Heat treatment of cast steel N18K9M5T

1970 ◽  
Vol 12 (7) ◽  
pp. 555-557
Author(s):  
Yu. V. Shakhnazarov ◽  
V. V. Tikhomirov ◽  
V. T. Senchenko ◽  
Yu. B. Sobolev ◽  
N. I. Vorob'eva
Keyword(s):  
Heat Treatment ◽  
Cast Steel ◽  
Steel N18k9m5t

Microstructures and Properties of a Bainite and Martensite Dual-Phase Cast Steel Fabricated by Combination of Alloying and Controlled Cooling Heat Treatment

2005 ◽  
Vol 475-479 ◽  
pp. 93-96 ◽  
Author(s):  
Ye Hua Jiang ◽  
Rong Feng Zhou ◽  
Dehong Lu ◽  
Zhen Hua Li
Keyword(s):  
Heat Treatment ◽  
Cast Steel ◽  
Residual Austenite ◽  
Lower Bainite ◽  
Manganese Steel ◽  
Isothermal Quenching ◽  
Dual Phase ◽  
Controlled Cooling ◽  
Carbide Particles ◽  
Better Than

A bainite/martensite dual-phase cast steel was fabricated by a process of combination of alloying with Si and Mn elements and controlled cooling heat-treatment. Its microstructure was consisted of fine lower bainite with carbide particles precipitated homogeneously, martensite and a little residual austenite. Because of the good match of hardness and impact toughness, its impact wear performance was a little better than that of the isothermal quenching steel, and much better than that of high manganese steel such as Mn13.

scholarly journals Enhancing mechanical properties of a low-carbon microalloyed cast steel by controlled heat treatment

2013 ◽  
Vol 559 ◽  
pp. 427-435 ◽  
Author(s):  
Jingwei Zhao ◽  
Jeong Hun Lee ◽  
Yong Woo Kim ◽  
Zhengyi Jiang ◽  
Chong Soo Lee
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Cast Steel ◽  
Low Carbon ◽  
Carbon Microalloyed

Effect of Different Heat Treatments on Microstructure and Mechanical Properties of the Martensitic Gx12CrMoVNbN9-1 Cast Steel / Wpływ Parametrów Obróbki Cieplnej Na Mikrostrukture I Własciwosci Mechaniczne Martenzytycznego Staliwa Gx12CrMoVNbn9-1

2013 ◽  
Vol 58 (1) ◽  
pp. 25-30 ◽  
Author(s):  
G. Golanski ◽  
J. Słania
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Impact Energy ◽  
Cast Steel ◽  
Lath Martensite ◽  
High Strength ◽  
Strength Properties ◽  
Microstructure And Mechanical Properties ◽  
Quenching And Tempering ◽  
Very High

The paper presents a research on the influence of multistage heat treatment with the assumed parameters of temperature and time on the microstructure and mechanical properties of high-chromium martensitic GX12CrMoVNbN9-1 (GP91) cast steel. In the as-cast state GP91 cast steel was characterized by a microstructure of lath martensite with numerous precipitations of carbides of the M23C6, M3C and NbC type, with its properties higher than the required minimum. Hardening of the examined cast steel contributes to obtaining a microstructure of partly auto-tempered martensite of very high strength properties and impact strength KV on the level of 9-15 J. Quenching and tempering with subsequent stress relief annealing of GP91 cast steel contributed to obtaining the microstructure of high-tempered lath martensite with numerous precipitations of the M23C6 and MX type of diverse size. The microstructure of GP91 cast steel received after heat treatment was characterized by strength properties (yield strength, tensile strength) higher than the required minimum and a very high impact energy KV. It has been proved that GP91 cast steel subject to heat treatment No. 2 as a result of two-time heating above the Ac3 temperature is characterized by the highest impact energy.

scholarly journals Microstructure of Cast High-Manganese Steel Containing Titanium

2016 ◽  
Vol 16 (4) ◽  
pp. 163-168 ◽  
Author(s):  
G. Tęcza ◽  
A. Garbacz-Klempka
Keyword(s):  
Heat Treatment ◽  
Solution Heat Treatment ◽  
Cast Steel ◽  
Mining Industry ◽  
Manganese Steel ◽  
Hadfield Steel ◽  
High Manganese ◽  
High Manganese Steel ◽  
The Matrix ◽  
Titanium Carbides

