scholarly journals High-Performance Methods for Welding Steel P460NL2

2021 ◽  
pp. 21-28
Author(s):  
Marcin Kempa
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Welded Joints ◽  
High Performance ◽  
Comparative Test ◽  
Test Results ◽  
Welding Steel

The article discusses comparative test results concerning two welding methods, i.e. SAW and MAG. The tests involved the making of welded joints in steel P460NL2, the verification of the chemical composition of supplied steel, the comparison of the quality of joints (in accordance with PN-EN ISO 5817) as well as the performance of macroscopic tests and the comparison of mechanical properties and hardness.

scholarly journals Experimental Study to Establish Compressive and Flexural Strength of High Performance Concrete (HPC) with Addition of Treated Cocos Nucifera Fiber

2018 ◽  
Vol 7 (2.23) ◽  
pp. 489
Author(s):  
Md Azree Othuman Mydin ◽  
Noridah Mohamad ◽  
Mohd Nasrun Mohd Nawi ◽  
Abdul Aziz Abdul Samad ◽  
Izwan Johari
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Cocos Nucifera ◽  
Mix Design ◽  
Control Specimen ◽  
Test Results ◽  
Fuel Ash ◽  
Axial Compressive Strength

This paper focuses on laboratory investigation to establish the mechanical properties of High Performance Concrete (HPC) of grade M60 with addition of treated cocos nucifera fiber (CNF) together with silica fume (SF) and pulverised fuel ash (PFA). There are 3 diverse mix designs of CNF strengthened concrete (CNFRC) were prepared accordingly. Foremost CNFRC deprived of any additive, subsequent CNFRC made by 10% replacement of cement mass with PFA, followed by arrangement of 10% of ordinary cement (by weight) was supplanted with SF. For respective mix design, CNF was included in the mix 0.5% from the total volume. Test results had indicated that by adding CNF lead to 3% decrease in axial compressive strength of the HPC which was due to dropping the quality of compaction. Through the axial compression test performed, the strength of CNFRC PFAC was about 8% greater associated to the control specimen as PFA by means of its globular element form. Moreover, the inclusion of fiber in the mix had develops the strength under flexure load of CNFRC, CNFRC SFC, CNFRC PFAC by about 10%, 8%, and 25% correspondingly.    

A Quantitative Evaluation of the Quality of Recycled Steel in Uganda

2012 ◽  
Author(s):  
C. Senfuka ◽  
J. B. Kirabira ◽  
J. K. Byaruhanga
Keyword(s):  
Mechanical Properties ◽  
Raw Material ◽  
Emission Spectrometry ◽  
Test Results ◽  
Geometrical Properties ◽  
Direct Reduced Iron ◽  
The Relationship ◽  
Recycled Steel ◽  
Made In

All steel made in Uganda is currently manufactured from scrap. Such steel has often been characterized by unpredictable performance in consonance with its inconsistent raw material inputs. This study evaluates and relates the mechanical, metallurgical and geometrical properties of these bars in order to identify the factors underlying the performance of the products from this steel and examine the relationship with their scrap content. In order to study the steels, tensile, torsion and micrographic tests have been carried out together with spark emission spectrometry on samples collected from different plants. The test results generally indicate impressive steel resilience, strength and metallographic properties in spite of relatively high and irregular carbon content. Limited weldability, uniaxiality of properties, uneven scatter of microelements and substantial non-uniformity of longitudinal mechanical properties have been observed. Rolling and post rolling defects have been noted. The geometric reliability of the bars has also been found generally low. Improvement of secondary refinement, use of direct reduced iron (DRI) diluent and more diligent sorting have suggested as solutions.

Cleanness and Mechanical Properties of Steel after Remelting under Different Slags by ESR

2014 ◽  
Vol 635 ◽  
pp. 112-117
Author(s):  
Alena Pribulová ◽  
Peter Futáš ◽  
Marianna Bartošová
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Sulphur Content ◽  
Metallic Inclusions ◽  
Change Chemical Composition

Quality of machine production is very close-knit with quality of metallurgical semi-products and with improvement their working properties. It can be achieved first of all by decrease of sulphur and non-metallic inclusions content in metal. Improvement of working properties provide remelted processes above an electro slag remelting (ESR). The slags play very important role by ESR process. By experiments steel with next chemical composition was used: C (0,9 – 1,1%), Mn (0,30 – 0,50%), Si (0,15 – 0,35%), Cr (1,30 – 1,65%), Ni (max.0,30%), Cu (max.0,25%), P (max.0,027%), S (max.0,030%). The steel was remelted under 8 types of slags on the base of CaO, Al2O3, CaF2 and SiO2 in different ratios. The contribution deals with influence of chemical composition of slag on mechanical properties and cleannes of metal after electro slag remelting. Variation of slag chemical composition enables to change chemical composition of remelted steel, to reduce the non-metallic inclusions and sulphur content and to improve the mechanical properties of steel.

