Microstructure and hardening behavior of Al-modified Fe-1.5 wt%B-0.4 wt%C high-speed steel during heat treatment

Shengqiang Ma; Wenjie Pan; Jiandong Xing; Shaoqiang Guo; Hanguang Fu; Ping Lyu

doi:10.1016/j.matchar.2017.08.001

Microstructure and hardening behavior of Al-modified Fe-1.5 wt%B-0.4 wt%C high-speed steel during heat treatment

Shengqiang Ma
, Wenjie Pan
, Jiandong Xing
, Shaoqiang Guo
, Hanguang Fu
, Ping Lyu

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

The microstructure and age-hardening behavior of a new kind of Al-modified low carbon high boron high-speed steel (BHSS) were investigated. The results show that the as-cast microstructure of BHSS mainly consists of M₂B borides and dendrite martensite. Al addition can promote the formation of pearlite and ferrite. After heat treatment, proper Al addition can not only remarkably increase the bulk hardness of BHSS during destabilized condition, but also promote the subsequent precipitation-hardening effect. The tempered BHSS with 0.6 wt%Al exhibits the best precipitation-hardening behavior at 520 °C tempering, which is attributed to the presence of some dispersive M₂₃(B,C)₆ and M₆(B,C) secondary precipitations. The proper Al can promote the formation of M₇(B,C)₃ and inhibit the coalescence of secondary precipitations. TEM analysis indicates that there exists an orientation relationship of (112)_M23(B,C)6//(112)_M6(B,C) in the steels.

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Materials Characterization
Volume	132
DOIs	https://doi.org/10.1016/j.matchar.2017.08.001
State	Published - Oct 2017

Keywords

Boron high-speed steel
Microstructure
Precipitation
TEM
X-ray diffraction

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10.1016/j.matchar.2017.08.001

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@article{be84adb8f33749d188d4d795f61d7d21,

title = "Microstructure and hardening behavior of Al-modified Fe-1.5 wt\%B-0.4 wt\%C high-speed steel during heat treatment",

abstract = "The microstructure and age-hardening behavior of a new kind of Al-modified low carbon high boron high-speed steel (BHSS) were investigated. The results show that the as-cast microstructure of BHSS mainly consists of M2B borides and dendrite martensite. Al addition can promote the formation of pearlite and ferrite. After heat treatment, proper Al addition can not only remarkably increase the bulk hardness of BHSS during destabilized condition, but also promote the subsequent precipitation-hardening effect. The tempered BHSS with 0.6 wt\%Al exhibits the best precipitation-hardening behavior at 520 °C tempering, which is attributed to the presence of some dispersive M23(B,C)6 and M6(B,C) secondary precipitations. The proper Al can promote the formation of M7(B,C)3 and inhibit the coalescence of secondary precipitations. TEM analysis indicates that there exists an orientation relationship of (112)M23(B,C)6//(112)M6(B,C) in the steels.",

keywords = "Boron high-speed steel, Microstructure, Precipitation, TEM, X-ray diffraction",

author = "Shengqiang Ma and Wenjie Pan and Jiandong Xing and Shaoqiang Guo and Hanguang Fu and Ping Lyu",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = oct,

doi = "10.1016/j.matchar.2017.08.001",

language = "英语",

volume = "132",

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TY - JOUR

T1 - Microstructure and hardening behavior of Al-modified Fe-1.5 wt%B-0.4 wt%C high-speed steel during heat treatment

AU - Ma, Shengqiang

AU - Pan, Wenjie

AU - Xing, Jiandong

AU - Guo, Shaoqiang

AU - Fu, Hanguang

AU - Lyu, Ping

PY - 2017/10

Y1 - 2017/10

N2 - The microstructure and age-hardening behavior of a new kind of Al-modified low carbon high boron high-speed steel (BHSS) were investigated. The results show that the as-cast microstructure of BHSS mainly consists of M2B borides and dendrite martensite. Al addition can promote the formation of pearlite and ferrite. After heat treatment, proper Al addition can not only remarkably increase the bulk hardness of BHSS during destabilized condition, but also promote the subsequent precipitation-hardening effect. The tempered BHSS with 0.6 wt%Al exhibits the best precipitation-hardening behavior at 520 °C tempering, which is attributed to the presence of some dispersive M23(B,C)6 and M6(B,C) secondary precipitations. The proper Al can promote the formation of M7(B,C)3 and inhibit the coalescence of secondary precipitations. TEM analysis indicates that there exists an orientation relationship of (112)M23(B,C)6//(112)M6(B,C) in the steels.

AB - The microstructure and age-hardening behavior of a new kind of Al-modified low carbon high boron high-speed steel (BHSS) were investigated. The results show that the as-cast microstructure of BHSS mainly consists of M2B borides and dendrite martensite. Al addition can promote the formation of pearlite and ferrite. After heat treatment, proper Al addition can not only remarkably increase the bulk hardness of BHSS during destabilized condition, but also promote the subsequent precipitation-hardening effect. The tempered BHSS with 0.6 wt%Al exhibits the best precipitation-hardening behavior at 520 °C tempering, which is attributed to the presence of some dispersive M23(B,C)6 and M6(B,C) secondary precipitations. The proper Al can promote the formation of M7(B,C)3 and inhibit the coalescence of secondary precipitations. TEM analysis indicates that there exists an orientation relationship of (112)M23(B,C)6//(112)M6(B,C) in the steels.

KW - Boron high-speed steel

KW - Microstructure

KW - Precipitation

KW - TEM

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/85026766658

U2 - 10.1016/j.matchar.2017.08.001

DO - 10.1016/j.matchar.2017.08.001

M3 - 文章

AN - SCOPUS:85026766658

SN - 1044-5803

VL - 132

SP - 1

EP - 9

JO - Materials Characterization

JF - Materials Characterization

ER -

Microstructure and hardening behavior of Al-modified Fe-1.5 wt%B-0.4 wt%C high-speed steel during heat treatment

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Keywords

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