A SUMMARY OF COMPARATIVE PROPERTIES OF AIR-MELTED AND VACUUM-MELTED STEELS AND SUPER-ALLOYS
A compilation of comparative properties of air-melted and vacuum-melted steels and superalloys is presented. The data revealed that: The reduction in hydrogen content of large heats of low-alloy steels effected through vacuum pouring can lead to improved ductility. A reduction in gas, inclusion, and impurity content of low-alloy or chroraium hot-work die steels thrt result from either vacuuminduction melting or consumable-electrode vacuum-arc remelting can lead to improved fatigue and impact properties, higher ductility, and better behavior under multiaxial stresses, but seldom innprove tensile strength. The transition temperatare, rupture strength, and elongation of ferritic and martensitic stainless steels may be improved by vacuum-induction melting. Improved cleanliness, better control of composition and modifications of composition enabled by vacuum-induction melting led to improved stress-rupture, fatigue, and tensile properties in nickel-base superalloys. The tensile and rupture strengths of cobalt-base superalloys are affected but little by vacuum- induction melting, although rupture ductility improved significantly. The improved homogeneity of segregation-sensitive hardenable stainless steels and iron-base superalloys that result from consumableelectrode vacuum-arc remelting leads to innproved tensile strength, ductility, fatigue strength, and stressrupture properties in these alloys. (auth)
- Research Organization:
- Battelle Memorial Inst. Defense Metals Information Center, Columbus, Ohio
- DOE Contract Number:
- AF18(600)-1375
- NSA Number:
- NSA-14-015977
- OSTI ID:
- 4165720
- Report Number(s):
- DMIC-128; PB-151085
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTIVATION ANALYSIS
AIR
BARBITURIC ACID
CHROMIUM ALLOYS
CLEANING
COBALT ALLOYS
CONTROL
DIES
DISTRIBUTION
DRUGS
DUCTILITY
ELECTRODES
FAILURES
FATIGUE
FERRITES
GAMMA SPECTROMETERS
GASES
HOT WORKING
HYDROGEN
IMPACT SHOCK
IMPURITIES
INCLUSIONS
INDUCTION
IRON ALLOYS
IRON OXIDES
MARTENSITE
MELTING
NEUTRONS
NICKEL ALLOYS
PHENOBARBITAL
POROSITY
REDUCTION
SEGREGATION
SENSITIVITY
STAINLESS STEELS
STEELS
STRESSES
SUPERALLOYS
TEMPERING
TENSILE PROPERTIES
THERMODYNAMICS
VACUUM