TY - JOUR
T1 - Surface integrity of hot work tool steel after high-speed milling - experimental data and empirical models
AU - Axinte, Dragos
AU - Dewes, Richard
PY - 2002/10/3
Y1 - 2002/10/3
N2 - High speed milling (HSM) using small diameter solid or indexable insert tungsten carbide end mills, with coatings such as TiAIN is now an established technology for manufacturing moulds and dies in a range of hardened tool steels. The paper presents experimental results and corresponding empirical models for workpiece surface integrity (SI) of hardened AISI H13 hot work tool steel, when HSM using solid carbide ball nose end mills coated with TiAIN. The influence of cutting speed, feed rate and workpiece angle on SI (workpiece surface roughness, microstructure, microhardness and residual stress) was studied using a full factorial experimental design with two levels of each factor. Where appropriate, empirical models were proposed in order to predict SI based on cutting parameter inputs. No significant changes in microstructure and microhardness below the machined surface were found. Within the range of cutting parameters tested, the operating parameters that gave the lowest workpiece surface roughness did not result in the most compressive residual stress distribution below the machined surface. A compromise in parameter selection is therefore necessary to achieve desired roughness and integrity. (C) 2002 Elsevier Science B.V. All rights reserved.
AB - High speed milling (HSM) using small diameter solid or indexable insert tungsten carbide end mills, with coatings such as TiAIN is now an established technology for manufacturing moulds and dies in a range of hardened tool steels. The paper presents experimental results and corresponding empirical models for workpiece surface integrity (SI) of hardened AISI H13 hot work tool steel, when HSM using solid carbide ball nose end mills coated with TiAIN. The influence of cutting speed, feed rate and workpiece angle on SI (workpiece surface roughness, microstructure, microhardness and residual stress) was studied using a full factorial experimental design with two levels of each factor. Where appropriate, empirical models were proposed in order to predict SI based on cutting parameter inputs. No significant changes in microstructure and microhardness below the machined surface were found. Within the range of cutting parameters tested, the operating parameters that gave the lowest workpiece surface roughness did not result in the most compressive residual stress distribution below the machined surface. A compromise in parameter selection is therefore necessary to achieve desired roughness and integrity. (C) 2002 Elsevier Science B.V. All rights reserved.
KW - hot work tool steel
KW - high speed milling
KW - workpiece surface integrity
KW - modelling
UR - http://www.scopus.com/inward/record.url?scp=0037015550&partnerID=8YFLogxK
U2 - 10.1016/S0924-0136(02)00282-0
DO - 10.1016/S0924-0136(02)00282-0
M3 - Article
VL - 127
SP - 325
EP - 335
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
SN - 0924-0136
IS - 3
ER -