INVESTIGATION OF THE MATERIAL QUALITY PARAMETERS OF THE SURFACE LAYER OF THE PART WHEN PROCESSING WITH ELBOROV GRINDING WHEELS ON A GALVANIC BUNDLE

2021 ◽  
pp. 11-15
Author(s):  
D. S. Golovanov ◽  
V. F. Bezyazychzny ◽  
E. V. Kiselev
Keyword(s):  
Surface Layer ◽  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Nickel Content ◽  
Quality Parameters ◽  
Grinding Wheels ◽  
Grinding Method ◽  
High Nickel ◽  
Iron Nickel ◽  
Iron Nickel Alloys

The article considers the results of research on the influence of technological conditions when processing circles made of cubic boron nitride on the main quality parameters of the surface layer of parts made of a material with a high Nickel content. The advantages of the deep grinding method for processing iron-Nickel alloys with grinding wheels made of cubic boron nitride on a galvanic bond are presented.

DIFFUSION OF Ni63 IN IRON, COBALT, NICKEL, AND TWO IRON–NICKEL ALLOYS

1959 ◽  
Vol 37 (10) ◽  
pp. 1629-1636 ◽  
Author(s):  
J. R. MacEwan ◽  
J. U. MacEwan ◽  
L. Yaffe
Keyword(s):  
Surface Activity ◽  
Nickel Alloys ◽  
Nickel Content ◽  
The Self ◽  
Iron Cobalt ◽  
Self Diffusion ◽  
Cobalt Nickel ◽  
Iron Nickel ◽  
Iron Nickel Alloys ◽  
Cobalt And Nickel

The self-diffusion of nickel and the diffusion of Ni63 into iron, cobalt, and two iron–nickel alloys was studied using the technique of decrease in surface activity, The nickel self-diffusion results are compared to previously reported values. Nickel is found to diffuse more slowly than iron in the iron-rich portion of the iron–nickel system. The rate of nickel diffusion increases with increasing nickel content. A comparison is made between the present results for diffusion of Ni63 into iron, cobalt, and nickel with reported values for diffusion of Co60 and Fe59 in the same metals. In each solvent, the magnitudes of the activation energies, Q, are such that QNi > QCo > QFe.

Automation of calculations of cutting modes taking into account the wear of cubic boron nitride tools when applying solid lubricants

2021 ◽  
pp. 67-70
Author(s):  
Keyword(s):  
Boron Nitride ◽  
High Speed ◽  
Solid Lubricant ◽  
Cubic Boron Nitride ◽  
High Speed Steel ◽  
Solid Lubricants ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Ceramic Bond ◽  
Calculation System

The effect of a solid lubricant on the wear of cubic boron nitride grinding wheels on a ceramic bond of different hardness and grain size in the processing of high-speed steel is investigated. The dependences of the change in the wear of cubic boron nitride on the parameters of the processing mode are determined. An automated calculation system is proposed to control the consumption of cubic boron nitride grinding wheels in production conditions. Keywords: solid lubricant, grinding, high speed steel, cubic boron nitride grinding wheel, consumption, wear, grinding mode. [email protected]

Research of Grinding Material Tools by Modern Grinding Wheels

2013 ◽  
Vol 581 ◽  
pp. 211-216 ◽  
Author(s):  
Jiří Čop ◽  
Imrich Lukovics
Keyword(s):  
Boron Nitride ◽  
Surface Quality ◽  
High Surface ◽  
Cubic Boron Nitride ◽  
High Accuracy ◽  
Grinding Wheels ◽  
Cutting Depth ◽  
High Surface Quality ◽  
Materials Used

This research paper focuses on grinding of materials used for tools (100Cr6 (CSN 4 14109), X210Cr12 ( CSN 4 19436) and epoxy resin) using grinding wheels from cubic boron nitride and diamond. The disadvantage of grinding of difficult-to-machine materials is higher wear of grinding wheels. The modern grinding wheels are able to achieve high accuracy of dimensions and high surface quality with a smaller wear of grinding wheels then grinding wheels from conventional materials. Correctly selected technological conditions are one of the most important matters to achieve the required surface quality. The main aim of this research is to determine the influence of technological conditions to quality of surface after planar grinding. The research determines the influence of the grain type of grinding wheels, feed rate and cutting depth on the quality of functional surfaces.

