Effect of tempering temperature on microstructure and properties of aluminium‐bearing high boron high speed steel

2020 ◽  
Vol 51 (7) ◽  
pp. 930-937
Author(s):  
Y. Qu ◽  
X. He ◽  
X. Zhang ◽  
H. Fu ◽  
X. Cheng ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Tempering Temperature ◽  
Microstructure And Properties ◽  
High Boron

Effects of modification on microstructure and properties of Al-bearing high-boron high-speed steel

2018 ◽  
Vol 116 (1) ◽  
pp. 108
Author(s):  
Zhang Yaguang ◽  
Hanguang Fu ◽  
Lin Jian ◽  
Wang Changan ◽  
Lei Yongping
Keyword(s):  
Heat Treatment ◽  
High Speed ◽  
High Speed Steel ◽  
High Hardness ◽  
Impact Testing ◽  
Wear Testing ◽  
Microstructure And Properties ◽  
Different Types ◽  
The Matrix ◽  
High Boron

The microstructure of Al-bearing high-boron high speed steel (AB-HSS) contains a large amount of borocarbides, which makes it have high hardness, superior wear resistance and thermal stability. But the borocarbides are coarser and continuously distribute along the grain boundary which seriously destroys the toughness of AB-HSS. In this paper, the microstructure and properties of AB-HSS were regulated by adding modifiers and quenching and tempering heat-treatment. The modifier was RE-Mg, Ti and N elements. The microstructure and properties of AB-HSS were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), the electron probe microanalysis (EPMA), hardness testing, wear testing, and impact testing. The results show that the borocarbides in as-cast AB-HSS are found in intergranular networks showing different degrees of continuity after adding different types of modifiers. The matrix of as-cast AB-HSS all is composed of ferrite, pearlite and martensite, and the borocarbides all consist of M2(B,C) and M7(C,B)3 after adding different types of modifiers. After high-temperature heat treatment, the borocarbides in the microstructure of RE-Mg modification AB-HSS appear as discontinuous networks showing signs of spheroidization and the distribution of the borocarbides is more uniform. The matrix of RE-Mg modification AB-HSS is martensite and the borocarbides consist of M2(B,C), M7(C,B)3 and M23(C,B)6. The hardness of RE-Mg modification AB-HSS reaches 61.7 HRC, and impact toughness increases by 52%, and has excellent comprehensive mechanical properties.

Effect of Quenching Temperature on Microstructure and Properties of Al-Bearing High-Boron High-Speed Steel

2019 ◽  
Vol 72 (12) ◽  
pp. 3107-3116 ◽  
Author(s):  
Xiaoni Liu ◽  
Hanguang Fu ◽  
Yinhu Qu ◽  
Xiaole Cheng ◽  
Changan Wang ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Quenching Temperature ◽  
Microstructure And Properties ◽  
High Boron

Effect of quenching on microstructure and properties of modified Al-bearing high boron high speed steel

2018 ◽  
Vol 60 (6) ◽  
pp. 569-576 ◽  
Author(s):  
Yaguang Zhang ◽  
Hanguang Fu ◽  
Jian Lin ◽  
Yongping Lei ◽  
Shengqiang Ma
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Microstructure And Properties ◽  
High Boron

Effect of Heat Treatment on Microstructure and Properties of High Boron-High Speed Steel

2018 ◽  
Vol 71 (10) ◽  
pp. 2423-2432 ◽  
Author(s):  
Han-guang Fu ◽  
Xiao-ni Liu ◽  
Yong-wei Yang ◽  
Xiao-le Cheng ◽  
Yin-hu Qu
Keyword(s):  
Heat Treatment ◽  
High Speed ◽  
High Speed Steel ◽  
Microstructure And Properties ◽  
High Boron

Microstructure and properties of modified Al-bearing high boron high-speed steel

2019 ◽  
Vol 47 (6) ◽  
pp. 693-703
Author(s):  
Ya-guang Zhang ◽  
Han-guang Fu ◽  
Sheng-qiang Ma ◽  
Jian Lin ◽  
Xing-ye Guo ◽  
...  
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Microstructure And Properties ◽  
High Boron

EFFECT OF Nb ON THE MICROSTRUCTURE AND PROPERTIES OF SPRAY FORMED M3 HIGH SPEED STEEL

2012 ◽  
Vol 48 (8) ◽  
pp. 935 ◽  
Author(s):  
Yipeng YU ◽  
Jinfeng HUANG ◽  
Hua CUI ◽  
Yuanhua CAI ◽  
Jishan ZHANG
Keyword(s):  
High Speed ◽  
High Speed Steel ◽  
Microstructure And Properties

Performance of a Matrix Type High Speed Steel after Deep Cryogenic and Low Tempering Temperature

2021 ◽  
Vol 1016 ◽  
pp. 1423-1429
Author(s):  
Kaweewat Worasaen ◽  
Andreas Stark ◽  
Karuna Tuchinda ◽  
Piyada Suwanpinij
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Cryogenic Treatment ◽  
High Speed Steel ◽  
High Energy ◽  
Single Step ◽  
Deep Cryogenic Treatment ◽  
Tempering Temperature ◽  
Matrix Type ◽  
Bcc Structure

A matrix type high speed steel YXR3 designed for a combination of wear resistance and toughness is investigated for its mechanical properties after hardening by deep cryogenic treatment follow by tempering. The deep cryogenic quenching carried out at -200 °C for 36 hours and the single step tempering results in an obvious improvement in wear resistance while balancing the toughness, comparing with the conventional quenching followed by a double tempering treatment. The quantitative image analysis reveals little difference in the MC carbide size distribution between tempering at different temperatures. The synchrotron high energy XRD confirms the MC type carbide with some evolution in its orientation together with tempered martensite approaching the BCC structure at higher temperatures. In contrary to the conventional quenching and tempering, the lowest tempering temperature at 200 °C yields a moderate drop in hardness with increase in surface toughness proportionally while exhibiting exceptional wear resistance. Such thermal cycle can be recommended for the industry both for the practicality and improved tool life.

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