Heat Treatment of Heat-Resistant Ferrous Cast Alloys

2015 ◽  
Vol 9 (2) ◽  
pp. 7-20 ◽  
Author(s):  
Delin Li ◽  
Clayton Sloss
Keyword(s):  
Heat Treatment ◽  
Heat Resistant ◽  
Cast Alloys

Surface conditions of Nitinol wires, tubing, and as-cast alloys. The effect of chemical etching, aging in boiling water, and heat treatment

2003 ◽  
Vol 65B (1) ◽  
pp. 193-203 ◽  
Author(s):  
S. A. Shabalovskaya ◽  
J. Anderegg ◽  
F. Laab ◽  
P. A. Thiel ◽  
G. Rondelli
Keyword(s):  
Heat Treatment ◽  
Chemical Etching ◽  
Boiling Water ◽  
Surface Conditions ◽  
Cast Alloys

scholarly journals The development of low-temperature heat-treatable high-pressure die-cast Al–Mg–Fe–Mn alloys with Zn

2021 ◽  
Author(s):  
Xiangzhen Zhu ◽  
Fuchu Liu ◽  
Shihao Wang ◽  
Shouxun Ji
Keyword(s):  
Heat Treatment ◽  
Low Temperature ◽  
Mechanical Test ◽  
Equilibrium Phase ◽  
Solution Temperature ◽  
Tem Analysis ◽  
Die Cast ◽  
Zn Concentration ◽  
Temperature Heat ◽  
Cast Alloys

AbstractIn the present work, a novel low-temperature heat-treatable recycled die-cast Al–Mg alloy was developed by adding Zn into non-heat-treatable Al–5Mg–1.5Fe–0.5Mn alloy. The results showed that Zn additions resulted in the formation of equilibrium phase T-Mg32(Al, Zn)49 under as-cast condition, which can be dissolved into the α-Al matrix at a relatively low solution temperature (430 °C) and thus set the base for the low-temperature heat treatment. The mechanical test results indicated that Zn additions had a smooth liner improvement in the strength of all as-cast alloys and T6-state alloys with 1% and 2% Zn as its concentration increased but resulted in a sharp improvement on the strength of T6-state alloy when Zn concentration increased from 2 to 3%. TEM analysis revealed that the precipitate in T6-state Al–5Mg–1.5Fe–0.5Mn–3Zn alloy is η′ phase, rather than the widely reported T″ or T′ phase in other Al–Mg–Zn alloys with approximately same Mg and Zn concentrations. After the optimized low-temperature T6 heat treatment (solution at 430 °C for 60 min and ageing at 120 °C for 16 h), the Al–5Mg–1.5Fe–0.5Mn–3Zn alloy exhibits the yield strength of 321 MPa, ultimate tensile strength of 445 MPa and elongation of 6.2%.

scholarly journals Influence of Heat Treatment on Formation Behavior of Boron Nitride Inclusions in P122 Heat Resistant Steel

2006 ◽  
Vol 46 (11) ◽  
pp. 1712-1719 ◽  
Author(s):  
Kazuyuki Sakuraya ◽  
Hirokazu Okada ◽  
Fujio Abe
Keyword(s):  
Heat Treatment ◽  
Boron Nitride ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Formation Behavior

scholarly journals HEAT-RESISTANT COMPOSITIONS BASED ON WASTE OF ENTERPRISES OF CERAMIC INDUSTRY

2018 ◽  
Vol 8 (4) ◽  
pp. 56-60
Author(s):  
A. I. KHLYSTOV ◽  
D. I. ISAEV ◽  
D. A. PODGORNAYA
Keyword(s):  
Heat Treatment ◽  
Residual Strength ◽  
Ceramic Industry ◽  
Orthophosphoric Acid ◽  
Phosphate Binders ◽  
Critical Temperatures ◽  
Heat Resistant ◽  
Clay Component

The article presents various methods of synthesizing heat-resistant binders based on large-tonnage wastes of the ceramic industry. The use of expanded clay dust in the compositions of heat-resistant concrete on portlandcement allowed to increase their residual strength in the zone of critical temperatures (800-1000 ° C). It was revealed and justifi ed that the use of phosphate binders for synthesizing a binder made it possible to increase the refractoriness of the heat-resistant composition based on expanded clay dust to 1300-1350 с. As the experiments show, claydite dust in its composition contains a clay component, which ensures the plasticity of the ramming mass. It was established that samples of ramming mass on orthophosphoric acid did not require heat treatment and can be immediately removed.

