TY - GEN
T1 - Study on high-speed milling of steam turbine blade materials - Differences in cutting characteristics of an unforged ingot and a forged part of stainless steel
AU - Kimura, Tomonori
AU - Sawa, Takekazu
AU - Kamijyo, Tatsuyuki
N1 - Publisher Copyright:
© 2017 Trans Tech Publications, Switzerland.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2017
Y1 - 2017
N2 - Stainless steel is an excellent material that has properties such as heat and corrosion resistance. Thus, stainless steel is used as a material in steam turbine blades. Steam turbine blades are mainly manufactured using two methods. One is the cutting of unforged metal ingots. Another is the cutting of forged parts. Small blades are made by cutting metal ingots. Large blades are made by cutting forged parts. The mechanical characteristics of a metal ingot and a forged part, such as hardness and toughness, are almost the same. There were not researches related to a relationship between "an unforged ingot and a forged part of stainless steel" and "the differences of the tool wear and the finished surface by high-speed milling". In this study, the high-speed milling of stainless steel was attempted for high-efficiency cutting of a steam turbine blade. The differences of the tool wear and the finished surface in the cuttings of an unforged ingot and a forged part were investigated. In the experiment, the cutting tool was a TiAlN coating radius solid end mill made of cemented carbide. The diameter of the end mill was 5 mm, and the corner radius was 0.2 mm. The cutting speed were 100 m/min-600 m/min. The workpieces used were a metal ingot and a forged part of stainless steel. In the results, it was found that the differences of the tool wear and the finished surface in the cuttings of an unforged ingot and a forged part. In the case of the unforged ingot, the flank wear became large with increasing cutting speed. On the other hand, in the case of forged part, the flank wear rapidly increased at a cutting speed of 100 m/min. In addition, the flank wear became smaller than the cutting speed 100 m/min at the cutting speed 200 m/min. Further, the flank wear became large with increasing cutting speed at cutting speeds higher than 200 m/min. That is, the flank wear was at a minimum at a cutting speed of 200 m/min. Although it could not be confirmed the characteristic of high speed milling at an unforged ingot, it has been identified at a forged part.
AB - Stainless steel is an excellent material that has properties such as heat and corrosion resistance. Thus, stainless steel is used as a material in steam turbine blades. Steam turbine blades are mainly manufactured using two methods. One is the cutting of unforged metal ingots. Another is the cutting of forged parts. Small blades are made by cutting metal ingots. Large blades are made by cutting forged parts. The mechanical characteristics of a metal ingot and a forged part, such as hardness and toughness, are almost the same. There were not researches related to a relationship between "an unforged ingot and a forged part of stainless steel" and "the differences of the tool wear and the finished surface by high-speed milling". In this study, the high-speed milling of stainless steel was attempted for high-efficiency cutting of a steam turbine blade. The differences of the tool wear and the finished surface in the cuttings of an unforged ingot and a forged part were investigated. In the experiment, the cutting tool was a TiAlN coating radius solid end mill made of cemented carbide. The diameter of the end mill was 5 mm, and the corner radius was 0.2 mm. The cutting speed were 100 m/min-600 m/min. The workpieces used were a metal ingot and a forged part of stainless steel. In the results, it was found that the differences of the tool wear and the finished surface in the cuttings of an unforged ingot and a forged part. In the case of the unforged ingot, the flank wear became large with increasing cutting speed. On the other hand, in the case of forged part, the flank wear rapidly increased at a cutting speed of 100 m/min. In addition, the flank wear became smaller than the cutting speed 100 m/min at the cutting speed 200 m/min. Further, the flank wear became large with increasing cutting speed at cutting speeds higher than 200 m/min. That is, the flank wear was at a minimum at a cutting speed of 200 m/min. Although it could not be confirmed the characteristic of high speed milling at an unforged ingot, it has been identified at a forged part.
KW - Alloying elements
KW - Forged part
KW - High-speed cutting
KW - High-speed milling
KW - Radius end mill
KW - Stainless steel
KW - Steam turbine blade
KW - Unforged ingot
UR - http://www.scopus.com/inward/record.url?scp=85028699636&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028699636&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/KEM.749.3
DO - 10.4028/www.scientific.net/KEM.749.3
M3 - Conference contribution
AN - SCOPUS:85028699636
SN - 9783035711011
T3 - Key Engineering Materials
SP - 3
EP - 8
BT - Recent Development in Machining, Materials and Mechanical Technologies II - IC3MT 2016
A2 - Fuh, Yiin Kuen
A2 - Yamada, Keiji
PB - Trans Tech Publications Ltd
T2 - 2nd International Conference on Machining, Materials and Mechanical Technologies, IC3MT 2016
Y2 - 7 October 2016 through 11 October 2016
ER -