Aisi M2
Mostrando 1-12 de 97 artigos, teses e dissertações.
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1. Synthesis of New Phenolic-Schiff Base and Its Application as Antioxidant in Soybean Biodiesel and Corrosion Inhibitor in AISI 1020 Carbon Steel
New Schiff base compound N, N’-bis-(4-hexadecanate)-salicylethylenediamine (named IM) was synthesized, and characterized via infrared and nuclear magnetic ressonance spectroscopies. IM was tested as corrosion inhibitor and antioxidant in soybean biodiesel. Corrosion studies were developed with AISI 1020 carbon steel in a three-step accelerated corrosion as
J. Braz. Chem. Soc.. Publicado em: 2020-03
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2. EXTRATO DE HIBISCO-COLIBRI COMO INIBIDOR VERDE DE CORROSÃO DO AÇO-CARBONO EM ÁCIDO SULFÚRICO
For this work, a hydroalcoholic extract was prepared from the aerial parts of the Malvaviscus arboreus (Malvaceae) species, popularly known as hibisco-colibri in Brazil; and then, investigated by infrared and NMR spectroscopy. A class of special metabolites containing a porphyrin skeleton and pyrrole units was determined by typical absorption spectra, mainly
Quím. Nova. Publicado em: 26/08/2019
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3. Glycerol Effect on the Corrosion Resistance and Electrodeposition Conditions in a Zinc Electroplating Process
Zinc electrodeposition is an economical process of Zn coating compared to conventional galvanic process. The galvanizing process is used in various industrial sectors to protect ferrous alloys during the corrosion process. In buildings, the galvanizing process is widely used to coat mortar protective screens. The electrodeposition of zinc has a relatively lo
Mat. Res.. Publicado em: 19/08/2019
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4. Investigation of Austenitic Stainless Steel Coatings on Mild Steel Produced by Friction Surfacing Using a Conventional CNC Machining Center
The friction surfacing process allows deposition of similar and dissimilar coatings in the solid state, avoiding some of the problems associated with conventional coating methods in which fusion is involved. In the present work, a viability assessment of producing AISI 304 austenitic stainless steel coatings on AISI 1020 low-carbon steel substrates using a m
Mat. Res.. Publicado em: 21/01/2019
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5. Heat Treatment of Sintered Valve Seat Inserts
The characterization of sintered valve seat inserts (VSIs) after being subjected to different heat treatment operations has been carried out. The VSIs were obtained from three different alloys by mixing iron powder with AISI M3:2, AISI M2 high-speed steels, and AISI D2 tool steel. After sintering, the VSI were quenched in air followed by double tempering at
Mat. Res.. Publicado em: 02/08/2018
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6. Study of the Corrosive Behavior of the AISI 1020 Steel in Acid Crude Oil by Microscopic Techniques (LM, AFM and SEM/EDX) and Raman Spectroscopy
Microscopic techniques were combined to study the influence of corrosion rate on the morphologic behavior of AISI 1020 steel specimens submitted to thermal degradation of a typical acid crude oil (total acid number (TAN) = 2.1390 mg KOH g-1 and total sulfur (S) = 0.7778 wt.%). The techniques used were light microscopy (LM), scanning electron microscopy/energ
J. Braz. Chem. Soc.. Publicado em: 2018-08
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7. HVOF-sprayed Coating Over AISI 4140 Steel for Hard Chromium Replacement
The replacement of electrolytic hard chrome (EHC) by high velocity oxy-fuel (HVOF) sprayed coatings is investigated due to the toxicity of EHC process. The wear behavior of AISI 4140 steel coated by HVOF-, EHC-process was compared to quenched and tempered (Q&T) steel using a pin-on-disc apparatus. The wear tests were conducted at room temperature, 10 N appli
Mat. Res.. Publicado em: 28/05/2018
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8. Estudo da obtenção do Regime Permanente de Desgaste em ensaios de desgaste micro-abrasivo por esfera rotativa conduzidos em corpos-de-prova de WC-Co P20 e aço-ferramenta M2
RESUMO Desde a sua inserção junto à comunidade científica de tribologistas, o ensaio de desgaste micro-abrasivo por esfera rotativa vem sendo adotado por renomadas universidades e centros de pesquisas. Neste tipo de experimento, um fenômeno tribológico importante que deve ser observado e, considerado, refere-se à obtenção do Regime Permanente de Des
Matéria (Rio J.). Publicado em: 05/03/2018
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9. Cu-Sn Coatings Produced Using Environmentally Non-Aggressive Electrolyte Containing Sodium Tartrate
This work proposes the production of Cu-Sn alloy coatings with anticorrosive properties, using an environmentally non-aggressive bath. The coatings were electrodeposited on carbon steel substrate AISI 1020 using an electrolyte containing CuCl2 and SnCl2, and sodium tartrate as the complexant agent. The produced coatings were characterized by scanning electro
Mat. Res.. Publicado em: 27/11/2017
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10. Effect of Boride Layer on PM HSS AISI M2 on the Mechanisms Acting in the Transverse Rupture Strength Test
Herein, it was conducted a study in order to examine the main fracture characteristics in the transverse rupture strength test (TRS) of a high speed steel (HSS) AISI M2 produced by powder metallurgy (PM) and with boriding treatment. Four conditions have been studied: as-sintered, borided, normalized and borided + TiN. The TRS tests were conducted in accordan
Mat. Res.. Publicado em: 06/11/2017
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11. Micro-Scale Abrasive Wear Testing of CrN Duplex PVD Coating on Pre-Nitrided Tool Steel
Specific wear rates were calculated from a series of micro-scale abrasive tests by means of the calotte-grinding method. The tested material was a CrN coating deposited by arc evaporation on ion-nitrided AISI H13 steel. Characterizations included: phase analysis, chemical composition, metallography, microhardness, micro-scratch resistance and nano-indentatio
Mat. Res.. Publicado em: 22/06/2017
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12. Investigation of borided layers contribution on the wear resistance and adhesion of TiN coatings
ABSTRACT The purpose of the investigation was to examine the possibility of improving tool life by reducing the wear effect and improving the adhesion of a thin film through a compound configuration that consists in boriding and PVD deposition. Single layer coatings of TiN were deposited by PVD (cathodic arc) on quenched and tempered and on borided powder me
Matéria (Rio J.). Publicado em: 02/05/2017