2022
DOI: 10.1002/srin.202200232
|View full text |Cite
|
Sign up to set email alerts
|

Microstructure and Mechanical Properties of a Novel Ultra‐High Strength Hot‐Stamped Steel with High Hardenability

Abstract: Herein, it is shown that the hot‐stamped steel exhibits high hardenability with a critical cooling rate of about 0.7 °C s−1 due to its unique chemical composition. The microstructure of the annealed sheet consists of ferrite, spherical carbides, and intergranular martensite. Thereinto, the generation of intergranular martensite can eliminate the yield point elongation and reduce the ratio of yield strength to ultimate tensile strength. Furthermore, compared with commercial 30MnB5 steel, the experimental steel … Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1

Citation Types

0
5
0

Year Published

2023
2023
2024
2024

Publication Types

Select...
5

Relationship

0
5

Authors

Journals

citations
Cited by 7 publications
(5 citation statements)
references
References 39 publications
0
5
0
Order By: Relevance
“…However, due to its large size and incoherent relationship with the matrix, it cannot play a vital role in precipitation strengthening by cutting and bypassing precipitated particles. [ 22 ] b) The second category involves the formation of original M 7 C 3 carbides during heating and cooling or in annealed sheets. Stacking faults were observed from the M 7 C 3 carbide, which were formed during the carbide growth stage or the subsequent cooling process.…”
Section: Resultsmentioning
confidence: 99%
See 3 more Smart Citations
“…However, due to its large size and incoherent relationship with the matrix, it cannot play a vital role in precipitation strengthening by cutting and bypassing precipitated particles. [ 22 ] b) The second category involves the formation of original M 7 C 3 carbides during heating and cooling or in annealed sheets. Stacking faults were observed from the M 7 C 3 carbide, which were formed during the carbide growth stage or the subsequent cooling process.…”
Section: Resultsmentioning
confidence: 99%
“…Therefore, it was crucial to optimize chemical composition to guarantee the strength and improve the ductility. [ 22,23 ]…”
Section: Introductionmentioning
confidence: 99%
See 2 more Smart Citations
“…[ 14 ] The addition of 1.99 wt% Cr content remarkably increased the hardenability, and B was no longer needed. The critical cooling rate of austenite to martensite is 0.7 °C s −1 , [ 15 ] which ensures that full martensite microstructure can be easily obtained even at relatively low cooling rates. In this study, the ingots were homogenized at 1200 °C for 1 h, followed by hot rolling to sheets with a thickness reduction of about 91%.…”
Section: Methodsmentioning
confidence: 99%