scholarly journals Effect of grain size on belt finishing process of hardened steel parts

2015 ◽  
Author(s):  
ABDELJABAR KHELLOUKI
Keyword(s):  
Grain Size ◽  
Hardened Steel ◽  
Finishing Process

The Roughness of the Hardened Steel Surface Created by the Rolling-Burnishing Process

2015 ◽  
Vol 220-221 ◽  
pp. 881-886 ◽  
Author(s):  
Bogdan Ścibiorski ◽  
Stefan Dzionk
Keyword(s):  
Geometric Structure ◽  
Steel Surface ◽  
Surface Deformation ◽  
Hardened Steel ◽  
Hard Materials ◽  
Finishing Process ◽  
Burnishing Process

Burnishing hard materials can be used as an alternative finishing process. This paper presents the results of burnishing hardened steel. The article discusses surface deformation that occurs during this process and depends on the selected parameters of the geometric structure of the force applied for surface burnishing.

scholarly journals Effect of Undissolved Cementite and Grain Size on Bending Strength of the Carburized and Induction Hardened Steel

1996 ◽  
Vol 82 (8) ◽  
pp. 695-700
Author(s):  
Nobuhiro MURAI ◽  
Yoshihiko KAMADA ◽  
Mitsuo UNO ◽  
Toru TAKAYAMA ◽  
Kazuyuki ORITA ◽  
...  
Keyword(s):  
Grain Size ◽  
Bending Strength ◽  
Hardened Steel

Influence of grain size on the contact endurance of hardened steel

1974 ◽  
Vol 6 (3) ◽  
pp. 342-344
Author(s):  
A. I. Vil'chek ◽  
P. A. Mikhailov ◽  
B. S. Natapov
Keyword(s):  
Grain Size ◽  
Hardened Steel

scholarly journals Surface Finishing of Zirconium Dioxide with Abrasive Brushing Tools

Machines ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 89
Author(s):  
Eckart Uhlmann ◽  
Anton Hoyer
Keyword(s):  
Surface Roughness ◽  
Grain Size ◽  
Tool Wear ◽  
Zirconium Dioxide ◽  
Surface Defects ◽  
Polycrystalline Diamond ◽  
Surface Finishing ◽  
Considerable Influence ◽  
Finishing Process ◽  
Surface Improvement

Brushing with bonded abrasives is a finishing process which can be used for the surface improvement of various materials. Since the machining mechanisms of abrasive brushing processes are still largely unknown and little predating research was done on brushing ceramic workpieces, within the scope of this work technological investigations were carried out on planar workpieces of MgO-PSZ (zirconium dioxide, ZrO2) using brushing tools with bonded grains of polycrystalline diamond. The primary goal was the reduction of grinding-related surface defects under the preservation of surface roughness valleys and workpiece form. Based on microscopy and topography measurements, the grain size sg and the brushing velocity vb were found to have a considerable influence on the processing result. Furthermore, excessive tool wear was observed while brushing ceramics.

Modelling of Hard Broaching

2008 ◽  
Author(s):  
Konrad Wegener ◽  
Guilherme E. Vargas ◽  
Friedrich Kuster ◽  
Fa´bio W. Pinto ◽  
Thomas Schnider
Keyword(s):  
Surface Roughness ◽  
Single Layer ◽  
Hardened Steel ◽  
Tool Geometry ◽  
Optimization Strategy ◽  
Diamond Coating ◽  
Virtual Image ◽  
Finishing Process ◽  
Process Strategy ◽  
Steel Body

Hard broaching is a finishing process to correct geometrical deviations of internal profiles on hardened workpieces, typically using a hardened steel body overlaid with a single layer of metal-bonded diamond grits. The tool essentially has the opposite contour as the workpiece. The process is characterized by an oscillating movement of the broaching tool, while the tool is pushed sequentially deeper into the workpiece. During the retraction phase the chips are removed from the chip spaces. The tool consists of a roughing part and a finishing part to increase the surface quality and reduce the tolerances. For gaining a deeper understanding of the process and for its optimization a stochastic tool model is introduced, which takes into account the differing shape, size, orientation and position of the single grains. Specifications about the tool geometry and the diamond coating as well as process parameters are used as input. The model is capable to predict the active grains, the respective cutting areas, cutting forces and surface roughness of such a virtual image of the broaching tool, which is thus capable to be used to layout and optimize the shape, layer and process strategy of hard broaching. It further allows analyzing the effects of the feed per stroke on the process in dependence of different process and tool parameters. By the modeling a strategy for process optimization is derived. The influences of the optimization strategy on the process are presented and discussed.

scholarly journals Effect of P and C Segregation and Grain Size on Bending Strength of the Carburized and Induction Hardened Steel

1997 ◽  
Vol 83 (3) ◽  
pp. 215-220 ◽  
Author(s):  
Nobuhiro MURAI ◽  
Toru TAKAYAMA ◽  
Masahiro ARAI ◽  
Yoshihiko KAMADA ◽  
Mitsuo UNO ◽  
...  
Keyword(s):  
Grain Size ◽  
Bending Strength ◽  
Hardened Steel

Effect of Shock Loading on the Microstructure of Uniloy 326

1974 ◽  
Vol 32 ◽  
pp. 504-505
Author(s):  
K. P. Staudhammer ◽  
L. E. Murr
Keyword(s):  
Grain Size ◽  
Shock Loading ◽  
Current Investigation ◽  
Two Phase ◽  
05 C ◽  
Shock Deformation ◽  
Heat Treated

The effect of shock loading on a variety of steels has been reviewed recently by Leslie. It is generally observed that significant changes in microstructure and microhardness are produced by explosive shock deformation. While the effect of shock loading on austenitic, ferritic, martensitic, and pearlitic structures has been investigated, there have been no systematic studies of the shock-loading of microduplex structures.In the current investigation, the shock-loading response of millrolled and heat-treated Uniloy 326 (thickness 60 mil) having a residual grain size of 1 to 2μ before shock loading was studied. Uniloy 326 is a two phase (microduplex) alloy consisting of 30% austenite (γ) in a ferrite (α) matrix; with the composition.3% Ti, 1% Mn, .6% Si,.05% C, 6% Ni, 26% Cr, balance Fe.

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