C) per hour to 1100° F (595° C), then furnace cool or cool in still air to room temperature Annealed Hardness: Approx. BHN 255/277 Stress Relieving Annealed Parts: Heat to 1100-1300°F (595-705° C), hold 2 hours, then furnace cool or cool in still air. Hardened Parts: Heat to 25-50° F (15-30° C) below original tempering temperature, hold 2 hrs., then furnace cool or cool in still air. Hardening Austenitize: 1850-2050°F (1010-1120°C) Hold time at temperature: 10-30 minutes depending on section size and austenitizing temperature. Lower temperatures require longer soak times. Lower austenitizing temperatures impart greater toughness, higher austenitizing temperatures impart higher wear resistance. Quench: Salt quench, interrupted oil quench, positive pressure gas quench or air cool at a minimum cooling rate of 150°F/min (80°C/min) to below 1000°F (540°C). Cool to below 125° F (50° C) before tempering. For optimum vacuum heat treatment response, a minimum 4 bar gas quench is recommended. Temper: Immediately after tools have cooled to below 125° F (50°C) Double temper at 400-750°F (200-400°C). Hold for a miniumum of 2 hrs. each temper. But tempering above 800°F (425°C) may result in some loss of corrosion resistance. A freezing treatment may be employed between the first and second tempers, if desired. Freezing treatments should always be followed by at least one temper. PLEASE NOTE: Tempering between about 800 and 1000°F (425 and 540°C) is not recommended. All martensitic stainless steels suffer from embrittlement when tempered in this range. Aim Hardness: HRC 56/58 Size Change: +0.02% to +0.05% Size change shown is for a fully martensitic microstructure. The presence of retained austenite may reduce the net growth. When tempering at 400-750°F (200-400°C), freezing treatments may be necessary to minimize retained austenite. Service Center Locations Location Phone Toll Free FAX Auburn, MA 508-832-5353 800-365-1101 508-832-2217 Charlotte, NC 704-372-3073 800-365-1160 704-342-0985 Chicago, IL 630-378-0093 800-365-1151 630-378-1965 Cincinnati, OH 513-771-1310 800-365-1163 513-771-0119 Cleveland, OH 330-562-3131 800-365-1132 330-562-7818 Columbus, OH 614-262-4959 800-365-1131 614-262-7850 Dallas, TX 817-649-2800 800-365-1168 817-633-8142 Detroit, MI 248-528-0332 800-365-1133 248-528-1977 Grand Rapids, MI 616-554-9699 800-365-1137 616-554-9328 Huntsville, AL 256-772-0201 800-365-1161 256-772-3361 Indianapolis, IN 317-638-4501 800-365-1146 317-634-7375 Los Angeles, CA 714-632-1131 800-365-1179 714-632-1181 Location Phone Toll Free FAX Meadville, PA 814-337-8804 800-365-0530 814-337-8808 Milwaukee, WI 262-781-6710 800-242-0948 262-781-6743 Minneapolis, MN 612-331-6320 800-365-1153 612-331-4137 St. Louis, MO 636-272-7220 877-201-4049 636-978-9559 Canada Montreal, QUE 450-443-8060 800-363-8756 450-443-8712 Wallaceburg, ONT 519-627-2245 800-265-5293 519-627-2247 Mexico Monterrey, N.L. (52) 81 8351-7220 (52) 81 8351-2981 Naucalpan, E. de M. (52) 55 5576-4011 (52) 55 5360-1865 CRUCIBLE SERVICE CENTERS DIVISIONAL HEADQUARTERS: Camillus, NY 315-487-0800 800-365-1185 315-487-4028 www.crucibleservice.com email: crucible@crucibleservice.com D330 3/03 ©Crucible Materials Corp Printed in U.S.A.A Division of Crucible Materials Corporation Note: Properties shown throughout this data sheet are typical values. Normal variations in chemistry, size and heat treat conditions may cause deviations from these values. For additional data or metallurgical engineering assistance, consult your local Crucible Service Center. Machinability and Grindability Due to its high vanadium carbide content, the machinability and grindability of S60V will be slightly more difficult than that of D2 or 440C. Similar grinding equipment and practices are acceptable. SG type alumina wheels or CBN wheels have generally given the best performance with the CPM steels. Special Notes to Knifemakers: Hardness: For bladestock, the recommended hardness is HRC 56/58, which is designed to provide an excellent combination of corrosion resistance wear resistance and edge toughness. Because of its high alloy content, CPM S60V will outperform higher hardness conventional grades of bladestock. Heat Treatment: Proper heat treatment is critical to achieve optimum edge holding ability and good toughness. CPM S60V requires higher hardening temperatures than common knife grades and care must be taken to protect the blade’s surface from oxidation during heat treatment. This requires the use of a furnace with atmosphere controls, or simply wrapping the blade with stainless foil wrap. CPM S60V is air hardening, like most high alloy tool steels, but a good fast air cool is recommended to achieve proper hardness. If the blade is wrapped in foil, the foil should be removed immediately following the high heat to avoid any insulating effect. Proper tempering is also highly important. Two draws are recom- mended at a high enough temperature and for sufficient time to relieve stress without degrading corrosion resistance or hardness. Recommended Bladestock Heat Treatment: Austenitize: 2050°F (1120°C), fast air cool. Temper: Double temper at 500°F (260°C) 2 hrs. each, air cooling to room temperature between tempers. Tempering Heat Treat Response (HRC) Temp. 1850 1950 2050 1850 1950 2050 °F (°C) (1010) (1065) (1120) (1010) (1065) (1120) Air Cooled Salt/Oil Quenched As Quenched 54 58 60 56 60 62 400 (205) 52 56 58 54 58 60 500 (260) 52 54 57 53 55 59 600 (315) 51 54 56 52 55 58 700 (370) 51 54 56 52 55 58