Investigation on the Bonding Strength between the Hard Alloy Cladding Layer and the Steel Substrate

2004 ◽  
Vol 471-472 ◽  
pp. 136-139
Author(s):  
Fu Tian Liu ◽  
S.X. Song ◽  
Jun Ru Yang ◽  
Wei Ling Huang ◽  
Zhao Qian Li
Keyword(s):  
Liquid Phase ◽  
Hard Alloy ◽  
Bonding Strength ◽  
Steel Substrate ◽  
Liquid Phase Sintering ◽  
Steel Plates ◽  
Tensile Fracture ◽  
Cladding Layer ◽  
Ternary Boride ◽  
Cladding Material

By virtue of the technology characteristics of liquid-phase sintering ternary boride hard alloy cladding material, two steel plates were bonded together by a ternary boride hard alloy cladding material through a liquid phase sintering procedure. The bonding strength between a hard alloy cladding layer and a steel substrate was characterized by means of measuring the bonding strength of two steel plates bonded by the hard alloy cladding layer. The bonding strength between hard alloy cladding layer and the steel substrate was measured by transverse rupture strength method, tensile fracture method and single side shear method, respectively. The results show that a firm metallurgical bonding is formed during the liquid phase sintering.

Thermal Shock Properties of Ternary-Boride-Based Cladding Material

2007 ◽  
Vol 353-358 ◽  
pp. 58-61
Author(s):  
Y.G. Wang ◽  
Zhao Qian Li ◽  
Ming Chen
Keyword(s):  
Thermal Shock ◽  
Fatigue Failure ◽  
Steel Substrate ◽  
Cladding Layer ◽  
Obvious Change ◽  
Ternary Boride ◽  
Cladding Material

Thermal shock properties of Q235A steel used ternary-boride-based (TBB) cladding material has been studied. The result indicates that this cladding material has excellent resistance to thermal shock and that the cracks are not difficult to occur at the interface of cladding layer and steel substrate. The mechanism of thermal shock failure is fatigue failure brought by cycle stresses. The thermal shock has little influence on the hardness of cladding layer. The structure of cladding layer has no obvious change after the thermal shock, but the phase of steel substrate change from ferrite and pearlite to martensite.

Interaction of Components of Co-Sn and Co-Sn-Cu Powder Materials in Liquid Phase Sintering

2019 ◽  
Vol 943 ◽  
pp. 113-118
Author(s):  
Evgeniy Georgiyevich Sokolov ◽  
Alexander Vitalyevich Ozolin ◽  
Lev Ivanovich Svistun ◽  
Svetlana Alexandrovna Arefieva
Keyword(s):  
Liquid Phase ◽  
Solid Phase ◽  
Steel Substrate ◽  
Liquid Phase Sintering ◽  
Powder Materials ◽  
Cu Alloys ◽  
Initial Stage ◽  
Interaction Of Components ◽  
Sintered Alloys ◽  
Liquid Tin

The interaction of components and structure formation were studied in liquid phase sintering of Co-Sn and Co-Sn-Cu powder materials. The powders of commercially pure metals were mixed with an organic binder and applied on the steel substrate. Sintering was performed under vacuum at temperatures of 820 and 1100 °C. The structure of sintered alloys was investigated by X-ray diffractometry and electron probe microanalysis, and microhardness (HV0.01) of the structural components was measured. It has been found that the nature of interaction of the liquid tin with the solid phase at the initial stage of sintering affects the formation of structure and porosity of Co-Sn and Co-Sn-Cu alloys considerably. In Co-Sn alloys, diffusion of tin into cobalt particles leads to the formation of intermetallic compounds, which hinders spreading of the liquid phase. This results in a porous defect structure formed in Co-Sn alloys. In Co-Sn-Cu alloys, at the initial stage of sintering the liquid phase enriched with copper is formed that wets the cobalt particles and contributes to their regrouping. As a result of this, materials with minor porosity are formed.

