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isothermal transformation

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Journal Articles
Publisher: Journals Gateway
Alloy Digest (1990) 39 (6): TS-501.
Published: 01 June 1990
... No. 484 tool steel is an air hardening tool steel capable of through hardening in heavy sections. Isothermal transformation of material austenitized at 1750 starts after about 400 seconds at 1300 F and after about 1000 seconds at 600 F. The calculated Ms temperature is 325 F. The steel has a good...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1984) 33 (7): SA-400.
Published: 01 July 1984
... transformation (0 rougher bainitic structures, even at the low cooling rates typical of large forgings. The isothermal-transformation diagram in Figure I illustrates the abilirv of a nickel-molybdenum steel to suppress the pearlite transformaiion in section sizes ranpng from 5 to 80 inches in diameter. Figure I...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (2020) 69 (11): TS-803.
Published: 01 November 2020
... and light reductions. Wait for equalization of the temperature. Do not finish below 900 °C (1650 °F). Cool slowly in the furnace or bury in dry lime or ash. Information on hot forming sourced from Metals Handbook Desk Edition, 2nd ed., ASM International, 1998, p 864. Heat Treatment Isothermal Transformation...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1971) 20 (9): SA-268.
Published: 01 September 1971
... to Brinell 200-220 (Rockwell C 13-18). Qil quenched or isothermally transformed material (700 and 775oF bainites) can be softened to Rockwell C 22-28 by tempering at llOOoF, 1 hour. Carburizing, Hardening and Tempering: Gas carburizing is preferred but pack carburizing can be employed if some spent compound...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1971) 20 (12): SA-270.
Published: 01 December 1971
... 5000 3000 77 800 C FIGURE 1 - ISOTHERMAL TRANSFORMATION DIAGRAM 1400 Ae3 - 1200 loo0 C Mn P 5 Si Ni Cr MO me .17 .28 ,003 .005 .02 9.10 .77 1.00 800 600 F I IO IO2 IO3 IO4 TIME-SECONDS Heat Treatment: Anneal: Heat to 1 l5OoF for 24 hours, air cool. Normalize: 16500F +_ 25oF, 1 br/in., 1 hr minimum, air...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1984) 33 (10): SA-403.
Published: 01 October 1984
.... These compositions suppress the pearlire transformation and promote transformation to tougher bainilicstructures. even at the low coolingrares typical of large forgings. The isothermal-Iransformalion diagram in Figure I illustrares rhe ability; of a nickel-molybdenum steel to suppress the pearlire transformanon...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1985) 34 (1): SA-405.
Published: 01 January 1985
...-1650 F. furnace cool to 156-170 Brine11 hardness. Isothermal Anneal: Heat to 155~16OW F. transform at ll75- 1200°F for 2 hours, air cool to 170 Brinell hardness. DOI: 10.31399/asm.ad.sa0405 Copyright © ASM International® 1996 Carbon, % Fig. Z-Effect of carbon content oncore tensile properties. Direct...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1977) 26 (6): Ni-245.
Published: 01 June 1977
.... Austenite can be prevented from transforming to martensite by isothermally transforming it to bainite at higher temperatures. This results in a crack-free hard-surfaced overlay. (Caution: After using isothermal annealing to prevent cracking, the part must then never be hardened, or cracking will occur...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1978) 27 (6): TS-334.
Published: 01 June 1978
... - Isothermal-transformation diagram. Fig. 1 - Effect of austenitizing and tempering temperatures on hardness. DOI: 10.31399/asm.ad.ts0334 Copyright © ASM International® 1996 Heat Treatment: Annealing: Heat to 850-9OOoC (1560-16500F), cool at approximately 1oOC (200F) per hour to about 7OoOC (12900F), then cool...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1988) 37 (12): TS-494.
Published: 01 December 1988
.../asm.ad.ts0494 Copyright © ASM International® 1996 endothermic atmosphere is used, have dewpoint at +45/ 50 F. In exothermic aunosphere use about 2/4% excess oxygen. The isothermal transformation diagram for SO- LAR alloy is shown in Fig. 1. Put work into furnace or salt bath at the hardening temperature of 1550...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1967) 16 (11): TS-199.
