Characterization of Plasma Cut Surfaces with Water Bed Welding Metallic Materials

2014 ◽  
Vol 1029 ◽  
pp. 50-55 ◽  
Author(s):  
Teodor Machedon-Pisu ◽  
Mihai Alexandru Luca ◽  
Elena Machedon Pisu
Keyword(s):  
Heat Affected Zone ◽  
Base Material ◽  
Slag Layer ◽  
Work Piece ◽  
Metallic Materials ◽  
Surface Microhardness ◽  
Free Atmosphere ◽  
The Cost

The purpose of this paper is to analyze the quality of cut surfaces with plasma in the free atmosphere and in the water bed of metallic materials being welded. This process leads to savings in labor, materials, supplies and other costs of production, having as purpose the decrease in the cost of cutting the work piece and reducing deformation and heat affected zone in the piece cut, providing alternatives to processing cutting. It was designed and built a device cutting water bed that has been proven. In the macroscopic analysis reveals that the cutting in water bed slag layer is lower. After microhardness measurements (base material, heat affected zone, the cut) it is found that the cutting in water bed cut occurs on the surface microhardness increased by 36% .

Characterization of Cr2O3 Adhesion Properties by Destructive Testing in Accordance with the APS Metal Spraying Process Parameters

2017 ◽  
Vol 750 ◽  
pp. 91-96
Author(s):  
Roxana Alexandra Gheța ◽  
Mariana Goran ◽  
Alina Elena Bușaru ◽  
Laurenția Bichir ◽  
Gabriel Marius Dumitru
Keyword(s):  
Base Material ◽  
Basic Material ◽  
Destructive Testing ◽  
Adhesion Properties ◽  
Quality Of Products ◽  
Sprayed Coating ◽  
Metal Spraying ◽  
Spraying Process

This paper aims to study the correlation between some parameters of the metalspraying by APS process and the level of chromium oxide (Cr2O3) adhesion to the base material. Among the properties of the layers deposited by APS are those of wear resistance. In the context of evaluating the coatings properties and understanding aspects related to the coat structure phenomena, the purpose of the experiment presented here is to characterize the adherence of thermal sprayed coating Cr2O3. Because, the main problem of metalspraying layers is adhesion to the base material, there were subjected to tensile testing 2 samples made by 1C45 steel, which were previously bonded with an epoxy glue. The adhesion of the deposited layer on the basic material is important for ensuring the quality of products. The results show that the quality of surfaces and the existence of accidental defects at the interface lead to a decrease of adherence.

scholarly journals Braze Welding of Elements of Industrial Fittings

2015 ◽  
Vol 60 (1) ◽  
pp. 391-401
Author(s):  
J. Słania ◽  
G. Golański ◽  
W. Gasz
Keyword(s):  
Heat Affected Zone ◽  
Base Material ◽  
Welding Method ◽  
Hardness Tests

Abstract Resistance to stretching, a quality of specimen made by braze welding method were examined as well as usefulness of this method in industry was described. Technology and materials, which are used during braze welding, are depicted on the base of an inspection of joints. The results of macroscopic examinations of sample joints (base material, heat-affected zone and braze weld) are given. Furthermore, the results of the resistance, plasticity and hardness tests of sample joints are presented.

scholarly journals Effect of cutting parameters and machining environments on the chips characteristics and surface quality of commercial high-conductive materials

2021 ◽  
Vol 4 (4) ◽  
pp. 325-334
Author(s):  
Mohammad Salim Kaiser
Keyword(s):  
Mechanical Characterization ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Depth Of Cut ◽  
Metallic Materials ◽  
Conductive Materials ◽  
Machining Fluids ◽  
Machined Surfaces

The present paper is on the physical and mechanical characterization of machined chips of commercially available highly conductive metallic materials, namely aluminium and copper under different machining environments. More specifically, geometry and hardness of chips as well as the chips removal effect on the machined surfaces are investigated in a quantitative fashion as a function of machining fluid and cutting parameter. The machining is carried out by using a horizontal shaper machine with a V-shaped HSS tool under three different machining fluids, where the feed rate is kept constant, while the cutting speed and depth of cut are varied. The geometry and hardness of the machined chips as well as the quality of machined surfaces are found to be affected quite significantly by the change of machining condition, particularly by the machining fluids.