Phase Structure and Microstructure of the Interface between WC Steel Bond Hard Alloy and Carbon Steel

2008 ◽  
Vol 368-372 ◽  
pp. 1606-1608
Author(s):  
Shi Zhong Wei ◽  
Yan Li ◽  
Jian Ping Gao ◽  
Ying Ping Ji ◽  
Rui Long
Keyword(s):  
Liquid Phase ◽  
Carbon Steel ◽  
Hard Alloy ◽  
Phase Structure ◽  
Composite Layer ◽  
Liquid Phase Sintering ◽  
Hard Phase ◽  
Explosive Compaction ◽  
Metallurgical Bonding ◽  
Structure And Microstructure

WC steel bond hard alloy powders were compacted by explosive compaction on the surface of carbon steel, then the composite layer was prepared by liquid-phase sintering in vacuum. The phases and microstructures of the interface of composite layer were observed by SEM, EDS, TEM. Result showed that the thickness of the interface was about 30μm, and the elements of W, Cr, C were detected in the interface. The structures of the interface were pearlites which were composed of the layered tablets of M23C6 and ferrite. The layered tablets were perpendicular to the interface. The structures were the pearlites and ferrites in the side of the carbon steel near the interface but globular carbides, whose phase is W3Fe3C, and pearlites in side of steel bond hard alloy. During sintering at 1623K, all elements of metal-powder and C, V, which were decomposed by hard-phase, interdiffused in the interface. The multiple carbides were found in the interface and steel bond hard alloy. As a result, the powders formed into compact alloy by itself, and at the same time there was a good metallurgical bonding between the carbon steel and the hard alloy.

scholarly journals The Effect of Transient Liquid Phase on the Joining Process of Aluminum Foam Core Sandwiches

2016 ◽  
Vol 16 (1) ◽  
pp. 48-58
Author(s):  
A. T. Tabrizi ◽  
M. Azadbeh
Keyword(s):  
Liquid Phase ◽  
Bonding Strength ◽  
Energy Dispersive Spectrometry ◽  
Transient Liquid Phase ◽  
Liquid Phase Sintering ◽  
Bending Test ◽  
Recent Developments ◽  
Al Foam ◽  
Joining Process ◽  
Mathematical Relations

Abstract Despite recent developments in sandwich panels production technology, there are some difficulties in joining core sandwiches. Liquid Phase Sintering is a conventional method to increase the density of powder metallurgy parts. In this paper, we applied LPS as a joining process between Al-foam and Al-metal by using Al-mixture powders with different compositions as the interlayer. At first stage, Al-Zn powder mixture was used and the possibility of this process was investigated. At later stages, we tried to increase the joint bonding strength with different Al-mixture powder compositions. 3-point bending test was applied and by using mathematical relations, bonding strengths were calculated. The highest bonding strength was obtained, about 9 kPa, when Al-Zn-Mg was used as the interlayer. Also energy dispersive spectrometry (EDS) was used to investigate the diffusion of additive elemental powders to Al-mixture powders.

Development of High Strength Mo2NiB2 Ternary Boride Base Cermets Produced by Reaction Boronizing Sintering

2007 ◽  
Vol 539-543 ◽  
pp. 803-808 ◽  
Author(s):  
Kenichi Takagi ◽  
Yuji Yamasaki ◽  
Koro Hirata
Keyword(s):  
Mechanical Properties ◽  
Liquid Phase ◽  
Rupture Strength ◽  
High Strength ◽  
Liquid Phase Sintering ◽  
Sintering Behavior ◽  
Mass Model ◽  
Transverse Rupture Strength ◽  
Ternary Boride

The effects of V substitution for Cr to the sintering behavior of Cr containing Mo2NiB2 ternary boride base cermets and Mn addition to the mechanical properties and microstructure of the Cr and V containing cermets were investigated by using Ni-5.0B-51.0Mo-(17.5-x)Cr-xV (mass%) and Ni-5.0B-51.0Mo-12.5Cr-5.0V-(0-1.5)Mn (mass%) model cermets. 10mass%V substitution for Cr in the Cr containing cermets markedly improved transverse rupture strength and hardness from 2.27 to 2.94GPa and from 85.3 to 87.2RA respectively and refined the microstructure by retarding the progress of sintering especially at liquid phase sintering stage. Small amount of Mn addition to the Cr and V containing Mo2NiB2 base cermets significantly improved the sinterability and increased the mechanical properties of the cermets.

