scholarly journals Evaluation of Stainless Steel AISI 316Ti Corner Joints Quality Produced by Tungsten Inert Gas Welding

TEM Journal ◽  
2020 ◽  
pp. 1475-1479
Author(s):  
Dominika Botkova ◽  
Frantisek Botko ◽  
Zuzana Mitalova ◽  
Vladimir Simkulet ◽  
Maros Somsak
Keyword(s):  
Stainless Steel ◽  
Welded Joint ◽  
Welding Current ◽  
Inert Gas ◽  
Optimal Conditions ◽  
Tungsten Inert Gas Welding ◽  
Additional Material ◽  
Steel Aisi ◽  
Stainless Steel Aisi

Welding is one of the most common ways of creating permanent joints in various industries. It is important to constantly look for ways to increase the quality of welds and look for optimal conditions to achieve a quality joint. The presented article is focused on the evaluation of the quality of weldments made of AISI 316Ti material created by TIG technology with additional material and without additional material. The parameter that changed was the welding current. HV hardness measurements and macroscopic weld evaluation were used to evaluate the quality of the welded joint.

scholarly journals Electric current effect on mechanical properties of SMAW-3G on the stainless steel AISI 304

2018 ◽  
Vol 197 ◽  
pp. 12003
Author(s):  
Edi Widodo ◽  
Iswant Iswanto ◽  
Mirtza Adi Nugraha ◽  
Karyanik Karyanik
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Tensile Test ◽  
Electric Current ◽  
Welding Process ◽  
Welding Current ◽  
Test Results ◽  
Aisi 304 ◽  
Steel Aisi ◽  
Stainless Steel Aisi

Parameters in the welding need to be known because the effect on the mechanical properties of the material after the welding process. This research purposes to find out the influence of variation of SMAW welding current on Stainless Steel AISI 304, with variation of electric current equal to 70A, 80A and 90A.The electrode of AWS A5.4 E308-16 with diameter of 2.6 mm is used. Dye penetrant test, tensile test and metallographic test applied to analysis the characteristic. Based on data from tensile test results obtained the highest value on the specimen welding current 90A is equal to 632 MPa. The lowest tensile strength value recorded on the specimens of current 70A is 498.66 MPa.

Laser Welding of Stainless Steel 321 in Different Welding Positions

2021 ◽  
Vol 313 ◽  
pp. 106-117
Author(s):  
A. Bernatskyi ◽  
O.M. Berdnikova ◽  
V. Sydorets ◽  
Valery Kostin ◽  
O. Kushnarova
Keyword(s):  
Stainless Steel ◽  
Laser Welding ◽  
Welded Joints ◽  
Mechanical Characteristics ◽  
Welded Joint ◽  
Chemical Elements ◽  
Vertical Position ◽  
Steel Aisi ◽  
Aisi 321 ◽  
Stainless Steel Aisi

It was revealed that spatial position during laser welding of AISI 321 stainless steel influences the processes in the weld pool and the process of its crystallization. The geometry, structure, distribution of chemical elements depend on the cooling rate of the welded joint, which varies in different spatial positions during laser welding of stainless steel AISI 321. To achieve the lowest variance of results and the maximum values of mechanical characteristics of the welded joints of AISI 321 stainless steel it is recommended to produce laser welding in a vertical position.

Effects of Shielding Gas Pureness on Quality of Orbital TIG Welded Austenitic Stainless-Steel Joints

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Jacek Górka ◽  
Bernard Wyględacz ◽  
Marcin Żuk
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Flow Rate ◽  
Gas Flow ◽  
Welded Joint ◽  
Relative Pressure ◽  
Delta Ferrite ◽  
Additional Material ◽  
Technology Institute

Aim of this research was determination of effects of shielding and backing gas pureness on quality of welded joints produced from austenitic stainless-steel grade X5CrNi18-10 (1.4301) pipes Ø 50.8 x 1.5 mm by orbital TIG welding without use of additional material. In the case of stainless steel, it is of importance not only to prepare shielding of the molten metal pool but as well protection of welded joint root from oxygen, which causes formation of colorful oxide layers. Presence of oxidized layer primarily decreases corrosion resistance of stainless-steel. Performed examination included: chemical composition of welded join material, delta ferrite testing, non-destructive joint testing, visual testing with discoloration assessment from face and root side (acc. to Danish Force Technology Institute report 93.34 and American ASME BPE-2012 norm), radiographic testing, destructive welded joint testing. Metallurgical shielding of the welded joint face was produced with Argon 5.0 pure, with a flow rate of 8 dm3/min. Root of welded joint was at first protected with Argon 5.0 pure, then argon-atmospheric air mixtures were used. Backing gas flow rate was set to achieve a relative pressure of 300 Pa. Quantity of residual oxygen in gas mixture was selected based on Danish Force Technology Institute report 93.34.

