scholarly journals Microstructure evolution and mechanical properties of X12CrMoWVNbN10-1-1 steel during quenching and tempering process

2016 ◽  
Vol 5 (1) ◽  
pp. 45-57 ◽  
Author(s):  
Xingang Tao ◽  
Chuanwei Li ◽  
Lizhan Han ◽  
Jianfeng Gu
Keyword(s):  
Mechanical Properties ◽  
Microstructure Evolution ◽  
Quenching And Tempering ◽  
Tempering Process

Study of Direct Quenching and Tempering Process of a Low Carbon Equivalent 960 MPa Grade Steel

2013 ◽  
Vol 744 ◽  
pp. 329-333
Author(s):  
Feng Lu ◽  
Chao Wang ◽  
Yuan Yuan Li ◽  
Long Lu ◽  
Zhao Dong Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lath Martensite ◽  
Controlled Rolling ◽  
Carbon Equivalent ◽  
Low Carbon ◽  
Tempering Temperature ◽  
Experimental Steel ◽  
Direct Quenching ◽  
Quenching And Tempering ◽  
Tempering Process

The chemical composition of a 960 Mpa grade high strength steel with low carbon equivalent was designed. Effect of direct quenching and tempering process on the microstructure and mechanical properties of the experimental steel was studied. Results showed that fine lath martensite was obtained after controlled rolling and direct quenching. With tempering temperature increasing, the mechanical properties showed different trends for different tempering stages. And this had a direct relationship with the microstructure evolution. The matrix recovery softening, carbon desolution and precipitation of nanomicroalloy carbides influenced the strength change. With increase of tempering time, the strength decreased and toughness improved. Experimental steel tempered at 450 °C for 40min could obtain the best mechanical properties, which meet the requirement with a large impact energy margin.

Microstructure and Mechanical Properties of Low-Si Spring Steels Produced by Quenching- Isothermal-Quenching-Tempering Process

2014 ◽  
Vol 716-717 ◽  
pp. 74-78
Author(s):  
Fei Zhao ◽  
Huan Zhang ◽  
Yi Long Liang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Isothermal Quenching ◽  
Multiphase Structure ◽  
Microstructure And Mechanical Properties ◽  
Spring Steels ◽  
Quenching And Tempering ◽  
Tempering Process

An investigation of low Si spring steels (50CrVA) subjected to quenching-isothermal-quenching-tempering (Q-I-Q-T) process is presented. The results indicated that Q-I-Q-T process lead to the excellent mechanical properties compare to those treated by traditional heat-treatment, quenching and tempering, owing to the multiphase structure. The Q-I-Q-T treated microstructure consists of martensite, retained austensite, bainite and fine distributed carbides.

Heat Treatment of 10Cr12Ni3Mo2VN Blade Steel for Ultra Supercritical Unit

2015 ◽  
Vol 817 ◽  
pp. 472-478
Author(s):  
Jun Ru Li ◽  
Chen Gong ◽  
Le Yu Zhou ◽  
Lie Chen ◽  
Hui Zuo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Impact Toughness ◽  
Strength Properties ◽  
Quenching Temperature ◽  
Tempering Temperature ◽  
The Impact ◽  
Quenching And Tempering ◽  
Blade Steel ◽  
Tempering Process

In this work, the effects of final heat treatment including quenching and tempering process on mechanical properties of 10Cr12Ni3Mo2VN steel were investigated by orthogonal experimental. It is shown that, the quenching process had a small effect on the strength properties. But the impact property obviously decreased with the increase of quenching temperature, that is due to the grain coarsening. It can be found that tempering temperature is the major factor which affects the mechanical properties. Tempering process had a large effect on the precipitation of carbides and that affected the strength, toughness and plastic greatly. The impact toughness had a minimum after tempered at 650°C between 600°C~700°C. The experimental results show that the M23C6 type carbides precipitated at the grain and martensite lath boundary were the main reason which decreased the impact toughness when tempering temperature increased from 600°C to 650°C.

INFLUENCE THE QUENCHING AND TEMPERING ON THE MICROSTRUCTURE, MECHANICAL PROPERTIES AND SURFACE ROUGHNESS, OF MEDIUM CARBON STEEL

2018 ◽  
Vol 18 (1) ◽  
pp. 125-135
Author(s):  
Sattar H A Alfatlawi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Surface Roughness ◽  
Carbon Steel ◽  
Cold Water ◽  
Medium Carbon Steel ◽  
Medium Carbon ◽  
Heating And Cooling ◽  
Treatment Processes ◽  
Quenching And Tempering

One of ways to improve properties of materials without changing the product shape toobtain the desired engineering applications is heating and cooling under effect of controlledsequence of heat treatment. The main aim of this study was to investigate the effect ofheating and cooling on the surface roughness, microstructure and some selected propertiessuch as the hardness and impact strength of Medium Carbon Steel which treated at differenttypes of heat treatment processes. Heat treatment achieved in this work was respectively,heating, quenching and tempering. The specimens were heated to 850°C and left for 45minutes inside the furnace as a holding time at that temperature, then quenching process wasperformed in four types of quenching media (still air, cold water (2°C), oil and polymersolution), respectively. Thereafter, the samples were tempered at 200°C, 400°C, and 600°Cwith one hour as a soaking time for each temperature, then were all cooled by still air. Whenthe heat treatment process was completed, the surface roughness, hardness, impact strengthand microstructure tests were performed. The results showed a change and clearimprovement of surface roughness, mechanical properties and microstructure afterquenching was achieved, as well as the change that took place due to the increasingtoughness and ductility by reducing of brittleness of samples.

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