1-20 of 435 Search Results for

shielding molten

Sort by
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003623
EISBN: 978-1-62708-182-5
... Abstract Corrosion resistance can usually be maintained in the welded condition by balancing alloy compositions, shielding molten and hot metal surfaces, and choosing the proper welding parameters. This article describes some of the metallurgical factors that affect corrosion of weldments...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005591
EISBN: 978-1-62708-174-0
..., wherein an external gas is supplied to shield the arc, and molding shoes are used to confine the molten weld metal for vertical-position welding. This article describes the fundamentals, temperature relations, consumables, metallurgical and chemical reactions, and process development of ESW. The problems...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005580
EISBN: 978-1-62708-174-0
... the strength and toughness properties of the weld joint. For this reason, the various arc welding processes provide some means for covering the arc and the molten pool with a protective shield of gas, vapor, or slag. This is referred to as arc shielding. Arc shielding may be accomplished by various techniques...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001354
EISBN: 978-1-62708-173-3
... current GAS-METAL ARC WELDING (GMAW) is an arc welding process that joins metals together by heating them with an electric arc that is established between a consumable electrode (wire) and the workpiece. An externally supplied gas or gas mixture acts to shield the arc and molten weld pool...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005601
EISBN: 978-1-62708-174-0
... the insolubility of nitrogen in liquid steel causes it to boil out and create gross surface porosity. The columnar flow of shielding gas, typically CO 2 or blends of argon and CO 2 , protects the molten weld pool from atmosphere in the same manner as in the GMAW process. Additional protection from the intrusion...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001336
EISBN: 978-1-62708-173-3
... shape and shielding gas composition in the GTAW process. arc welding cathode tip shape electron discharge gas tungsten arc welding heat transfer nonthermionic emission shielding gas composition thermionic emission THE GAS-TUNGSTEN ARC WELDING (GTAW) process is performed using a welding...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001340
EISBN: 978-1-62708-173-3
... tension thermal conductivity THE SHIELDING GAS used in a welding process has a significant influence on the overall performance of the welding system. Its primary function is to protect the molten metal from atmospheric nitrogen and oxygen as the weld pool is being formed. The shielding gas also...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005597
EISBN: 978-1-62708-174-0
...-shielded flux cored arc welding shielding gas THE SHIELDING GAS used in a welding process has a significant influence on the overall performance of the welding system. Its primary function is to protect the molten metal from atmospheric nitrogen and oxygen as the weld pool is being formed...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005572
EISBN: 978-1-62708-174-0
... established between a consumable wire electrode and the workpiece to be joined. Heat from the electric arc melts the continuously fed metal wire and the metal workpiece surface to deposit a weld bead. An externally supplied gas or gas mixture acts to shield the arc and molten weld pool from the atmosphere...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005646
EISBN: 978-1-62708-174-0
... weld that produces coalescence of metals with metal in the weld bead. It is measured by the E molten slag that melts the ller metal and percentage of base metal or previous weld edge- ange weld A ange weld with two mem- the surfaces of the workpieces. The weld metal in the weld bead. pool is shielded...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001356
EISBN: 978-1-62708-173-3
... a means of shielding the arc and molten metal. The major components of a typical welding torch are shown in Fig. 3 . Fig. 3 Schematic showing exploded view of key components comprising a GTAW manual torch Welding torches rated at less than 200 A are normally gas-cooled...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001371
EISBN: 978-1-62708-173-3
... of the work to be welded. Confined by cooling shoes, the molten weld pool is shielded by the molten slag, which moves along the full cross section of the joint as welding progresses. The conductive slag is maintained in a molten condition by its resistance to electric current passing between the electrode...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006515
EISBN: 978-1-62708-207-5
... compared to those of helium. Argon also provides better arc-starting characteristics and improved cleaning action with ac. Argon is approximately 1.4 times heavier than air, so it displaces air, resulting in excellent shielding of the molten weld pool. Helium Helium has an ionization potential...
Image
Published: 31 October 2011
Fig. 3 Plot of heat-transfer efficiency to base metal versus electrode speed for 0.89 mm (0.035 in.) diameter steel electrode in an Ar-2% O 2 shield gas. Total heat-transfer efficiency is shown partitioned into arc and molten drop components. Power supply open-circuit voltage, E O , is 32 V More
Image
Published: 01 January 1993
Fig. 2 Plot of heat-transfer efficiency to base metal versus electrode-speed for 0.89 mm (0.035 in.) diameter steel electrode in an Ar-2% O 2 shield gas. Total heat-transfer efficiency is shown partitioned into arc and molten drop components. Power supply open-circuit voltage, E 0 , is 32 V More
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005590
EISBN: 978-1-62708-174-0
... materials. Torch Construction and Electrodes The welding torch holds the tungsten electrode that conducts the current to the arc, and it provides a means of shielding the arc and molten metal. The major components of a typical welding torch are shown in Fig. 16 . Fig. 16 Schematic showing...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001335
EISBN: 978-1-62708-173-3
... conditions. Fig. 2 Plot of heat-transfer efficiency to base metal versus electrode-speed for 0.89 mm (0.035 in.) diameter steel electrode in an Ar-2% O 2 shield gas. Total heat-transfer efficiency is shown partitioned into arc and molten drop components. Power supply open-circuit voltage, E 0...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005621
EISBN: 978-1-62708-174-0
... of heat-transfer efficiency to base metal versus electrode speed for 0.89 mm (0.035 in.) diameter steel electrode in an Ar-2% O 2 shield gas. Total heat-transfer efficiency is shown partitioned into arc and molten drop components. Power supply open-circuit voltage, E O , is 32 V; contact tube-to-base...
Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.9781627081740
EISBN: 978-1-62708-174-0
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001484
EISBN: 978-1-62708-173-3
... utilizes the traditional plasma gases plus a secondary gas that forms a shield around the plasma arc. The torch design provides special passages for this secondary gas. The functions of the secondary gas are to: Assist the plasma in blowing away molten metal Enable faster and cleaner cuts...