Abstract Widely used in the power and mining industry, cast Hadfield steel is resistant to wear, but only when operating under impact loads. Components made from this alloy exposed to the effect of abrasion under load-free conditions are known to suffer rapid and premature wear. To increase the abrasion resistance of cast high-manganese steel under the conditions where no dynamic loads are operating, primary titanium carbides are formed in the process of cast steel melting, to obtain in the alloy after solidification and heat treatment, the microstructure composed of very hard primary carbides uniformly distributed in the austenitic matrix of a hardness superior to the hardness of common cast Hadfield steel. Hard titanium carbides ultimately improve the wear resistance of components operating under shear conditions. The measured microhardness of the as-cast matrix in samples tested was observed to increase with the increasing content of titanium and was 380 HV0.02 for the content of 0.4%, 410 HV0.02 for the content of 1.5% and 510 HV0.02 for the content of 2 and 2.5%. After solution heat treatment, the microhardness of the matrix was 460÷480 HV0.02 for melts T2, T3 and T6, and 580 HV0.02 for melt T4, and was higher than the values obtained in common cast Hadfield steel (370 HV0.02 in as-cast state and 340÷370 HV0.02 after solution heat treatment). The measured microhardness of alloyed cementite was 1030÷1270 HV0.02; the microhardness of carbides reached even 2650÷4000 HV0.02.

Study of Influence of Heat Treatment on Cyclic Properties of L21HMF Cast Steel

2016 ◽  
Vol 25 (7) ◽  
pp. 3007-3016
Author(s):  
Stanisław Mroziński ◽  
Grzegorz Golański
Keyword(s):  
Heat Treatment ◽  
Cast Steel

scholarly journals Corrosion Behaviour of Low-Alloyed Cast Steel in Diverse State

2015 ◽  
Vol 15 (1) ◽  
pp. 25-28
Author(s):  
M. Kondracki ◽  
A. Studnicki ◽  
J. Szajnar
Keyword(s):  
Heat Treatment ◽  
Corrosion Test ◽  
High Salinity ◽  
Corrosion Behaviour ◽  
Cast Steel ◽  
Mining Industry ◽  
Cast State ◽  
Alloyed Cast ◽  
Cast Steels ◽  
Parts Manufacturing

Abstract In the paper the results and analysis of corrosion tests were presented for low-alloyed cast steel in as-cast state and after heat treatment operations. Such alloys are applied for heavy loaded parts manufacturing, especially for mining industry. The corrosion test were performed in conditions of high salinity, similar to those occurring during the coal mining. The results have shown, that small changes in chemical composition and the heat treatment influence significantly the corrosion behaviour of studied low-alloyed cast steels.

scholarly journals Manufacturing technologies of steel seamless tubes for production of hard-to-recover hydrocarbons

2018 ◽  
Vol 61 (11) ◽  
pp. 866-875
Author(s):  
A. G. Shiryaev ◽  
S. G. Chetverikov ◽  
S. G. Chikalov ◽  
I. Yu. Pyshmintsev ◽  
P. V. Krylov
Keyword(s):  
Carbon Dioxide ◽  
Heat Treatment ◽  
Low Temperature ◽  
Hot Rolling ◽  
Cast Steel ◽  
High Strength ◽  
Pipe Plant ◽  
Chemical Compositions ◽  
High Hardenability ◽  
Technical Requirements

The review contains main directions in the development of modern steelmaking, hot rolling technologies and heat treatment aimed to follow increased requirements to seamless tubes for production of oil and gas under severe conditions. New targets of PJSC “Gazprom” in development of new resources have determined new technical requirements to pipes for low temperature application, resistant to hydrogen sulfide and carbon dioxide corrosion. Basic metal science approaches are given to develop new chemical compositions of high quality steels containing minimum of sulfur, phosphorous and solute gases. Corresponding heat treatment routes are determined for formation of martensitic microstructure in full wall section during quenching with subsequent high tempering for required combination of high strength and ductility. It was shown that optimal combination of high strength and toughness at 60 °C below zero can be achieved by alloying of chromium-molybdenum steel containing about 0.25 wt. % of carbon with strong carbon forming elements such as vanadium and niobium. Sustainability of these steels to stress sulfide cracking was achieved through grain refinement with microalloying by molybdenum in concentrations corresponding to strength grades that gives high hardenability and retards tempering of martensite. New compositions of corrosion resistant martensitic 13 % chromium steel were carried out that was resulted in required resistance to carbon dioxide environments with improved low temperature toughness and high strength. The authors present results of reconstruction of steel making and hot rolling production lines at JSC “Volzhskii Pipe Plant” providing the required quality of new products from continuously cast steel billets to finished tubes.

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