Thermal straightening of tubes made from martensiteaging steels

1985 ◽  
Vol 27 (10) ◽  
pp. 769-770
Author(s):  
T. A. Lebedev ◽  
M. I. Olenin
Keyword(s):  
Thermal Straightening

Thermal straightening of equal-flange steel angles after the finishing stand of the medium-section mill

Metallurgist ◽  
1981 ◽  
Vol 25 (7) ◽  
pp. 272-273
Author(s):  
L. N. Levyi ◽  
A. L. Cherednichenko ◽  
G. G. Antipenko ◽  
L. A. Vakula
Keyword(s):  
Section Mill ◽  
Steel Angles ◽  
Thermal Straightening ◽  
Medium Section

Research on TC4 Alloy Wire Rod Straightening Process

2013 ◽  
Vol 747-748 ◽  
pp. 850-854
Author(s):  
Jian Chao Feng ◽  
Ming He Chen ◽  
Chao Zhang ◽  
Li Ming Guo
Keyword(s):  
Room Temperature ◽  
Simulation Method ◽  
Relevant Research ◽  
Alloy Wire ◽  
Wire Rod ◽  
Different Temperatures ◽  
Tc4 Alloy ◽  
Thermal Straightening ◽  
Calculation Software ◽  
Abaqus Software

Titanium alloy are widely used in various fields, such as Aerospace, Marine and Medical. However, the technology of straightening for TC4 wire rod has not been effectively solved, and relevant research is quite rare. TC4 wire rod is difficult to be straightened under room temperature owing to its special properties. In order to solve this problem, this paper designed a parallel roll thermal straightening system and also developed an automatic intermesh calculation software based on Matlab GUI platform to precalculate the settings of straightening device under different temperatures according to straightening theory. Furthermore, numerical simulation method has been used for straightening process with ABAQUS software before the practical straightening experiment. Finally, using the calculated parameters the straightening experiment was carried out, and results show that this method is feasible and effective.

scholarly journals Effect of Hair Straightening Treatment on Porosity and Cysteic Acid Content of Hair

2020 ◽  
pp. 91-97
Author(s):  
Hadeer M. Sedik ◽  
Shereen F. Gheida ◽  
Wafaa M. Ibrahim ◽  
Noha N. Doghaim
Keyword(s):  
Acid Content ◽  
Cysteic Acid ◽  
Internal Structures ◽  
Hair Samples ◽  
Before And After ◽  
Group A ◽  
Disulfide Content ◽  
Insignificant Difference ◽  
Group B ◽  
Thermal Straightening

Background: Chemical straightening has increased in popularity because of its durability over thermal straightening and because it gives the hair a natural smooth, shiny look, more styling options for a longer time. The aim of this study was to evaluate the degree of damage that occur to the hair after chemical straightener treatment by assessing the change in hair porosity and hair cysteic acid content before and after straightener treatment. Methods: Forty hair samples were collected from female volunteers; each sample was divided into 2 groups; group A (before straightening) and group B (after straightening). Hair samples were washed then blow dried after that hair straightener was applied for 30 min then flat iron was done, hair samples were washed and blow dried. Each group was subjected to test their porosity and Fourier transform infrared spectroscopy examination to assess cysteic acid content. Results: Hair porosity showed significant increase after straitening. Cysteic acid and disulfide content showed insignificant difference between both groups. Conclusion: Hair straighteners may cause great damage to hair internal structures. So, proper choice of the material used and assessing the hair characters before straightening is necessary.

Verzugskompensation beim Schleifen/Distortion compensation during grinding. Computer-aided modelling of distortion compensation strategies

2020 ◽  
Vol 110 (03) ◽  
pp. 159-165
Author(s):  
Christian Schieber ◽  
Matthias-Alexander Hettig ◽  
F. Michael Zäh ◽  
Carsten Heinzel
Keyword(s):  
High Surface ◽  
Research Work ◽  
Ground Surface ◽  
The Finite Element Method ◽  
Distortion Compensation ◽  
High Surface Quality ◽  
Finishing Process ◽  
Finite Elemente ◽  
Finite Elemente Methode ◽  
Thermal Straightening

Der Schleifprozess ist bedeutend für die Endbearbeitung von Bauteilen und erzeugt hohe Oberflächengüten. Durch die Wärmeentwicklung an der geschliffenen Oberfläche können Zugeigenspannungen in das Bauteil eingebracht werden, welche wiederum in Bauteilverzügen resultieren. Zur Abbildung dieser unerwünschten Eigenschaften werden im Folgenden mittels der Finite-Elemente-Methode Wirkmechanismen im Bauteil modelliert. Auf Basis der Simulationsergebnisse können nachfolgend mechanische und thermische Richtprozesse ausgelegt werden.   The grinding process is a significant finishing process for components and allows for high surface quality. Due to the heat development at the ground surface, tensile residual stresses may be induced into the component, which in turn result in component distortions. In order to determine these unwanted properties, the research work presented here uses the finite element method to model mechanisms of action within the component. Using the simulation results, mechanical and thermal straightening processes can be designed.

Influence of bleaching and thermal straightening on endogenous GHB concentrations in hair: An in vitro experiment

2019 ◽  
Vol 297 ◽  
pp. 277-283 ◽  
Author(s):  
María del Mar Ramírez Fernández ◽  
Sarah M.R. Wille ◽  
Vincent Di Fazio ◽  
Nele Samyn
Keyword(s):  
Vitro Experiment ◽  
In Vitro Experiment ◽  
Thermal Straightening

Research for Straightening of TC4 Alloy Wire Rod Based on Horizontal-Vertical Roller System

2012 ◽  
Vol 192 ◽  
pp. 280-284
Author(s):  
Chao Zhang ◽  
Jian Chao Feng ◽  
Ming He Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Element Analysis ◽  
Alloy Wire ◽  
Wire Rod ◽  
Tc4 Alloy ◽  
Roller System ◽  
Thermal Straightening ◽  
New System ◽  
Vertical Roller

Straight TC4 wire rod is demanded by many industries, however the technology of straightening for it has not been solved. In the present paper, a horizontal-vertical roller thermal straightening system is designed and the theory of rolling reduction is concluded. Based on the new system and the rolling reductions calculated for each roller, the method of finite element analysis is used to show the process of straightening at 600°C. The result of straightening is ideal, which proves the straightening system is adequate for Φ4.5 TC4 wire rod.

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