scholarly journals A review on the development of electro-carburisation process

2022 ◽  
Vol 1217 (1) ◽  
pp. 012010
Author(s):  
S C On ◽  
S A Bahrin ◽  
M Gakim ◽  
W Y H Liew ◽  
F M Tamiri ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Mild Steel ◽  
Molten Salt ◽  
Surface Hardness ◽  
Case Hardening ◽  
Cyanide Bath ◽  
Quenching Process ◽  
Research Findings ◽  
Rich Liquid

Abstract The purpose of this paper is to review the early development of electro-carburisation technology and the research findings related to the electro-carburisation process. In general, conventional liquid carburisation of steel using a molten cyanide bath is carried out to improve the performance of mild steel, however this process produces toxic cyanide waste. Thus, other alternatives for liquid carburisation are necessary. Electro-carburisation process using carbonate-base molten salt, under a CO2 environment was developed as one of the alternatives to liquid carburising. Metal to be treated is exposed to the carbon-rich liquid in the molten cyanide bath and electro-carburisation. However, the metal is simply immersed inside the cyanide bath during conventional liquid carburising, while connected to the cathode in the electro-carburisation. The electro-carburisation involves a diffusion of carbon atoms into the surface of the metal which enhance the surface hardness of the metal. The effects of electrolysis parameters to the surface hardness and case hardening of treated metal have been reported in several journals. This article summarises the research findings. Apart from that, the quenching process and heat treatment post quenching also plays an important role in the quality of the carburised metal, therefore also reviewed in this article.

Pitting Life of Ground, Carburized and Hardened Gears With Uncontrolled Heat Treat Distortion

1998 ◽  
Author(s):  
A. K. Rakhit
Keyword(s):  
Heat Treatment ◽  
Surface Hardness ◽  
Lower Surface ◽  
Significant Loss ◽  
The Other ◽  
Tooth Surface ◽  
Realistic Evaluation ◽  
Heat Treat ◽  
Stock Removal

Abstract Carburized and hardened gears are generally ground to improve the quality of distorted tooth geometry caused by heat treatment. As long as the distortion is low and predictable, stock removal from teeth is small up to a maximum of 0.005 inch from each flank. This allows minimum tooth surface hardness reduction with no deterioration of these gears. Uncontrolled distortion, on the other hand, may result in an undue amount of stock removal with a significant loss of tooth surface hardness. Lower surface hardness reduces gear life due to tooth pitting. For heavily distorted gears, the pitting life may be reduced as much as 30% after grinding. For a realistic evaluation of the pitting life of ground, carburized gears with uncontrolled distortion, derating factors are established for a number of gear materials.

Quality Control of Heat-Treated Surface of 20CrMo Steel Transmission Countershaft

2011 ◽  
Vol 199-200 ◽  
pp. 1528-1531
Author(s):  
Hong Mei Wang ◽  
Xiao Juan Wang ◽  
Xiao Chun Ma
Keyword(s):  
Heat Treatment ◽  
Process Parameters ◽  
Surface Hardness ◽  
Reliable Operation ◽  
Soft Zone ◽  
Automotive Transmission ◽  
Heat Treated ◽  
Effective Depth ◽  
Hardened Surface

After heat treatment, the surface hardness and effective depth of hardened layers of automotive transmission countershaft, determines the quality of the part itself as well as the normal and reliable operation of the transmission assembly. The paper analyzes the specific reasons for such problems as soft zone on the hardened surface of transmission countershaft when proceeding with carbonitriding in the controlled atmosphere furnace, a multi-purpose furnace. And with process parameters adjusted, the process parameters of heat treatment are corrected that the soft zone has been eliminated and the quality of parts has been effectively controlled.

scholarly journals PENGARUH PROSES QUENCHING DENGAN MEDIA PENDINGIN AIR DAN OLI TERHADAP KEKERASAN BAJA DAN STRUKTUR MIKRO BAJA S45C

JTAM ROTARY ◽  
2020 ◽  
Vol 2 (2) ◽  
pp. 137
Author(s):  
Anton Tri Wibowo ◽  
Achmad Kusairi Samlawi
Keyword(s):  
Heat Treatment ◽  
Spare Part ◽  
Steel Product ◽  
Quenching Temperature ◽  
Heavy Equipment ◽  
Quenching Process ◽  
Original Part ◽  
Rule Out ◽  
Replacement Time