Published: 01 November 1967
.../asm.ad.ts0199 Copyright © ASM International® 1996 Isothermal Transformation Diagram P i'i 7 i" 8, so - seconds - --Mmvm - - HO"" - HRC=Rockw.ll C Hordnes. Heat Treatment: Annealing: Heat at 730-75OT (1345-138oOF) and furnace cool. Hardening: Heat at 1070-115oOC (1960-21OO F), quench in oil or air, and temper...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1997) 46 (5): TS-555.
Published: 01 May 1997
.... mechanicaL and hydraulic forging presses. Imerts and tools have many applications in the production of steel, stainless. aluminum, magnesium forgings, and so forth. Note: An isothermal transformation diagram is available from the plWlllCeh. Products Available: DURODI is furnished in rings. disks. blocks...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1977) 26 (1): TS-312.
Published: 01 January 1977
... AT TRANSFORMATION TEMPERATURE Fig. 3 - Isothermal-transformation diagram. Heat Treatment: Normalizing: If proper precautions are taken in controlling the amount of working, the finishing temperature, and the forging temperature, it is generally not necessary to normalize Carpenter No. 481. However, should...
Journal Articles
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Alloy Digest (1972) 21 (10): SA-281.
Published: 01 October 1972
... by extended heating near the Acm temperature, or by isothermal transformation at 1275oF following austenitizing. Harden: Oil quench from 1500-155OoF, then temper to desired hardness. It is desirable to quench into hot oil (2000F minimum). Machinability: For most machining operations on STROLOY 503-A, a fully...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1967) 16 (7): TS-195.
Published: 01 July 1967
... is recom- mended to avoid retention of ausrenice. (The isothermal transformation diagram shows the delay before transformation begins and reveals the possibility of interrupted quenching treatments. Quench- ing in salt at 500-55OoC (930-102O F) reduces scaling and hardening stresses, and air cooling after...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1985) 34 (11): TS-449.
Published: 01 November 1985
... soft skins. DOI: 10.31399/asm.ad.ts0449 Copyright © ASM International® 1996 m so0 ml 0 @I -m - z - - - =I: SE ara WE 41 TIME - SECONDS Fig. 1 - Isothermal transformation diagram. Table 3 - EFFECT OF TEMPERED HARDNESS ON TENSILE PROPERTIES (Specimens austenitized. quenched and tempered to hardness...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1977) 26 (11): Bi-1.
Published: 01 November 1977
... point, low melting point and the small amount of heat required to keep them in molten condition, fusible alloys are used in autoclaves, tempering and isothermal- transformation baths for small tools and constant-tem- perature equipment. General Characteristics: ASARCOLO 158 and ASARCOLO 255 are bismuth...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1978) 27 (9): TS-338.
Published: 01 September 1978
... = pearlita Austanitizing temparature lZOODo C. ZtW F Fig. 1 - Effect of austenitizing and tempering tempera- tures on hardness. Fig. 2 - Isothermal-transformation diagram. DOI: 10.31399/asm.ad.ts0338 Copyright © ASM International® 1996 Fig. 3 - Carbide distribution in high-speed steels. Left: Conventional...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1966) 15 (2): SA-192.
Published: 01 February 1966
... -OF 60 Heat Treatment: AC, 1340 Ar, 1320 AC, 1415 Ar, 1270 Normalize: Air cool from 1650-1700 deg. F. Anneal: Furnace cool from 1425-1450 deg. F. Spheroidize: Slow cool (about 5 deghr.) follow- ing austenitizing by extended heating at a temperature near the Acm point, or by isothermal transformation...
Journal Articles
Publisher: Journals Gateway
Alloy Digest (1975) 24 (6): SA-316.
Published: 01 June 1975
... - SECONDS Fig. 1 Isothermal-Transformation Diagram. Heat Treatment: Critical Temperatures: The approximate maximum safe rem- pering temperature is 13000F. Ael = 13600F Ae3 = 144oOF Acl = 13900F Ac3 = 147OoF MS= 6900F MgO= 575oF Full Anneal: Heat to 1525 to 16OOoF, furnace cool. Normalize: Heat to 1600...