ACI TYPE CN-7M

Alloy Digest ◽  
1981 ◽  
Vol 30 (10) ◽  
Keyword(s):  
Mechanical Property ◽  
Fracture Toughness ◽  
Copper Alloys ◽  
Nickel Content ◽  
Heat Treating ◽  
Good Resistance ◽  
Nickel Chromium ◽  
Property Data ◽  
High Nickel ◽  
Iron Nickel

Abstract Type CN-7M covers a group of related complex iron-nickel-chromium-molybdenum-copper alloys that contain more nickel than chromium. The high nickel content together with molybdenum and copper give these alloys especially good resistance to sulfuric acid and many reducing chemicals. Among the alloys included in Type CN-7M, the so-called 20 alloy is produced in greatest quantity. The physical and mechanical property data herein are for the 20 alloy. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: SS-393. Producer or source: Various stainless steel casting companies.

Effective thermal properties of grinding wheels and grains

1998 ◽  
Vol 212 (8) ◽  
pp. 661-669 ◽  
Author(s):  
M N Morgan ◽  
W B Rowe ◽  
S C E Black ◽  
D R Allanson
Keyword(s):  
Thermal Conductivity ◽  
Thermal Properties ◽  
Boron Nitride ◽  
Thermal Performance ◽  
Cubic Boron Nitride ◽  
Energy Partitioning ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Abrasive Grains ◽  
Effective Thermal Properties

The thermal properties of the grinding wheel are required for energy partitioning in grinding. This paper describes an investigation of the effective thermal properties of alumina and cubic boron nitride (CBN) grinding wheels. Results are presented for a novel sensor that was designed to measure the bulk thermal properties of grinding wheel samples. The effective bulk thermal properties of the grinding wheel and the effective thermal properties of the abrasive grains were also investigated. It was found that the bulk thermal property is dominated by the properties of the bond and does not account for the improved thermal performance of CBN compared with alumina. Values of the effective thermal conductivities for alumina and CBN abrasive grains are therefore proposed. It is concluded that the effective thermal conductivity of the grains is best obtained inversely from grinding experiments.

Fundamental Technology and Properties Research of Brazing CBN Grinding Wheels

2010 ◽  
Vol 154-155 ◽  
pp. 209-213
Author(s):  
Qian Wang
Keyword(s):  
Boron Nitride ◽  
Cubic Boron Nitride ◽  
Vacuum Furnace ◽  
Ti Alloy ◽  
X Ray Diffraction ◽  
Grinding Wheels ◽  
X Ray ◽  
Active Filler ◽  
New Generation

In order to produce new generation monolayer brazing CBN(cubic boron nitride) grinding wheels, an active filler alloys(Ag-Cu-Ti) were tested in vacuum furnace. The results show that Ag-Cu-Ti alloy exhibits good wetting and bonding toward as CBN grits. SEMEDS microanalyses have shown that during brazing Ti in Ag-Cu-Ti alloy segregated preferentially to the surface of the CBN to form a Ti-rich reaction produce. X-ray diffraction reveals that the wetting and bonding behaviour on CBN surface by Ag-Cu-Ti alloy melt is realized through TiN and TiB2 which is produced by interaction between Ti atoms of Ag-Cu-Ti alloy and N or B atoms of CBN surface.

Design of Flexible Grinding Wheel With Variable Hub Thickness

1994 ◽  
Vol 116 (2) ◽  
pp. 260-262 ◽  
Author(s):  
Z. M. Bzymek ◽  
G. Song ◽  
T. D. Howes ◽  
R. E. Garrett
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Boron Nitride ◽  
Variable Thickness ◽  
Cubic Boron Nitride ◽  
Grinding Wheel ◽  
The Finite Element Method ◽  
Grinding Wheels ◽  
Major Step ◽  
Element Method

In this paper, various Cubic Boron Nitride (CBN) grinding wheels designed to suppress chatter are statically and dynamically analyzed and compared by means of the Finite Element Method (FEM). As a result of these analyses, a flexible wheel with a variable thickness hub is proposed. Theoretically, the new wheel should suppress chatter and thus be a major step forward in grinding wheel design.

Increasing the effectiveness of deep grinding of the locking element of a turbine blade with an "Aerobor® II" highly porous cubic boron nitride grinding wheel

2021 ◽  
pp. 68-71
Author(s):  
Keyword(s):  
Boron Nitride ◽  
Turbine Blade ◽  
Nickel Alloys ◽  
Cubic Boron Nitride ◽  
Turbine Blades ◽  
Grinding Wheel ◽  
High Porosity ◽  
Grinding Wheels ◽  
New Generation ◽  
Highly Porous

The results of testing new generation Aerobor® II cubic boron nitride grinding wheels during machining of the locking element of turbine blades are presented. The advantages of using new high-porosity cubic boron nitride grinding wheels in comparison with abrasive grinding wheels in deep grinding of parts made of heat-resistant nickel alloys are described. Keywords: deep grinding, turbine blade, locking element, high-temperature nickel alloys, high-porosity cubic boron nitride grinding wheel [email protected], [email protected], [email protected]

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