Perlakuan panas merupakan salah satu alternatif untuk meningkatkan kualitas suatu produk baja, pada saat mengoperasikan excavator di pertambangan tidak menutup kemungkinan komponen yang rusak atau aus harus segera diganti karena akan menghambat kinerja alat berat tersebut, tidak jarang akibatnya. untuk ketersediaan spare part original sedikit atau harus dipesan terlebih dahulu, untuk mengatasi lamanya waktu penggantian tentunya pihak perusahaan akan mencari komponen non original yang banyak beredar dipasaran tentunya dari segi kualitas atau waktu pemakaian. menjadi lebih pendek dari komponen aslinya. Untuk meningkatkan kualitas komponen tersebut maka dilakukan proses heat treatment (quenching) untuk meningkatkan kualitas komponen tersebut. Perlakuan panas dilakukan mulai dari memanaskan spesimen hingga suhu yang sesuai divariasikan (800 °C, 850 °C dan 900 °C) kemudian ditahan di dalam oven selama 2 jam dan kemudian didinginkan secara cepat menggunakan air dan minyak, jenis pendinginan ini akan berpengaruh kekerasan dan mikro. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh temperatur quenching dan jenis pendinginan terhadap kekerasan dan mikrostruktur. Heat treatment is an alternative to improve the quality of a steel product, when operating an excavator in mining does not rule out the possibility of damaged or worn components which must be replaced immediately because it will hamper the performance of the heavy equipment, not infrequently due to the availability of spare the original part is a little or must be ordered in advance, to overcome the lengthy replacement time of course the company will look for non-original components that are circulating in the market of course in terms of quality or usage time to be shorter than the original components. To improve the quality of these components, a heat treatment (quenching) process is carried out to improve the quality of the components. Heat treatment carried out starting from heating the specimens to the appropriate temperature varied (800 °C, 850 °C and 900 °C) then held in the oven for 2 hours and then cooled quickly using water and oil, this type of cooling will affect the hardness and microstructure. The purpose of this study was to determine the effect of quenching temperature and type of cooling on hardness and microstructure.

Building research capacity and capabilities in Fiji: are we there yet?

2020 ◽  
Vol 21 (5) ◽  
pp. 265-271
Author(s):  
Jyotishna Mudaliar ◽  
Bridget Kool ◽  
Janice Natasha ◽  
Judith McCool
Keyword(s):  
Low Income ◽  
Research Capacity ◽  
Research Knowledge ◽  
Research Skills ◽  
Research Findings ◽  
Access And Quality ◽  
The University ◽  
Local Investigator ◽  
Research Capacity Development

Introduction: A barrier to local investigator-led research in low income settings, is the limited availability of personnel with appropriate research skills or qualifications to conduct the type of research required for evidence-informed policy making to improve access and quality of health care. In response to this, Fiji National University’s College of Medicine, Nursing and Health Sciences in Fiji, collaborated with academics based at the University of Auckland, New Zealand to deliver a series of research capacity development workshops in Fiji. Methods: Participants who attended any of the nine workshops (n=123) were contacted via email to take part in a brief survey regarding their perceptions of the effectiveness of the research capacity building workshops. Of the possible 123 participants, 80% (n=76) completed the questionnaire.  Results: Findings demonstrate that the majority of participants reported that they had gained research skills from the workshops (75%) including proposal development skills (68%) and knowledge of appropriate research methods (59%). Furthermore, 70% agreed that the workshops built their research confidence.  Since attending a workshop, 18% of respondents had successfully applied and received funding for research grants and/or fellowships.  Barriers to conduct research included workload (75%), lack of research knowledge, experience or skills (51%), and lack of institutional support (41%). Suggestions for future workshops included: more focus on data analysis, regular courses rather than ‘one offs’, and preparation of research findings (e.g. publications). Conclusion: Our findings indicate that research workshops of this nature may increase individual research capabilities but sustained, locally led initiatives, backed by institutional and supplementary technical support are essential.

Communicating about the brain in the digital era

2017 ◽  
Author(s):  
Julie M. Robillard ◽  
Emily Wight
Keyword(s):  
Brain Health ◽  
Ethical Considerations ◽  
Participatory Communication ◽  
Health Decision Making ◽  
Digital Era ◽  
Health Decision ◽  
Dissemination Of Research ◽  
Research Findings ◽  
Science Community

Neuroscience communication is at a turning point, with tremendous opportunity for growth and democratization. The rise of the web and social media as platforms for dissemination of research findings and stakeholder engagement presents both unique opportunities and critical ethical considerations. Online- and mobile-based information and services for brain health may enhance the autonomy of users in health decision-making. However, nonadherence to ethical norms, such as informed consent and conflict of interest by digital content creators, may lead to harm. The challenges of communicating neuroscience in the digital era will require the rejection of the traditional top-down dissemination of research findings by the science community. Communicators must embrace participatory communication models, frame science in non-sensationalized, lay-friendly terms, improve the ethics of online resources and web users’ ability to assess the quality of information and source material, and educate scientists in the importance of transparency and public engagement.

scholarly journals Adjustment of Olive Fruit Temperature before Grinding for Olive Oil Extraction. Experimental Study and Pilot Plant Trials