Mechanical Properties of Welded Joints in Welding with Pulsed Arcs

2013 ◽  
Vol 379 ◽  
pp. 195-198 ◽  
Author(s):  
A.G. Krampit ◽  
N.Yu Krampit ◽  
M.A. Krampit
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Power Supply ◽  
Welded Joints ◽  
Arc Welding ◽  
Welded Joint ◽  
Pulsed Power ◽  
Pulsed Arc Welding ◽  
Pulsed Power Supply ◽  
Pulsed Arc

Research results of the weld chemical composition and mechanical properties at pulsed arc welding are discussed. It is established that the pulsed power supply favours mechanical properties of the welded joint.

scholarly journals Review on Friction Stir Processed TIG And Friction Stir Welded Dissimilar Alloy Joints

2019 ◽  
Author(s):  
Sipokazi Mabuwa ◽  
Velaphi Msomi
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Friction Stir Processing ◽  
Welded Joints ◽  
Aluminium Alloys ◽  
Knowledge Gap ◽  
Friction Stir ◽  
Dissimilar Alloys ◽  
The Status

There is an increase towards reducing the weight of structures through the use of aluminium alloys in different industries like aerospace, automotive, etc. This growing interest would lead towards using dissimilar aluminium alloys which would require welding. TIG and friction stir welding are the well-known techniques that are currently suitable for joining dissimilar aluminium alloys. The welding of dissimilar alloys has its own dynamics which impact on the quality of the weld. This then suggests that there should be a process which can be used to improve the dissimilar alloys welds post their production. Friction stir processing is viewed as one of the techniques that could be used to improve the mechanical properties of the material. This paper reports on the status and the advancement of FSW, TIG and FSP technique. It further looks at the variation use of FSP on TIG and FSW welded joints with the purpose of identifying the knowledge gap.

scholarly journals THE DEVELOPMENT OF THE NEW VZhM200 SUPERALLOY AND THE TECHNOLOGY OF ITS PRODUCTION FOR CASTING OF THE ADVANCED ENGINES’ BLADES BY THE DIRECTIONAL CRYSTALLIZATION

2021 ◽  
pp. 11-18
Author(s):  
P.G. Min ◽  
◽  
V.E. Vadeev ◽  
V.V. Kramer ◽  
◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Turbine Blades ◽  
Manufacturing Technology ◽  
Type Structure ◽  
Turbine Engines ◽  
Directional Crystallization ◽  
Metal Impurities ◽  
Nickel Based Superalloy

FSUE «VIAM» has developed a new nickel-based superalloy VZhM200 and its manufacturing technology for casting of turbine blades with directional (pillar-type) structure for advanced turbine engines. The advantages of the VZhM200 alloy over the DS200 Hf alloy are presented in the article. The quality of VZhM200 alloy produced by FSUE «VIAM» meets the DS200 Hf, MAR M200+Hf alloys produced by Cannon-Muskegon Corporation and HOWMET Ltd in chemical composition, content of harmful and non-metal impurities, gases and mechanical properties.

Exploring Possibilities of Implementation of Special Rutile Electrodes for Welding Microalloyed Steels

2016 ◽  
Vol 1138 ◽  
pp. 19-24
Author(s):  
Mihailo Mrdak ◽  
Nikola Bajić ◽  
Marko Rakin ◽  
Darko Veljić ◽  
Zoran Karastojković ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Weld Metal ◽  
Microalloyed Steel ◽  
Raw Materials ◽  
Microalloyed Steels ◽  
Test Results ◽  
Medium Thickness ◽  
Cored Wire ◽  
Ni Content

The paper presents test results of a new quality of a special rutile electrode, with a core of flux-cored wire made from local raw materials, based on analyzing mechanical properties and microstructure of the weld metal in MMA welding. The base metal for experimental welding was microalloyed steel marked J55 (thickness 7.0 mm) according to API Spec 5L standards (EN 10113-3. and JUS C.B0 502) which was produced in Smederevo steelworks. For experimental welding a special electrode IHIS E 35 R-2 was used, with a medium thickness rutile coating, a core of flux-cored wire and Ni content of 2.5%. The results of the analyzes indicate that the new quality special rutile electrode with the flux-cored wire core provides good structural and mechanical properties of weld metal in microalloyed steel welded joints.

