Resistance Welding by Inserting Wires between Joint Interfaces

2007 ◽  
Vol 127 ◽  
pp. 343-347
Author(s):  
Takeshi Terajima ◽  
Toshio Kuroda
Keyword(s):  
Stainless Steel ◽  
Melting Point ◽  
Base Material ◽  
Resistance Welding ◽  
Joint Interface ◽  
Base Materials ◽  
Steel Wires ◽  
Material Temperature ◽  
Type 316L Stainless Steel

Butt resistance welding of super duplex stainless steel by inserting type 316L stainless steel wires was investigated. When the base material temperature was increased from room temperature to 1100 oC at the heating rate of 550 oC /sec, base materials were jointed through the insert wires and HAZ (heat affected zone) of the joint interface were less than 80 μm. In this joining technique, the insert wires played a role of concentrating current on the wires and increasing their temperature up to melting point or near melting point. When the welding was performed at a load of 10 N, the insert wires consisted of ferrite and austenite growing along the ferrite grain boundary. When the welding was performed at a load of 70N, insert wire remained austenite. That is because the contact resistance between insert wire and base materials at 70 N was lower than that of 10 N, and consequently the insert wire were not adequately heated.

Precise Resistance Welding with Wire Insert

2007 ◽  
Vol 539-543 ◽  
pp. 3900-3905
Author(s):  
Takeshi Terajima ◽  
Toshio Kuroda
Keyword(s):  
Stainless Steel ◽  
Melting Point ◽  
Base Material ◽  
Resistance Welding ◽  
Joint Interface ◽  
Base Materials ◽  
Steel Wires ◽  
Material Temperature ◽  
Wire Insert

Butt resistance welding of super duplex stainless steel type 329J4L with inserting type 316L stainless steel wires was investigated. When the base material temperature was increased from room temperature to 1373 K at the heating rate of 550 K /sec, base materials were jointed through the insert wires. HAZ (heat affected zone) of the joint interface were less than 80 μm. In this jointing technique, the insert wires played an important role of concentrating current on the wires and increasing their temperature up to melting point or near melting point. Thermal analysis using thermography revealed that insert wires were adequately heated just after current started at a load of 10 N. When the welding was performed at a load of 70 N, joint area was increased by plastic deformation of the base material. That led to decrease of current concentration. Consequently insert wires were jointed in the solid state.

Mechanism Analysis and Dairy Filtration Experimental Research on Porous 1Cr18Ni9 Stainless Steel Components

2013 ◽  
Vol 668 ◽  
pp. 902-906
Author(s):  
Xiu Ping Dong ◽  
Ya Ting Huang ◽  
Ming Ji Huang
Keyword(s):  
Stainless Steel ◽  
Porous Material ◽  
Three Dimensional ◽  
Porous Metal ◽  
Chocolate Milk ◽  
Mechanism Analysis ◽  
Steel Wires ◽  
Before And After ◽  
Filtering Efficiency

Cool-drawn 1Cr18Ni9 stainless steel wires of 0.1~0.5 mm can be woven and punched to prepare porous metal filters. There is certain amount of connected micron pores in the transformable components. Filtration mechanism of this porous material is investigated and three series of samples with different diameter of wires, porosities and filtrating ranges are prepared. Filtration performances compares experiments are carried out on a kind of chocolate milk with the brand of Sanyuan. Three-dimensional microscopy, KEYENCE VHX-600, is applied to investigate the diaphragms before and after filtrating. Portable contamination analysis kit, HPCA-2, is chosen to identify the degree of contaminating. Results indicate that these kind of porous metal filters have valid solid/fluid separating effects. Wires diameters and other preparation parameters will identify the porosity. Thinner wires contribute to more and tinier porous and will block particles effectively. Thickness of filters plays the similar role of filtration layer. Higher porosity will increase the cleanliness of the passing fluid and decrease the filtering efficiency. The data in this paper provide technical support to the application in dairy filtration industry.