Effect of Preferential Heat Treatment on Microstructure of New Martensitic Heat Resistant Steel G 115

2015 ◽  
pp. 137-143
Author(s):  
Peng Yan ◽  
Zhengdong Liu ◽  
Yuqing Weng
Keyword(s):  
Heat Treatment ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant

Effect of Heat Treatment on Microstructure and Mechanical Behavior of a Welded Joint from Heat Resistant Steel SA-335 P5

2021 ◽  
Author(s):  
Donghui Guo ◽  
Zhentai Zheng ◽  
Jinling Yu ◽  
Meng He ◽  
Fen Shi ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Mechanical Behavior ◽  
Welded Joint ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant

Heat Resistance of Escherichia coli in Cow and Buffalo Milk

1980 ◽  
Vol 43 (5) ◽  
pp. 376-380 ◽  
Author(s):  
R. S. SINGH ◽  
B. RANGANATHAN
Keyword(s):  
Escherichia Coli ◽  
Heat Treatment ◽  
Heat Resistance ◽  
Skim Milk ◽  
Buffalo Milk ◽  
Time Interval ◽  
E Coli ◽  
Heat Resistant ◽  
Whole Milk

Three Escherichia coli cultures (0111:B4, 0127:B8 and NP) were selected to study their heat-resistant characteristics when in cow skim, cow whole and buffalo whole milk. The temperatures of heat-treatment included in this study were 50, 55, 60 and 63 C. The time interval during heat-treatment was 10 min at 50 and 55 C and 5 min at 60 and 63 C. Marked differences in heat-resistance were observed in the three E. coli cultures. The z-values obtained for strain 0111:B4 were 8.3, 9.0 and 10.2 when tested in cow skim milk, cow whole milk and buffalo milk, respectively. The z-values for 0127:B8 and NP were 17.5, 18.0 and 19.2 and 18.8, 19.0 and 20.3, respectively, for the three types of milk.

Effect of Preferential Heat Treatment on Microstructure of New Martensitic Heat Resistant Steel G115

2014 ◽  
pp. 137-143 ◽  
Author(s):  
Peng Yan ◽  
Zhengdong Liu ◽  
Yuqing Weng
Keyword(s):  
Heat Treatment ◽  
Resistant Steel ◽  
Heat Resistant Steel ◽  
Heat Resistant

Effect of Ausforming on Creep Strength of G91 Heat-Resistant Steel

2018 ◽  
Vol 941 ◽  
pp. 400-406 ◽  
Author(s):  
Javier Vivas ◽  
Rosalia Rementeria ◽  
Marta Serrano ◽  
Eberhard Altstadt ◽  
David San Martín ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Creep Strength ◽  
Operating Temperature ◽  
Strengthening Mechanism ◽  
Processing Route ◽  
Resistant Steel ◽  
Creep Tests ◽  
Heat Resistant Steel ◽  
Heat Resistant ◽  
Conventional Heat Treatment

The major challenge in a heat-resistant steel is to generate thermally stable microstructures that allow increasing the operating temperature, which will improve the thermal efficiency of the power plant without diminishing strength or time to rupture. The strengthening mechanism in tempered martensitic 9Cr steels comes mainly from the combination of solid solution effect and of precipitation hardening by fine MX carbo-nitrides, which enhance the sub-boundary hardening. This work is focused on the effect of ausforming processing on MX nanoprecipitation, on both their distribution and number density, during the subsequent tempering heat treatment. The creep strength at 700 oC was evaluated by small punch creep tests. The creep results after ausforming were compared to those obtained after conventional heat treatment concluding, in general, that ausforming boosts the creep strength of the steel at 700 oC. Therefore, conventional ausforming thermomechanical treatment is a promising processing route to raise the operating temperature of 9Cr heat-resistant steels.

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