In:
IOP Conference Series: Materials Science and Engineering, IOP Publishing, Vol. 547, No. 1 ( 2019-08-01), p. 012039-
Abstract:
In this study, we show the development of the steel matrix composites used for metal die. Matrix used is 40CrMoV5 (ISO standard) steel, which is used as press and die-casting dies. The dispersants used are vapor grown carbon nanofiber (VGCF), which is one of carbon nanofiber (CNF) and titanium die-bride (TiB 2 ) particle powder. After mixing 40CrMoV5 powder and the dispersants by ball milling, the composites was prepared by spark plasma sintering (SPS) process. For VGCF, 1.9 and 3.8 vol. % was added to 40CrMoV5 powder in order to obtain the composites. The thermal conductivity of the VGCF/40CrMoV5 alloy composites improved about 20% compared with the 40CrMoV5 monolithic alloy. The tensile strength of the composites with 1.9 vol. % VGCF is about 1980MPa, which is higher than the monolithic alloy with 1250 MPa. For TiB 2 particle, 4.0, 8.0 20.0 vol. % powders was added to 40CrMoV5 powder. By adding 8.0 vol. % TiB 2 , the thermal conductivity improved about 40% compared with the monolithic alloy, but tensile strength decreased to 612 MPa in 8.0 vol. % VGCF composites, which are caused by the aggregation of TiB 2 powders. It seems the strength of the composites will improve by controlling the dispersibility of TiB 2 powders.
Type of Medium:
Online Resource
ISSN:
1757-8981
,
1757-899X
DOI:
10.1088/1757-899X/547/1/012039
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2019
detail.hit.zdb_id:
2506501-4
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