Fabrication of (MnxCo1-x)3O4 Coated Stainless Steel AISI 430 by Electrodeposition with AC+DC Signals

2017 ◽  
Vol 728 ◽  
pp. 117-122 ◽  
Author(s):  
Panya Wiman ◽  
Thublaor Tummaporn ◽  
Opat Witthayarungruengsri ◽  
Thamrongsin Siripongsakul
Keyword(s):  
Stainless Steel ◽  
Alloy Coating ◽  
Solid Oxide ◽  
Oxide Scales ◽  
Electrodeposition Technique ◽  
Steel Aisi ◽  
Alternative Current ◽  
Aisi 430 ◽  
Stainless Steel Aisi

A ferritic stainless steel (FSS) AISI 430 coated by (MnxCo1-x)3O4 spinel has been intensively studied for its potential in application as an interconnect of a solid oxide fuel cell (SOFC). In this study, in order to develop fabrication of (MnxCo1-x)3O4 coatings, Mn-Co coatings on AISI 430 by an electrodeposition technique was adopted. The electric direct current (DC) and alternative current (AC) modulated DC (AC+DC) signals were utilized to drive voltage levels for electrodeposition. By varying the duty of the AC+DC signals from 25 % to 50 %, the ratio of Mn and Co composition in the coating changed, consequently by this technique it is possible to adjust the composition of binary alloy coating. The fabricated coatings also exhibited different morphologies indicating nucleation and grain growth process of various oxide scales of Mn-Co. The oxidation behavior is also investigated to evaluate the quality of the coatings.

scholarly journals Formability Prediction of Laser-Welded Stainless Steel AISI 304 and AISI 430

Metals ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 54
Author(s):  
Emil Evin ◽  
Miroslav Tomáš
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Laser Welding ◽  
Welded Joint ◽  
Base Material ◽  
Coarse Grained ◽  
Aisi 304 ◽  
Steel Aisi ◽  
Aisi 430 ◽  
Stainless Steel Aisi

The effect of laser welding on the mechanical properties and the prediction of formability for austenitic stainless steel AISI 304 and ferritic steel AISI 430 when welded by a YLS-5000 fiber laser, were studied in the paper. The microstructure of the welded joint was analyzed using light microscopy. The mechanical properties were determined by static tensile testing. The forming limit diagrams were produced from notched samples at R5, R17, and R25 mm. The hardness values of the welded joint and the base material were determined using the Vickers method. Samples made of AISI 430 showed that the formability suffered due to laser welding. Longitudinal coarse ferrite grains were observed in the microstructure of the AISI 430 weld metal. The coarse-grained structure of the welded joint and the continuous interface along the centerline caused the failure of the AISI 430 laser-welded samples at significantly lower actual stress and strain values than were required to break the base material. No significant changes in the formability were observed in the AISI 304 samples after laser welding. The growth of dendrites was observed in the microstructure of the AISI 304 welded joint in a direction towards the centerline of the welded joint. A comparison of the experimentally determined FLD0 values and the values calculated from predictive equations showed that a better agreement was achieved for uniform elongation than for the strain hardening exponent. The manufacturability and economic efficiency of selected parts of an exhaust system by hydromechanical drawing were evaluated on the basis of the process capability index Cpk.

AL TECH MIAMI

Alloy Digest ◽  
1983 ◽  
Vol 32 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Heat Treating ◽  
Good Resistance ◽  
Aisi Type ◽  
Steel Aisi ◽  
Resistance To Wear ◽  
Specialty Steel ◽  
Stainless Steel Aisi ◽  
Plastic Mold

Abstract AL TECH MIAMI is both a hardenable stainless steel (AISI Type 420) and a tool steel for making molds for plastic. A major requirement for plastic mold steel is corrosion resistance. Certain plastics, such as poly-vinyl chlorides, are very corrosive and stored molds often rust from sweating water lines and/or humid environments. AL TECH MIAMI has good resistance to wear. It is melted and AOD refined to assure the mold-maker of cleanliness and freedom from internal imperfections. It provides exceptionally good polishability for lens-quality molds. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-435. Producer or source: AL Tech Specialty Steel Corporation.

scholarly journals Influence of Activated Fluxes on the Bead Shape of A-TIG Welds on Carbon and Low-Alloy Steels in Comparison with Stainless Steel AISI 304L

Metals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 530
Author(s):  
Jerzy Niagaj
Keyword(s):  
Stainless Steel ◽  
Penetration Depth ◽  
High Strength ◽  
Tig Welding ◽  
Low Alloy Steels ◽  
Aisi 304L ◽  
A Tig Welding ◽  
Alloy Steels ◽  
Steel Aisi ◽  
Stainless Steel Aisi

The article presents results of comparative A-TIG welding tests involving selected unalloyed and fine-grained steels, as well as high-strength steel WELDOX 1300 and austenitic stainless steel AISI 304L. The tests involved the use of single ingredient activated fluxes (Cr2O3, TiO2, SiO2, Fe2O3, NaF, and AlF3). In cases of carbon and low-alloy steels, the tests revealed that the greatest increase in penetration depth was observed in the steels which had been well deoxidized and purified during their production in steelworks. The tests revealed that among the activated fluxes, the TiO2 and SiO2 oxides always led to an increase in penetration depth during A-TIG welding, regardless of the type and grade of steel. The degree of the aforesaid increase was restricted within the range of 30% to more than 200%.

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