MACHINING CHARACTERISTICS OF HIGH STRENGTH THERMAL RESISTANT MATERIALS. United States Air Force Machinability Report, 1960. Volume 4. Final Technical Engineering Report for December 22, 1958 to December 18, 1959
Technical Report
·
OSTI ID:4098158
A study of the machining characteristics in turning, milling, drilling, and tapping was conducted on 25 highstrength thermal-resistant alloys. Relations are presented between tool life, cutting speed, feed, tool geometry, tool material, and cutting fluids. Alloys studied were of the following classes: mantensitic low-alloy steels; hot-work die steels; austenitic, martensitic, and precipitationhardening stainless steels; nickel-base and cobalt-base high- temprrature alloys; and titanium alloys. The effects of grinding conditions are indicated with respect to their influence on wheel wear and surface finish for six typical high-strength thermal-resistant alloys: AM-350, 410 Stainless, A-286, Inconel 700, Udimet 500, and HS-25. Also the effect of grinding and milling variables on workpiece distontion and residual stress on ground and milled surfaces was determined on AISI 4340, AMS 6304, and Titanium (6A1-4V). Metal removal rates were over 35 times lower and tool life 100 times lower in milling 52 Rc hardness 4340 ultra-high-strength steel, as compared to milling aluminum. Grinding wheel speeds of approximately 6000 ft/min were required for reasonable grinding ratio (for minimum wheel wear); whereas speeds of about 2000 ft/min were necessary for minimum distortion and residual stresses in the workpiece. Increased requirements are described for precise control of rigidity, speeds, feeds, and tool geometry for machine tools to machine the highstrength thermal- resistant alloys. (auth)
- Research Organization:
- Curtiss-Wright Corp. Wright Aeronautical Div., Wood-Ridge, N.J.
- NSA Number:
- NSA-15-009394
- OSTI ID:
- 4098158
- Report Number(s):
- AMC TR 60-7-532
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALLOY-A-286
ALLOY-HS-25
ALLOYS
ALUMINUM ALLOYS
AUSTENITE
CHROMIUM ALLOYS
COBALT ALLOYS
CONFIGURATION
CONTROL
COOLING
DEFORMATION
HEAT RESISTING METALS
INCONEL ALLOYS
IRON ALLOYS
LUBRICATION
MACHINING
MARTENSITE
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
STRESSES
TITANIUM ALLOYS
TOOLS
TUNGSTEN ALLOYS
UDIMET
VELOCITY
ALLOY-HS-25
ALLOYS
ALUMINUM ALLOYS
AUSTENITE
CHROMIUM ALLOYS
COBALT ALLOYS
CONFIGURATION
CONTROL
COOLING
DEFORMATION
HEAT RESISTING METALS
INCONEL ALLOYS
IRON ALLOYS
LUBRICATION
MACHINING
MARTENSITE
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
STAINLESS STEELS
STEELS
STRESSES
TITANIUM ALLOYS
TOOLS
TUNGSTEN ALLOYS
UDIMET
VELOCITY