Slag-metal reactions during welding: Part II. Theory

1991 ◽  
Vol 22 (1) ◽  
pp. 73-81 ◽  
Author(s):  
U. Mitra ◽  
T. W. Eagar
Keyword(s):  
Welding Part ◽  
Slag Metal Reactions

Slag-metal reactions during welding: Part III. Verification of the Theory

1991 ◽  
Vol 22 (1) ◽  
pp. 83-100 ◽  
Author(s):  
U. Mitra ◽  
T. W. Eagar
Keyword(s):  
Welding Part ◽  
Slag Metal Reactions

Slag-Metal Reactions in Submerged Arc Welding:An Overview

1997 ◽  
Vol 30 (2) ◽  
pp. 35
Author(s):  
Zuruzi Bin Abu Samah ◽  
R. S. Chandel ◽  
T. Sritharan
Keyword(s):  
Slag Metal Reactions ◽  
Submerged Arc

scholarly journals Studies on the Hygiene of the Arc-welding : (Part 2) The Effect of the Thermal Stress on Producing Dust during Arc-welding

Sangyo Igaku ◽  
1967 ◽  
Vol 9 (9) ◽  
pp. 698-700
Author(s):  
Shinji AKASHI ◽  
Akira NUKADA ◽  
Akira MATUDA ◽  
Tadashige MORI ◽  
Masana OGATA
Keyword(s):  
Thermal Stress ◽  
Arc Welding ◽  
Welding Part

scholarly journals Kinetics of slag-metal reactions.

1986 ◽  
Vol 25 (4) ◽  
pp. 267-273
Author(s):  
Hidetake Ishikawa ◽  
Ryoji Arima ◽  
Yasuji Kawai
Keyword(s):  
Slag Metal Reactions ◽  
Kinetics Of

Dynamic Fracture Toughness Testing for Welding Part of Nuclear Piping Using Normalization Data Reduction Technique

2006 ◽  
Vol 306-308 ◽  
pp. 73-78
Author(s):  
Yong Huh ◽  
Hyung Ick Kim ◽  
Chang Sung Seok
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Data Reduction ◽  
Dynamic Test ◽  
Dynamic Fracture Toughness ◽  
Reduction Technique ◽  
Fracture Toughness Test ◽  
Static Test ◽  
Welding Part ◽  
Data Reduction Technique

In this study, we performed the static test of nuclear piping materials by the unloading compliance method and the normalization data reduction technique and obtained two fracture resistance curves (J-R curves). The two curves were similar, which proves that the normalization data reduction technique can be adopted in the static test. Then we performed the dynamic fracture toughness test for welding part of nuclear piping. The J-R curves were obtained from the dynamic test by the normalization data reduction technique and were compared to those of the static test results.

scholarly journals OPTIMALISASI DESAIN DAN POSISI JIG WELDING GUNA MENGURANGI SPATTER PADA PRODUKSI HALF OUTER COMP MENGGUNAKAN METODE DMAIC

2019 ◽  
Vol 4 (2) ◽  
pp. 94-103
Author(s):  
Zulkani Sinaga ◽  
Achmad Muhazir ◽  
Muhamad Ilham Fuadi
Keyword(s):  
Software Tool ◽  
Spare Part ◽  
Observation Data ◽  
Production Department ◽  
Welding Part ◽  
Measure Analysis ◽  
Additional Support ◽  
Final Inspection ◽  
Dmaic Method