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 586
Author(s):  
Eddy Plasquy ◽  
José María García Martos ◽  
María del Carmen Florido Fernández ◽  
Rafael Rubén Sola-Guirado ◽  
Juan Francisco García Martín
Keyword(s):  
Heat Treatment ◽  
Pilot Plant ◽  
Heating System ◽  
Oil Extraction ◽  
Warm Up ◽  
Precise Adjustment ◽  
Olive Cultivars ◽  
Plant Trials ◽  
Washing Water

Harvesting at high temperatures and bulk transport can negatively influence the quality of olives and lead to undesirable alterations in the extracted oil. Cooling the fruit in the field would be the most logical solution, but it means that the olives arrive too cold at the mill for immediate processing. In this work, the use of warm water in the washing tub to warm up the fruit before grinding instead of flash heat treatment on the paste was assessed in two experiments. In the first one, at the laboratory level, the temperature after milling was determined in three olive cultivars, previously stored at 5 or 10 °C, and then submerged at different water temperatures (25, 30, and 35 °C) for 15, 30, 45, and 60 s. In the second one, two batches of olives were cooled in the field at 5 °C and then conditioned with washing water to obtain a paste at the entrance of the pilot plant malaxer at 27 °C. The temperature of the olives was measured at five points from the discharging up to their entering, as paste, into the malaxer. The results demonstrated the feasibility of the method as the temperature of the ground olives was kept at the desired temperature (28 ± 1 °C). The trials highlight the potential for automating an even more precise adjustment of the temperature of the olives before milling once the washing tub is equipped with a safe heating system.

scholarly journals Effect of Heat Treatment by the Sous-Vide Method on the Quality of Poultry Meat

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1610
Author(s):  
Wiesław Przybylski ◽  
Danuta Jaworska ◽  
Katarzyna Kajak-Siemaszko ◽  
Piotr Sałek ◽  
Kacper Pakuła
Keyword(s):  
Heat Treatment ◽  
Sensory Quality ◽  
Treatment Method ◽  
Poultry Meat ◽  
Chicken Breast ◽  
Breast Meat ◽  
Sous Vide ◽  
The Impact ◽  
Cooked Meat

An increase in the consumption of poultry meat has been observed due to its availability, nutritional value, and delicate flavor. These characteristics make it possible to prepare, with the use of spices and other additives, many different dishes and products for increasingly demanding consumers. The sous-vide technique is increasingly being used to give new sensory attributes to dishes in gastronomy. The study aimed to assess the impact of the heat treatment method, i.e., the sous-vide method, as compared to traditional cooking, on the sensory quality of poultry meat, as well as the efficiency of the process with regard to technological quality. The cooking yield with the sous-vide method of processing poultry meat was higher than with the traditional method of cooking in water (88.5% vs. 71.0%, respectively). The meat was also found to be redder (a* = 254 vs. 074) and less yellow (b* = 1512 vs. 1649), as well as more tender. The sensory quality of chicken breast meat obtained by the sous-vide method was higher in terms of attributes such as color tone, tenderness, juiciness, and overall quality. At the same time, it was lower in terms of the odor of cooked meat and the flavor of cooked meat as compared to meat subjected to traditional cooking.

Structural and FEM analysis of heat treatment effects on mild steel

2021 ◽  
Author(s):  
Aaditya Srivastava ◽  
Ansh Jain ◽  
Shubham Rajput ◽  
Hari Om Singh ◽  
Bhaskar Chandra Kandpal ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Mild Steel ◽  
Treatment Effects ◽  
Fem Analysis

Facile single-step ammonia heat-treatment and quenching process for the synthesis of improved Pt/N-graphene catalysts

2013 ◽  
Vol 266 ◽  
pp. 433-439 ◽  
Author(s):  
Bin Xiong ◽  
Yingke Zhou ◽  
Ryan O’Hayre ◽  
Zongping Shao
Keyword(s):  
Heat Treatment ◽  
Single Step ◽  
Quenching Process

Research on the V/H Inspection of Spiral Bevel Gear before Heat Treatment

2013 ◽  
Vol 483 ◽  
pp. 166-169
Author(s):  
Jia Lun Qiu ◽  
Rui Rong Zhao ◽  
Ying Jie Wang ◽  
Wei Zhao ◽  
Jing Cai Li
Keyword(s):  
Heat Treatment ◽  
Contact Region ◽  
Bevel Gear ◽  
Test Method ◽  
Spiral Bevel Gear ◽  
Basic Definition ◽  
Technical Process ◽  
Inspection Method ◽  
Spiral Bevel

The V / H inspection method is analyzed, including its basic definition, purpose and V / H inspection technical process of Gleason Company. In order to improve the quality of the contact region, Gleasons V / H test method is conducted for V/H inspection of spiral bevel gear before heat treatment, and analysis of experimental data is given.

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