scholarly journals Development of heat treatment technology of centrifugally cast rolls with working layer of chromium-nickel-molybdenum cast iron

2016 ◽  
Vol 16 (03) ◽  
pp. 83-89 ◽  
Author(s):  
N.A. Zhizhkina ◽  
◽  
A.N. Medvedev ◽  
Keyword(s):  
Heat Treatment ◽  
Cast Iron ◽  
Treatment Technology ◽  
Centrifugally Cast ◽  
Working Layer ◽  
Heat Treatment Technology

Effects of Vanadium and Rare-Earth on Carbides and Properties of High Chromium Cast Iron

2008 ◽  
Vol 575-578 ◽  
pp. 1414-1419 ◽  
Author(s):  
Wen Min Zhao ◽  
Zhen Xu Liu ◽  
Zi Lai Ju ◽  
Bo Liao ◽  
Xue Guang Chen
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Rare Earth ◽  
Cast Iron ◽  
Treatment Technology ◽  
High Chromium ◽  
Shape Distribution ◽  
High Chromium Cast Iron ◽  
Heat Treatment Technology ◽  
Chromium Cast Iron

The type, shape and distribution of carbide take directly effect on the mechanical properties of high chromium castings. Vanadium is able to stabilize the structure of carbide in high chromium cast iron, meanwhile the hardness of carbide containing vanadium can reaches about 2800HV. In some cases, vanadium can also refine the microstructure. Rare-earth is able to change the shape of carbide in cast iron, refine the grain size of ferrite and improve the mechanical properties of castings. In this experiment, intention of adding vanadium and rare-earth is modification of mechanical properties with the proper heat treatment technology. With the help of SEM, the characteristics of carbide, such as shape, distribution and quantity can be observed and mechanical properties have been improved for better wear-resistance.

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.

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