Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/62142
Title: Microstructure and mechanical properties of hot forging die manufactured by bimetal-layer surfacing technology
Authors: Shen, L
Zhou, J
Ma, X
Lu, XZ
Tu, JW
Shang, X
Gao, F
Zhang, JS
Keywords: Bimetal-layer surfacing
Cast-steel matrix
Hot forging die
Microstructure
Strengthened layer
Transition layer
Issue Date: 2017
Publisher: Elsevier
Source: Journal of materials processing technology, 2017, v. 239, p. 147-159 How to cite?
Journal: Journal of materials processing technology 
Abstract: The temperature field and thermal cycling characteristics of a cast-steel matrix die of automobile crankshaft were predicted. The hot forging die was divided into three temperature regions, i.e., surfacing temperature fluctuation region (0–3 mm in thickness), near surfacing temperature gradient region (3–20 mm in thickness) and matrix temperature balanced region (above 20 mm in thickness), and their temperatures were distributed in high, medium and low-tempered temperature zones respectively. The influences of temperature distribution on the microstructure and mechanical properties of the forging die before and after service were studied. The tempered martensite of strengthened layer decomposed and the coarse grain appeared after service. The protruding part of the ribbed slab was easy to propagate fatigue crack, leading to significant decreasing of tensile strength and impact properties. The tempered martensite and lower banite increased in transition layer, the mechanical properties under high temperatures decreased obviously. The strengthening of hardened structure in weld zone was reduced and the coarse grain structure disappeared, this enabled the performance of the weld zone was more stable than the cast-steel matrix layer and the transition layer.
URI: http://hdl.handle.net/10397/62142
ISSN: 0924-0136
EISSN: 1873-4774
DOI: 10.1016/j.jmatprotec.2016.08.020
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

1
Last Week
0
Last month
Citations as of Nov 8, 2017

WEB OF SCIENCETM
Citations

1
Last Week
0
Last month
Citations as of Nov 17, 2017

Page view(s)

51
Last Week
0
Last month
Checked on Nov 12, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.