DURO for cold work - 8 Pages

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Catalogue excerpts

DURO for Cold Work Special Steels for Precise Die and Mold High Toughness Grades High Wear Resistance Grade

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DURO-Created by NACHI’s original technology Steels with superior balance of toughness and wear resistance for precise die and mold • DURO series, special steels for precise die and mold, are high quality and high grade materials which are made by NACHI’s original technology of steel manufacturing and refining. • They have less non-metallic inclusion and segregation that can cause fractures. Also shows superior performance because of great control of carbide quantity and size. : DURO DURO-F1 DURO-F3 Matrix HSS Toughness •DURO for Cold Work has two type grades, High Toughness Grades are DURO-F1,...

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FM ALLOY is DURO is a brand name for NACHI’s newest material products. Made from NACHI’s own technology to be high performance alloys with fine microstructure control. named from the Latin word which means “hard” or “endure”. A description for our tough materials to be used for die and mold. Benefits of DURO • DURO is made by a highly purified procedure, to have high toughness and fatigue strength because of very little non-metallic inclusions. • Quantity and size of carbides in DURO microstructure are controlled to have a superior balance of toughness and wear resistance. Classification Grade...

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Features of DURO-F Series, High Toughness Steels Mechanical Properties High bending fracture strength Superior Charpy impact resistance Charpy Impact Resistance (J/cm2) Bending Fracture Strength (GPa) 6.0 DURO-F1 5.5 DURO-F3 5.0 4.5 DURO-F7 4.0 M2 3.5 D2 3.0 2.5 2.0 56 58 60 62 64 66 68 160 140 120 DURO-F1 100 DURO-F3 80 60 40 M2 D2 DURO-F7 20 0 56 58 60 62 64 66 68 Hardness (HRC) Hardness (HRC) DURO-F Series show high bending fracture strength in hardness range HRC 56-65. DURO-F Series show superior charpy impact resistance in hardness range HRC 56-65. Grindability of DURO-F Series Better grindability...

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Heat Treatment of DURO-F Series Heat treatment condition Grade Requirement Aus. [˚C (˚F)] Temp. [˚C (˚F)] Hardness (HRC) For toughness 1100 (2012) 580 × 2 (1076) 56.0 Standard 1120 (2048) 560 × 2 (1040) 58.0 For wear 1160 (2120) 560 × 2 (1040) 59.5 For toughness 1100 (2012) 580 × 2 (1076) 59.0 Standard 1140 (2084) 580 × 2 (1076) 60.0 For wear 1160 (2120) 560 × 2 (1040) 61.5 For toughness 1120 (2048) 600 × 2 (1112) 60.0 Standard 1120 (2048) 580 × 2 (1076) 62.5 For wear 1180 (2156) 560 × 2 (1040) 65.0 DURO-F1 DURO-F3 DURO-F7 *Thickness of sample: 50 mm, vacuum furnace + pressure gas quenching (about...

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High Wear Resistance Steel Mechanical Properties uperior wear resistance Friction Speed (m/s) Harder Situation OGOSHI's test DURO-Sp shows superior wear resistance compared not only to matrix HSS but inimal loss of strength with rough surface Bending fracture strength Charpy impact resistance DURO-SP shows less surface roughness and strength decreases because of better wear 'Generally strength of materials decreases by notch effect as surface roughness of the materials become worse. DURO-SP shows less charpy impact resistance 'Generally strength of materials decreases by notch effect as surface roughness...

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Heat treatment of DURO-SP (jrftea) treatment condition 'Thickness of sample: 50 mm, vacuum furnace + pressure gas quenching (about 4 bar) 'Hardness may vary depending on material size and method, condition or facilities of heat treatment. • The best heat treatment of DURO-SP differs depending on applications. • For fine blanking around HRC 64 is a standard hardness. • For flow forming mandrel HRC 60-62 is common and for some cold work forming punchs over HRC 67 could be a good choice. Hardness chart DURO-SP can be used in range HRC 60-67. Sample choices of steel grade for applications

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NACHI-FUJIKOSHI CORP. E-mail: webmaster @ nach i-f uj i kosh i .co.jp Tokyo Head Office : Shiodome Sumitomo Bldg. 17F 1-9-2 Higashi-shinbashi, Minato-ku, Tokyo 105-0021, Japan Toyama Head Office: 1-1-1 Fujikoshi-Honmachi, Toyama 930-8511, Japan Tel: +81 -(0)76-423-5111 Fax: +81 -(0)76-493-5211 Overseas Sales Companies • NACHI AMERICA INC. HEADQUARTERS 17500 Twenty-Three Mile Road, Macomb, Michigan, INDIANA BRANCH 715 Pushville Road, Greenwood, Indiana, 46143, WEST COAST BRANCH 12652 E. Alondra Blvd. Cerritos, California, 90703, MIAMI BRANCH - LATIN AMERICA DIV. ATLANTA OFFICE Six Concourse Parkway,...

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