Effect of Brazing and Heat Treatment Cycle on the Mechanical Properties of Base Materials

2015 ◽  
Vol 830-831 ◽  
pp. 310-313
Author(s):  
N. Dileep Kumar ◽  
K. Thomas Tharian ◽  
Aby Isaac ◽  
P.V. Venkitakrishnan
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Grain Growth ◽  
Braze Alloy ◽  
Base Material ◽  
Growth Patterns ◽  
Outer Shell ◽  
Liquid Oxygen ◽  
Gas Generator ◽  
Base Materials

Brazing is extensively used in liquid rocket engines for realizing various subsystems. In the case of cryogenic engines, brazing operation is done to realize the gas generator. Gas Generator is one of the major systems of cryogenic engine. It generates and supplies hot gases required for running turbine of main turbo pump. This uses liquid oxygen and gaseous hydrogen as propellant combination. Combustion chamber of Gas Generator is of double walled construction with the cylindrical outer shell of transition class ICSS-0716-301 austenitic-martensitic stainless steel and inner shell of ICSS-1218 321, aTi stabilized austenitic stainless steel material brazed together with Fe-Ni-Mn type braze alloy at a temperature of 1180°C. This temperature can cause the grain growth and related issues to the base material. Thus the present work focuses on the effect of the brazing/thermal cycle on mechanical properties and microstructure of the base materials in post braze condition. The results obtained on metallurgical/mechanical behavior of the material showed the different grain growth patterns in inner and outer shell materials. This helped in understanding the effect of brazing condition on the changes in mechanical properties of base materials.

Brazing of Aluminum Bimetallic Sheets in the Design of Heat Exchangers

2013 ◽  
Vol 814 ◽  
pp. 19-24
Author(s):  
Ionel Olaru
Keyword(s):  
Heat Transfer ◽  
Melting Point ◽  
Heat Exchangers ◽  
Filler Metal ◽  
Base Material ◽  
Base Materials ◽  
High Durability ◽  
Brazed Joint ◽  
Good Heat ◽  
Efficient Realization

Present heat exchangers should ensure very good heat transfer while having as small size, high durability and the optimum performance at low prices. Thus to achieve these goals is used as base material, aluminum in various forms, of which can be made the heat exchangers energetic efficient. Realization of aluminum heat exchangers can be properly with present requirements using the brazing joint elements. Brazing achieved joining with temperature for two base materials using a filler metal with a melting point above 450°C. A properly brazed joint is performed with a metallurgical connection between two or more metals, which is generally as strong as or stronger than the base metal used.

Manufacturing and Oxidation Property of Steel and Ti Metal Fibers

2005 ◽  
Vol 475-479 ◽  
pp. 273-276
Author(s):  
Dong Bok Lee ◽  
T.H. Kim ◽  
J.H. Ko
Keyword(s):  
Stainless Steel ◽  
Melting Point ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Steel Fibers ◽  
The Core ◽  
Steel Wires ◽  
Sheath Material

Stainless steel and Ti metal fibers having a diameter of 3 µm were produced from wires by multiple extrusions. The suitable sheath coating for stainless steel to extrude the core wires to fibers was the Cu coating having ~30 µm thickness. Zinc was not a suitable sheath coating, because Zn of the low melting point had diffused into the stainless steel wires during extrusion. The oxidation of stainless steel fibers produced using the Cu sheath coating oxidized rapidly above 750°C due to the high surface area of fibers. The utilization of the Cu coating as a sheath material to extrude the core Ti wires to fibers was not possible, because the highly reactive Ti wires resisted deforming to fibers.

BRILLIANT 2101 T-1 AP

Alloy Digest ◽  
2012 ◽  
Vol 61 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Tensile Properties ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Good Balance ◽  
Steel Wires

Abstract Stoody AP stainless steel wires are all-position wires. The nickel in this product will achieve a good balance of austenite and ferrite in lean duplex stainless steels. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on forming and joining. Filing Code: SS-1118. Producer or source: Stoody Company.

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