Study on Copper and Copper Alloy’s Manual SHS Welding Technology

2011 ◽  
Vol 80-81 ◽  
pp. 96-99
Author(s):  
Li Feng Qu ◽  
Wen Tong Xin ◽  
Yong Sheng Wu ◽  
Sen Wang
Keyword(s):  
Melting Point ◽  
Welding Process ◽  
Slag System ◽  
Chemical Compositions ◽  
High Melting Point ◽  
Temperature Synthesis ◽  
High Deformation ◽  
Welding Technology ◽  
High Temperature Synthesis ◽  
Lower Melting Point

Copper and copper alloy’s manual self-propagating high-temperature synthesis (SHS) technology was introduced in this paper. Through research of weld and analysis of manual SHS welding process, mechanism of copper and copper alloy’s manual SHS welding is expounded. This type of weld rod was only operated in terms of some welding technology, including welding method, weld technique parameter, weld operate. The chemical compositions of the weld rod was the key to the final weld quality. The powders include thermit, slagging elements and alloying addition. When the content of (CuO+Al) was 60%wt~80% in the thermit, the rod showed excellent combustion behavior and the test plates H62 were welded successfully.The slag system of CaO-Al2O3-SiO2 have the lower melting point and high deformation power, which fit to meet the need of the weld slag system of copper and copper alloy’s manual SHS welding. The high melting point Al2O3 can be digested and absorbed in two ways, generating CuO·Al2O3 ceramics and reducing the melting point to float upward into slag with the help of the solvent.

Mechanism and Experimental Research on Copper and Copper Alloy's Manual SHS Welding Technology

2011 ◽  
Vol 314-316 ◽  
pp. 923-926
Author(s):  
Li Feng Qu ◽  
Wen Tong Xin ◽  
Yong Sheng Wu ◽  
Sen Wang
Keyword(s):  
Melting Point ◽  
Welding Process ◽  
Slag System ◽  
Chemical Compositions ◽  
High Melting Point ◽  
Temperature Synthesis ◽  
High Deformation ◽  
Welding Technology ◽  
High Temperature Synthesis ◽  
Lower Melting Point

Copper and copper alloy are more difficult to weld than steel in terms of many reasons. As a new technolsgy, copper and copper alloy’s manual self-propagating high-temperature synthesis (SHS) technology was introduced in this paper. Through research of weld and analysis of manual SHS welding process, mechanism of copper and copper alloy’s manual SHS welding is expounded. This type of weld was only researched in terms of some aspects, including welding method, weld technique parameter, weld operate technique. The chemical compositions of the weld rod was the key to the final weld quality. The powders include thermit, slagging elements and alloying addition. When the content of (CuO+Al) was 60%wt~80% in the thermit, the rod showed excellent combustion behavior and the test plates H62 were welded successfully. The slag system of CaO-Al2O3-SiO2 have the lower melting point and high deformation power, which fit to meet the need of the weld slag system of copper and copper alloy’s manual SHS welding. The high melting point Al2O3 can be digested and absorbed in two ways, generating CuO•Al2O3 ceramics and reducing the melting point to float upward into slag with the help of the solvent.

scholarly journals Preparation of Ferrotitanium Using Ilmenite with Different Reduction Degrees

Metals ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 962 ◽  
Author(s):  
Zixian Gao ◽  
Gongjin Cheng ◽  
He Yang ◽  
Xiangxin Xue ◽  
Jongchol Ri
Keyword(s):  
Melting Point ◽  
Aluminum Content ◽  
Synthesis Method ◽  
Al2o3 Content ◽  
Reduction Degree ◽  
High Melting Point ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
Al Powder ◽  
Constant Addition

The effect of ilmenite with different reduction degrees on the production of ferrotitanium, using a self-propagation high-temperature synthesis method with aluminum as the reducing agent, was investigated. Increasing the degree of reduction not only contributed to lower consumption of aluminum, but also lowered the oxygen content and improved the grades of titanium and iron in the ferrotitanium. The aluminum content of the ferrotitanium increased with an increase in the extent of reduction of ilmenite, so the Al2O3 content formed in the slag decreased with the constant addition of CaO and CaF2 to the Al powder. This decreased relatively the content of high-melting-point CaAl12O19 and increased the contents of low-melting-point CaAl2O4 and CaF2 in the slag, thereby promoting the separation of ferrotitanium and slag. Improving the reduction degree of ilmenite is beneficial to the preparation of ferrotitanium.

Mechanical Properties and Microstructure of SS400 Friction Stir Welds Pursuant to Welding Distance

2011 ◽  
Vol 399-401 ◽  
pp. 273-276
Author(s):  
Kwang Jin Lee ◽  
Hyun Kuk Park ◽  
Sang Hyuk Kim ◽  
Hyun Kuk Park ◽  
Ik Hyun Oh
Keyword(s):  
Mechanical Properties ◽  
Melting Point ◽  
Abrasion Resistance ◽  
Industrial Development ◽  
Welding Process ◽  
High Strength ◽  
High Melting ◽  
High Melting Point ◽  
Friction Stir ◽  
Metallic Compounds

FSW have advantage as defect such as porosity, metallic compounds decrease than other welding process. So, FSW was researched about low melting point materials. However, welding of high melting point and high strength materials attract attention because of high mechanical properties was needed due to industrial development. In this study, FSW is enforced using the kind of high melting point materials as SS400(SPHC). However, the tool must have super heat-resisting and abrasion resistance. So, WC-X%Co tool was manufactured by SPS method. The result, welding is successfully practice using WC-X%Co tool to 50m without fracture of tool.

