Modern heat-treatment technology

1978 ◽  
Vol 20 (7) ◽  
pp. 517-519
Author(s):  
R. P. Shubin
Keyword(s):  
Heat Treatment ◽  
Treatment Technology ◽  
Heat Treatment Technology

Improving in cold resistance of castings made of 20GL type steels

2021 ◽  
pp. 195-202
Author(s):  
A.F. Degtyarev ◽  
V.N. Skorobogatykh ◽  
V.V. Nazaratin ◽  
F.A. Nuraliev ◽  
A.S. Kaftannikov
Keyword(s):  
Heat Treatment ◽  
Impact Strength ◽  
Cold Resistance ◽  
High Impact ◽  
Reliable Operation ◽  
Treatment Technology ◽  
Heat Treatment Technology ◽  
High Impact Strength ◽  
Rational Control ◽  
Chemical And Phase Compositions

The analysis of the literature data on the steels used for the manufacture of castings operating at negative temperatures and the technology of their manufacture is carried out. The effect of chemical and phase compositions on the strength and impact strength characteristics is revealed. The rational technology for manufacturing of these castings is considered. Methods for obtaining of high impact strength of castings made of 20GL type steels at –40...–60 °C temperatures are given. Modification, microalloying and rational modes of heat treatment are used as methods of rational control of the steels structure. The heat treatment technology of castings, which provides the necessary package of properties and reliable operation, is proposed.

Analysis of Material and Heat Treatment of the High-Pressure Fracturing Pump Valves

2011 ◽  
Vol 339 ◽  
pp. 502-505
Author(s):  
Qi Ming Yang ◽  
Li Jie Yang
Keyword(s):  
Heat Treatment ◽  
Wear Resistance ◽  
Working Life ◽  
Nickel Steel ◽  
Treatment Technology ◽  
The Core ◽  
Heat Treatment Technology ◽  
Heat Hardening ◽  
Wear And Tear ◽  
Core Hardness

Fracturing pump valve's failure, except wear and tear factors, and also decided by the scope of it's contact stress, material and heat treatment in technology. Through the analysis of these, some conclusions had been found: The content of remnant austenite would be affected the performance of wear resistance, and the core hardness would be directly affected the working life of it. If the choice of the material and heat treatment technology was not been suitable, and the core intensity was not enough, it could loss the capability of sealing. According to the failure mechanism, used low chrome(nickel) steel, and the heat treatment of carburize+heat hardening+low-temperature tempering was reasonable.

Research on Continuous Cooling Transformation Curve of a C-Si-Mn Steel

2014 ◽  
Vol 556-562 ◽  
pp. 404-407 ◽  
Author(s):  
Zhang Wei Hu ◽  
Guang Xu ◽  
Chen Zhang ◽  
Hai Jiang Hu
Keyword(s):  
Heat Treatment ◽  
Cooling Rate ◽  
Transformation Temperature ◽  
Theoretical Basis ◽  
Treatment Technology ◽  
Heat Treatment Technology ◽  
Cct Curve ◽  
Transformation Curve ◽  
Mn Steel

The CCT curve of a C-Si-Mn steel was investigated. The hot simulation tests at different cooling rates were conducted on Gleeble-1500 simulator and microstructures were observed. Based on transformation temperatures recorded by dilation curves and microstructures, the CCT curve diagram for tested steel was plotted. The effects of cooling rate on microstructure and transformation temperature were studied. The results provide the theoretical basis for determination of hot processing and heat treatment technology of C-Si-Mn steels.

Effect of Heat Treatment Technology on Property of Sodium-Sulfur Battery Cathode Carbon Felt

2013 ◽  
Vol 712-715 ◽  
pp. 337-340
Author(s):  
Yu Zhen Liu ◽  
Bo Zhu ◽  
Yang Chen ◽  
Wei Wei Cao ◽  
Zhi Tao Lin ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Regular Structure ◽  
Element Content ◽  
Carbon Felt ◽  
Treatment Technology ◽  
Element Analysis ◽  
Heat Treatment Technology ◽  
Sulfur Battery ◽  
Sodium Sulfur Battery ◽  
Sodium Sulfur

The heat treatment technology of PAN based carbon felt used for sodium-sulfur battery was studied. The influence of different heat treatment technologies on element content of felt and the microstructure of graphitized felt was investigated by the element analysis, Raman spectroscopy. The relationship between element content and resistivity of felt was discussed. Results showed that the oxidation time was shorter, the oxygen content of the stabilized felt was lower, which resulted in higher carbon content of graphitized felt. Thus the higher degree of graphitization produced the more regular structure and the lower resistivity of the felt.

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