scholarly journals CRITERIA FOR ASSESSING THE COST OF MANUFACTURING PROCESSES AND YOU EFFECTIVITY

2020 ◽  
Vol 5 (9) ◽  
pp. 7-13
Author(s):  
Ing.Darina Matisková
Keyword(s):  
Cost Reduction ◽  
Evaluation Criteria ◽  
Metallic Materials ◽  
Machined Surface ◽  
Economic Criterion ◽  
Technical Parameters ◽  
The Cost ◽  
Required Quality ◽  
Tool Durability

The aim of this paper is to theoretically evaluate the process of machining metallic materials and at the same time evaluate the cost reduction defined by the evaluation criteria. When cutting conditions and tool durability optimizing, it is necessary to apply certain optimizing criterion within certain restraining conditions. [12] The restrictions are given by technical parameters of a machine, tool, machined material, required quality of machined surface etc. The essential economic criterion is the amount of production cost. The notion of “machinability of materials” is a complex of characteristics of the machined material which is monitored in the view of its fitness for the production in a certain way of machining.

scholarly journals Preparation and Characterization of Graphene from Refined Benzene Extracted from Low-Rank Coal: Based on the CVD Technology

Molecules ◽  
2021 ◽  
Vol 26 (7) ◽  
pp. 1900
Author(s):  
Dun Wu ◽  
Meichen Wang ◽  
Jiawei Zeng ◽  
Jinyuan Yao ◽  
Cheng Jia ◽  
...  
Keyword(s):  
Carbon Source ◽  
Research Area ◽  
Low Rank ◽  
Low Rank Coal ◽  
Preparation Methods ◽  
Industrial Preparation ◽  
Graphene Production ◽  
The Cost

Industrial preparation of graphene has been a research hotspot in recent years. Finding an economical and practical carbon source and reducing the cost of production and instrument is significant in industrial graphene production. Coal is a common carbon source. Efficient improvement and utilization in the cleaning of coal has recently been a popular research area. In this study, we developed a set of graphene preparation methods based on Anhui Huainan’s low-rank gas coal (HNGC). Using self-built experimental equipment, benzene precursor was prepared from HNGC and used as carbon source to realize graphene growth. The quality of the graphene was characterized by a high-resolution microscope and Raman spectrometer. This study provides a new idea and method for the preparation of low-rank coal-based graphene.

Dimensional Characterization of Surface Contours of Cut Surfaces with Plasma Straight Metallic Materials

2015 ◽  
Vol 754-755 ◽  
pp. 724-727
Author(s):  
Teodor Machedon-Pisu ◽  
Kamarudin Hussin ◽  
Elena Machedon Pisu
Keyword(s):  
Cutting Speed ◽  
Base Material ◽  
Dimensional Accuracy ◽  
Angular Deviation ◽  
Plasma Cutting ◽  
Free Atmosphere ◽  
Cut Edge ◽  
Water Cut ◽  
Cutting Bed ◽  
The Cost

The purpose of this paper is to analyze the dimensional accuracy of the surfaces straight edges from cutting plasma free atmosphere or water bed. The aim was to identify any defects and if bed piss water cut in some way influence the surface quality and dimensional contours right. Mechanical thermal plasma cutting bed prevents overheating of the water has the advantage that the base material and thus the parameters related to compliance with the slag assures cut pieces at the bottom, this saves the cost of production. Mechanized plasma cutting bed heat the water does not affect the value of angle tolerance compared to cutting outdoor (angular deviation determined either for parts or cut outdoor water bed ranged between 7-9 degrees / side). The causes of and ways to reduce the deviation angle cut edge is determined by other factors such as cutting speed, distance torch-material, cutting nozzle erosion.