Properties of VA/E/MMA Terpolymer Powder-Modified Mortars

2015 ◽  
Vol 1129 ◽  
pp. 169-176
Author(s):  
Sunhee Hong ◽  
Wan Ki Kim
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Cement Mortar ◽  
Mercury Porosimetry ◽  
Chloride Ion ◽  
Test Results ◽  
Polymer Powder ◽  
Chloride Ion Penetration ◽  
Redispersible Polymer Powder

This study is to examine and clarify the quality of polymer-modified mortars using a VA/E/MMA terpolymer powder as compared with polymer-modified mortars using a VAE copolymer powder. Polymer-modified mortars using general commercial redispersible polymer powders are prepared with various polymer-cement ratios, and tested for flexural and compressive strengths, tensile strength, water absorption, chloride ion penetration, carbonation and pore size distribution by mercury porosimetry. Overall, the properties of polymer-modified mortars using a VA/E/MMA terpolymer powder were superior to those of polymer-modified mortars using a VAE copolymer powder. And VA/E/MMA terpolymer powder-modified mortars showed significantly improved mechanical properties and durability in comparison with unmodified mortar. It is concluded from the test results that the modification of cement mortar with redispersible polymer powder improves the properties of unmodified mortar, and VA/E/MMA terpolymer powder has higher quality than VAE copolymer powder.

Influence of Metakaolin on Mechanical Properties of High-Performance Concrete

2010 ◽  
Vol 168-170 ◽  
pp. 1904-1909
Author(s):  
Bao Min Wang ◽  
Wei Liu
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
High Performance ◽  
High Performance Concrete ◽  
High Strength ◽  
Equal Mass ◽  
Test Results ◽  
Optimum Temperature ◽  
Compressive Strength Of Concrete ◽  
And Performance

Kaolin is a material with broad sources and a low price. Metakaolin is made from kaolin which is calcined, finely ground at an optimum temperature of 750 being kept constant for 4 hours. High strength and performance concrete can be mixed from metakaolin as a substitute for equal mass cement. The influences of 5%, 10% and 15% metakaolin in substitution of equal cement masses were studied on the mechanical properties of high-performance concrete. The test results showed that the addition of metakaolin improved the cubic compressive strength, splitting tensile strength and flexural strength of HPC, among which the improvement in compressive strength was the most siginificant, and simultaneously, there was also an improvement in concrete toughness in a certain degree. The optimum content of metakaolin is 10% resulting in an increase of the cubic compressive strength of concrete by 8.3% correspondingly.

scholarly journals INFLUENCE OF THE CHEMICAL COMPOSITION AND METHOD OF SMELTING ON THE PROPERTIES OF THE METAL OF WELDED JOINTS OF ECONOMICALLY ALLOYED CHROMIUM-MANGANESE-NICKEL STEELS

2021 ◽  
pp. 69-73
Author(s):  
O. P. Bondareva ◽  
E. V. Sedov ◽  
O. B. Kryuchkov ◽  
I. L. Gonik
Keyword(s):  
Mechanical Properties ◽  
Phase Composition ◽  
Chemical Composition ◽  
Grain Growth ◽  
Base Metal ◽  
Welded Joints ◽  
Austenitic Steels ◽  
Welding Cycle ◽  
Thermal Welding ◽  
Positive Effect

The results of studies on the influence of the chemical composition on mechanical properties of the base metal and the metal of the near-seam zone of welded joints of ferrite-austenitic steels are presented. The positive effect of microalloying of steels with calcium and cerium on the resistance to embrittlement of the metal after exposure to the thermal welding cycle is shown. It is established that alloying ferrite-austenitic steels with molybdenum and vanadium reduces the tendency to grain growth during welding heating, and doping with nitrogen leads to the stabilization of the phase composition of steels under the influence of elevated welding and operating temperatures.

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