Shielding gas brazing of martensitic stainless steel with copper free silver based filler metals

This paper deals with the effects of shielding gas mixtures (100% CO2, 100% Ar and 80 % Ar [Formula: see text] 20% CO[Formula: see text] and heat input (3.00, 3.65 and 4.33[Formula: see text]kJ/mm) on the mechanical and metallurgical characteristics of AISI 410[Formula: see text]S (American Iron and Steel Institute) super martensitic stainless steel (SMSS) by gas metal arc welding (GMAW) process. AISI 410[Formula: see text]S SMSS with 1.2[Formula: see text]mm diameter of a 410 filler wire was used in this study. A detailed microstructural analysis of the weld region as well as the mechanical properties (impact, microhardness and tensile tests at room temperature and 800[Formula: see text]C) was carried out. The tensile and impact fracture surfaces were further analyzed through scanning electron microscope (SEM). 100% Ar shielded welds have a higher amount of [Formula: see text] ferrite content and due to this fact the tensile strength of the joints is superior to the other two shielded welds.

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Effects of Ni and Co Additions to Filler Metals on Ag-Brazed Joints of Cemented Carbide and Martensitic Stainless Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.922.322 ◽

2014 ◽

Vol 922 ◽

pp. 322-327 ◽

Cited By ~ 10

Author(s):

Kengo Kaiwa ◽

Shinji Yaoita ◽

Tomohiro Sasaki ◽

Takehiko Watanabe

Keyword(s):

Stainless Steel ◽

Joint Strength ◽

Martensitic Stainless Steel ◽

Braze Alloy ◽

Cemented Carbide ◽

Suppression Effect ◽

Brazed Joints ◽

Co Addition ◽

Multiple Addition ◽

Filler Metals

This study focuses on understanding the effect of Ni and Co additions to filler metals on Ag-brazed joints of cemented carbide and martensitic stainless steel. Ni and Co added braze alloys were processed based on Ag-Cu-Zn ternary alloy, and joint strength and microstructure of the brazed layer has been investigated. The joint strength increased by the 2.0mass%Ni and 0.5mass%Co addition into braze alloy. This trend is remarkable in the Co added alloy, and the brazed joint increased by 141% compared to that in no-added alloy. The joint strength was closely related to the suppression effect of Co dissolution from cemented carbide into filler layer and Fe diffusion from the stainless steel to the brazed layer. In the brazed microstructure, Co-depleted zone caused by dissolution of Co in the cemented carbide was observed near the interface between the cemented carbide and the steel. Width of the Co-depleted zone significantly decreased in the Co added alloy. However, the joint strength decreased in the multiple addition compared to that in the single addition of Ni or Co.

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Boron and phosphorous free nickel-based filler metals for brazing stainless steel in shielding gas furnaces

International Journal of Materials Research (formerly Zeitschrift fuer Metallkunde) ◽

10.3139/146.110549 ◽

2011 ◽

Vol 102 (8) ◽

pp. 964-971 ◽

Cited By ~ 2

Author(s):

Friedrich-Wilhelm Bach ◽

Kai Möhwald ◽

Ulrich Holländer ◽

Jörg Schaup ◽

Andre Langohr ◽

...

Keyword(s):

Stainless Steel ◽

Shielding Gas ◽

Filler Metals

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Tensile Properties of Martensitic Stainless Steel Weldments

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.23.319 ◽

2007 ◽

Vol 23 ◽

pp. 319-322 ◽

Cited By ~ 5

Author(s):

R. Yilmaz ◽

Ali Türkyilmazoglu

Keyword(s):

Stainless Steel ◽

Stainless Steels ◽

Arc Welding ◽

Martensitic Stainless Steel ◽

Shielding Gases ◽

Gas Composition ◽

Shielding Gas ◽

Martensitic Stainless Steels ◽

Gas Tungsten Arc ◽

Microhardness Profile

In this study, AISI 420 martensitic stainless steels were welded by GTAW (gas tungsten arc welding) using ER 316L consumables. Pure argon, argon + 25% He and argon + 5% N2 were used as shielding gases. The obtained results indicated that shielding gases have some effect on the properties of the martensitic stainless steel weldments. The use of argon+5%N2 provides the highest tensile strength values and higher microhardness profile compared to the other shielding gas composition used.

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Effect of Ni on the Properties of a Laser Surface-Clad Fe-Based Alloy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.2035 ◽

2013 ◽

Vol 750-752 ◽

pp. 2035-2039 ◽

Cited By ~ 1

Author(s):

Xiu Ying Yang

Keyword(s):

Stainless Steel ◽

Great Reduction ◽

Martensitic Stainless Steel ◽

Electrochemical Corrosion ◽

Small Variation ◽

Weight Fraction ◽

Laser Surface ◽

H2so4 Solution ◽

Shielding Gas ◽

Ni Content

Two Fe-based alloys , Fe-15Cr-5Ni and Fe-16Cr-7Ni (wt. %), with a small variation in the Ni content were fabricated on a martensitic stainless steel 1Cr13 substrate by laser surface cladding (LSC) using a CO2 laser and Ar shielding gas that was blown into a moten pool. Both LSC alloys exhibited typical rapid directional solidification structures. However, 2 wt% Ni increase led to ~9% increase in the weight fraction of austenite, and ~5% increase in the area proportion of interdendritic regions which contained the higher Cr contents. These microstructural changes caused a great reduction in the microhardness and great improvements in the resistance to electrochemical corrosion in 0.5M H2SO4 solution. The reasons for these differences are discussed in detail.

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