Phase Formation and Thermodynamic Analysis of Self-propagating High-temperature Synthesis Al–Zr–N System Composites

1998 ◽  
Vol 13 (9) ◽  
pp. 2610-2613 ◽  
Author(s):  
Kexin Chen ◽  
Changchun Ge ◽  
Jiangtao Li
Keyword(s):  
High Temperature ◽  
Melting Point ◽  
Phase Formation ◽  
Combustion Temperature ◽  
Xrd Analysis ◽  
The Self ◽  
Composite Ceramics ◽  
Temperature Synthesis ◽  
High Temperature Synthesis ◽  
The Relationship

The self-propagating high temperature synthesis (SHS) of Al–Zr–N system composite ceramics was investigated in this paper. The melting point of Al was low (Tm = 660 °C), while that of Zr was high (Tm =1855 °C). Therefore, Al will melt and coalesce during reaction, which inhibit diffusion of nitrogen from outside the metal compact to interior due to collapse of the pore openings, while Zr will not melt under the combustion temperature which is lower than its melting point. It will not affect the permeation of nitrogen under the conditions. Accordingly, the ratio of Al and Zr in the initial mixed powders will affect the permeation of nitrogen from outside the sample to the interior, which results in different phase formation of the products. In this study, the relationship between the combustion parameters and the phase formation of the products will be experimentally determined through XRD analysis, and then thermodynamically analyzed.

Joining of Q235 Low-Carbon Steel Plates by Friction Stir Welding With AA2A12 Strip As an Auxiliary Solder

2019 ◽  
Author(s):  
Peng Zhang ◽  
Shengdun Zhao ◽  
Peng Dong ◽  
Yongfei Wang ◽  
Chao Chen ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Melting Point ◽  
Welded Joint ◽  
Low Carbon Steel ◽  
Welding Process ◽  
Steel Plates ◽  
Low Carbon ◽  
Micro Hardness ◽  
High Melting Point ◽  
Friction Stir

Abstract This article proposed a novel friction stir welding process to weld high melting point alloy plates with low melting point alloy strip as auxiliary solder to reduce the wear of the friction stir welding tool and extend its service life, and feasibility of this process was evaluated. An AA2A12 strip was clamped to the gap between two Q235 low-carbon steel plates as an auxiliary solder before welding, then a joint with excellent surface quality and smooth weld edge transition was obtained by friction stir welding process in which the tool was made of low-cost material tungsten-carbide. Macrostructure, microstructure and fracture surface of the joints were investigated by optical microscope and scanning electron microscope. The tensile tests were conducted to evaluate the mechanical properties of the joint at rotational speed of 800 r/min, traverse speed of 50 mm/min, with plunge depth and probe offset of 0.1 mm. The tensile strength of the joint was 108.9 MPa at room temperature what proved the feasibility of the novel way we proposed. The micro-hardness value of the cross section of the welded joint is M-shaped from the AS to the RS, and gradually decrease from the top plane to the bottom plane. There is a certain relationship between the welding process parameters and the macroscopic morphology, micro-hardness and mechanical properties of the welded joint. Hence, the method we proposed has high innovation, and economy, high value of scientific research and industrial application, and provides a new idea about friction stir welding of high melting point alloys.

Hardening of metal surface via self-propagating high-temperature synthesis in thin films

2007 ◽  
Vol 43 (4) ◽  
pp. 239-242
Author(s):  
S. Kh. Suleimanov ◽  
O. A. Dudko ◽  
V. G. Dyskin ◽  
Z. S. Settarova ◽  
M. U. Dzhanklych
Keyword(s):  
Thin Films ◽  
High Temperature ◽  
Metal Surface ◽  
Temperature Synthesis ◽  
High Temperature Synthesis

CRM MOLYBDENUM-50 RHENIUM

Alloy Digest ◽  
1970 ◽  
Vol 19 (12) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Melting Point ◽  
Physical Properties ◽  
Heat Treating ◽  
Electrical Contacts ◽  
High Melting ◽  
High Melting Point ◽  
Temperature Performance

Abstract CRM MOLYBDENUM-50 RHENIUM is a high-melting-point alloy for applications such as electronics tube components, electrical contacts, thermionic converters, thermocouples, heating elements and rocket thrusters. All products are produced by powder metallurgy. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Mo-11. Producer or source: Chase Brass & Copper Company Inc..

CRM RHENIUM

Alloy Digest ◽  
1970 ◽  
Vol 19 (8) ◽  
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Powder Metallurgy ◽  
Melting Point ◽  
Heat Treating ◽  
Electrical Contacts ◽  
High Melting ◽  
High Melting Point ◽  
Temperature Performance ◽  
Commercially Pure

Abstract CRM RHENIUM is a commercially pure, high-melting-point metal for applications such as electronics tube components, electrical contacts, thermionic converters, thermocouples, heating elements and rocket thrusters. All products are produced by powder metallurgy. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Re-1. Producer or source: Chase Brass & Copper Company Inc..

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