ABSTRAKPenelitian ini dilakukan pada salah satu produsen spare part otomotif PT. XYZ memiliki permasalahan dan menjadi perhatian serius pada bagian pengelasan adanya produk cacat yang dapat menurunkan nilai dan kualitas produk sehingga banyak produk yang ditolak oleh konsumen karena tidak sesuai dengan standar, dimana banyak terdapat kotoran las (Spatter) yang menmpel pada Joint Exhaust produk Half Outer Comp merupakan bagian komponen dari knalpot sehingga mengurangi produktifitas produksi pada bagian inspeksi akhir, permasalahan di atas dianggap perlu dilakukan penelitian untuk mencari penyebab hal tersebut. Beberapa langkah dilakukan guna memperbaiki cacat yang ada yaitu langkah awal dilakukan observasi dan wawancara ke bagian produksi, metode yang digunakan untuk pengolahan data hasil observasi menggunakan metode DMAIC (Define, Measure, Analisys, Improve, Control), kemudian dilakukan optimalisasi dan modifikasi Jig Welding dengan mendesain ulang menggunakan perangkat software Solidwork versi 2018, kemudian mengubah posisi Jig sebelumnya vertikal menjadi horizontal agar supaya pada saat pengelasan Spatter tidak langsung jatuh ke Joint Exhaust dan memberikan penahan tambahan pada Jig guna mengurangi jumlah Spatter menempel pada Half Outer Comp. Pada penelitian ini diperoleh hasil dimana jumlah Spatter yang menempel pada Joint Exhaust sangat berkurang dan memperoleh hasil produk yang lebih baik sehingga meningkatkan produktivitas pada bagian inspeksi akhir sebelumnya 58,33% menjadi sebesar 83.33%.  Kata Kunci :  Optimalisasi, Spatter, DMAIC, Desain, Solidwork 2018 ABSTRACTThis research was conducted at one of the automotive spare part manufacturers PT. XYZ has a problem and is a serious concern on the welding part of the presence of defective products that can reduce the value and quality of the product so that many products are rejected by consumers because it does not comply with standards, where there is a lot of welding dirt (Spatter) which attaches to the Joint Exhaust Half Outer Comp product is a component of the muffler so as to reduce production productivity at the final inspection, the above problems are considered necessary to do research to find the cause of it. Several steps were taken to correct existing defects, namely the initial steps carried out observation and interviews to the production department, the method used for processing the observation data using the DMAIC method (Define, Measure, Analysis, Improve, Control), then optimization and modification of Jig Welding with redesign using the 2018 Solidwork software tool, then changing the position of the previous vertical jig to horizontal so that when welding Spatter does not directly fall into the Joint Exhaust and provide additional support to the Jig to reduce the number of Spatter attached to the Half Outer Comp. In this study the results obtained where the number of Spatter attached to the Joint Exhaust is greatly reduced and obtain better product results thereby increasing productivity in the previous final inspection section of 58.33% to 83.33%. Keywords : Optimization, Spatter, DMAIC, Design, Solidwork 2018

scholarly journals A Study on Fiber Laser Welding of High-Manganese Steel for Cryogenic Tanks

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1536
Author(s):  
Jaewoong Kim ◽  
Jisun Kim ◽  
Changmin Pyo
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Yield Strength ◽  
Laser Welding ◽  
Base Material ◽  
Manganese Steel ◽  
High Manganese ◽  
Fiber Laser Welding ◽  
High Manganese Steel ◽  
Welding Part

As the environmental regulations on ship emissions by the International Maritime Organization (IMO) become stricter, the demand for a ship powered by liquefied natural gas (LNG) is rapidly increasing worldwide. Compared to other materials, high-manganese steel has the advantages of superior impact toughness at cryogenic temperatures, a low thermal expansion coefficient, and a low-cost base material and welding rod. However, there is a limitation that the mechanical properties of a filler material are worse than those of a base material that has excellent mechanical properties. To solve these shortcomings, a basic study was performed to apply fiber laser welding with little welding deformation and no filler material to high-manganese steel. The relationship between laser welding parameters and penetration shapes was confirmed through cross-section observation and analysis by performing a bead on plate (BOP) test by changing laser power and welding speed, which are the main parameters of laser welding. In addition, the welding performance was evaluated through mechanical property tests (yield strength, tensile strength, hardness, cryogenic impact strength) of a welding part after performing the high-manganese steel laser butt welding experiment. As a result, it was confirmed that the yield strength of a high-manganese steel laser welding part was 97.5% of that of a base metal, and its tensile strength was 93.5% of that of a base metal.

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