Consideration and Characterization of Pavement Construction Variability

1998 ◽  
Vol 1632 (1) ◽  
pp. 40-50 ◽  
Author(s):  
Arti Patel ◽  
Marshall Thompson
Keyword(s):  
Analysis Techniques ◽  
Construction Methods ◽  
State Highway ◽  
Considerable Debate ◽  
Pavement Construction ◽  
The Cost ◽  
State Highway Agencies ◽  
Data Collection Effort

Recently, many state highway agencies have adopted quality control/ quality assurance (QC/QA) techniques with the desire to improve the quality of construction and provide an incentive or environment for contractors to try new or innovative construction methods or materials. Reduced construction and material variability is one measure of improved “quality” of construction. Although decreased variability may be desirable, there is considerable debate and confusion about the cost-effectiveness of the QC/QA programs. The data collection effort and three variability analysis techniques that may be used to evaluate the effectiveness of the QC/QA programs are discussed here. Characterization of variability and application of the techniques for Illinois’ QC/QA program are also presented.

Physicochemical and bacteriological characterization of hospital effluents and their impact on the environment

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Human Health ◽  
Fecal Coliforms ◽  
Chemical Pollution ◽  
Hospital Effluents ◽  
Biological Contaminants ◽  
Almost All ◽  
Direct Discharge ◽  
Significant Chemical

Liquid effluents discharged by hospitals may contain chemical and biological contaminants whose main source is the different substances used for the treatment of patients. This type of rejection can present a sanitary potentially dangerous risk for human health and can provoke a strong degradation of diverse environmental compartments mainly water and soils. The present study focuses on the quality of the liquid effluents of Hassani Abdelkader’s hospital of Sidi Bel-Abbes (West of Algeria). The results reveal a significant chemical pollution (COD: 879 mgO2/L, BOD5: 850 mgO2/L, NH4+ : 47.9 mg/l, NO2- : 4.2 mg/l, NO3- : 56.8 mg/l with respect to WHO standard of 90 mgO2/L, 30 mgO2/L, 0.5 mg/l, 1 mg/l and 1 mg/l respectively). However, these effluents are biodegradable since the ratio COD/BOD5 do not exceeded the value of 2 in almost all samples. The presence of pathogen germs is put into evidence such as pseudomonas, the clostridium, the staphylococcus, the fecal coliforms and fecal streptococcus. These results show that the direct discharge of these effluents constitutes a major threat to human health and the environment.

Pengaruh Kompetensi Coder terhadap Keakuratan dan Ketepatan Pengkodean Menggunakan ICD 10 di Rumah Sakit X Pekanbaru Tahun 2016

2018 ◽  
Vol 1 (1) ◽  
pp. 31-43
Author(s):  
Nur Maimun ◽  
Jihan Natassa ◽  
Wen Via Trisna ◽  
Yeye Supriatin
Keyword(s):  
Medical Record ◽  
Human Error ◽  
Medical Personnel ◽  
Quality Of Data ◽  
Accuracy And Precision ◽  
Result Show ◽  
Study Implementation ◽  
Icd 10 ◽  
The Cost

The accuracy in administering the diagnosis code was the important matter for medical recorder, quality of data was the most important thing for health information management of medical recorder. This study aims to know the coder competency for accuracy and precision of using ICD 10 at X Hospital in Pekanbaru. This study was a qualitative method with case study implementation from five informan. The result show that medical personnel (doctor) have never received a training about coding, doctors writing that hard and difficult to read, failure for making diagnoses code or procedures, doctor used an usual abbreviations that are not standard, theres still an officer who are not understand about the nomenclature and mastering anatomy phatology, facilities and infrastructure were supported for accuracy and precision of the existing code. The errors of coding always happen because there is a human error. The accuracy and precision in coding very influence against the cost of INA CBGs, medical and the committee did most of the work in the case of severity level III, while medical record had a role in monitoring or evaluation of coding implementation. If there are resumes that is not clearly case mix team check file needed medical record the result the diagnoses or coding for conformity. Keywords: coder competency, accuracy and precision of coding, ICD 10

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