L. P. Xu
,
M. H. Xu
,
L. Li
,
Y.A. Min
,
X.Z Xuand R.H .Liu (Department of Materials Science and Engineering
,
Shanghai University
,
Shanghai 200072
,
China) (Shanghai No.5 Iron and Steel Factory
,
Shanghai 200940
,
China)
金属学报(英文版)
The composition of a bearing steel was designed for limited hardenability by use of Grossmann's method. A medium frequency induction Process was applied to heat bearings to ensure penetrant heating and suitable solving of carbon and other elements in the matrix. The hardened depth measured from the end quenching test samples and actual bearings matches well with the designed one.
关键词:
: bearing steel
,
null
,
null
H.M. Geng
,
X.C. Wu
,
Y.A. Min
,
null
,
null
,
null
,
null
,
null
,
null
,
null
金属学报(英文版)
Experiments conducted to determine the effect of copper addition on the machinability of plastic mould steel 4Cr16Mo were presented. The machinability of mould steel 4Cr16Mo was improved obviously by adding Cu. The top wear of 4Cr16Mo with copper was less than that without copper. Cu-rich phase had the effect of lubricant and heat conductivity as solid lubricant, which reduced cutting-tool wear, improved machinability and increased service life of cutting-tool. With the increase of copper addition, the hot-working character of 4Cr16Mo decreased. The optimal hot-working parameters 4Cr16Mo with copper were determined by tensile test and compression test. The rate of deformation should be adopt as 0.6 s-1. The heating-up temperature, initial forging temperature and terminal forging temperature were 1200℃, 1150℃ and 950℃, respectively.
关键词:
machinability
,
cutting-tool
,
hot-shortness