The Influence of Heat Treatment on the Interface and Properties of Mo2FeB2 Cermets-Steel Clad Material

2014 ◽  
Vol 541-542 ◽  
pp. 199-203 ◽  
Author(s):  
Jun Song Peng ◽  
Ying Jun Pan ◽  
Heng Zhang
Keyword(s):  
Heat Treatment ◽  
Raw Materials ◽  
Steel Substrate ◽  
Liquid Phase Sintering ◽  
Interface Area ◽  
Distribution Of Elements ◽  
Before And After ◽  
Material Grain Size ◽  
Cladding Material

Using B, Mo, and Fe powders as raw materials, Mo2FeB2 cermets-steel clad material has been prepared on steel 45 substrate by means of in-situ reaction vacuum and liquid phase sintering technology, and the influence of heat treatment on microstructure and properties has been studied. The influence of heat treatment on microstructure, and distribution of elements of the cladding-substrate bonding interface area has been investigated by SEM, EDS. Results show that there is an excellent metallurgic bonding between the cladding layer and steel substrate both before and after heat treatment, and heat treatment not only brings the cladding material grain size and microstructure refinement but also increases the thickness of the transition layer.

Research on Properties of Ternary Boride Hard Alloy Materials Added Nickel and Chromium

2006 ◽  
Vol 532-533 ◽  
pp. 408-411
Author(s):  
Wei Ling Huang ◽  
Fu Tian Liu ◽  
Wen Hu Li ◽  
Chuan Zhen Huang ◽  
Zhao Qian Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Hard Alloy ◽  
Alloy Powder ◽  
Raw Materials ◽  
Liquid Phase Sintering ◽  
Green Body ◽  
Optimal Temperature ◽  
Alloy Material ◽  
Ternary Boride ◽  
Different Content

Using Mo powder, B-Fe alloy powder and Fe powder as raw materials, adding Ni and Cr respectively, with proper forming additives, the green body is formed by coining. The ternary boride hard alloy material is fabricated by liquid phase sintering technology. The influence of different content of Cr and Ni on mechanical properties is studied respectively. The optimal content of Cr and Ni and the optimal temperature are found.

Study on Mechanical Properties of Cermet Materials Fabricated from Ternary Boride Cladding on Both Sides Surface of Steel Substrate

2006 ◽  
Vol 315-316 ◽  
pp. 406-410 ◽  
Author(s):  
Wei Ling Huang ◽  
Fu Tian Liu ◽  
Chuan Zhen Huang ◽  
Zhao Qian Li ◽  
F. Dong
Keyword(s):  
Alloy Powder ◽  
Bending Strength ◽  
Raw Materials ◽  
Steel Substrate ◽  
High Hardness ◽  
Liquid Phase Sintering ◽  
Good Corrosion Resistance ◽  
Spray Method ◽  
Ternary Boride ◽  
Cermet Materials

Using Mo powder, B-Fe alloy powder and Fe powder as raw materials, with proper forming additives, the slurry was prepared. The green body was formed by spray method on both sides of 16Mn and Q235 steel substrate separately. Both side ternary boride based cermet cladding materials FC-V16Mn and FC-VCuQ235 were fabricated by liquid phase sintering technology. Both materials have high hardness, bending strength and good corrosion resistance.

Effect of furnace atmosphere and silica content on the consolidation behaviour of magnesia partially stabilised zirconia

1990 ◽  
Vol 48 (4) ◽  
pp. 1056-1057
Author(s):  
J. Drennan ◽  
R.H.J. Hannink ◽  
D.R. Clarke ◽  
T.M. Shaw
Keyword(s):  
Liquid Phase ◽  
Silica Content ◽  
Liquid Phase Sintering ◽  
Furnace Atmosphere ◽  
Boundary Phase ◽  
Analytical Electron ◽  
Analytical Electron Microscope ◽  
Series Of Experiments ◽  
Compositional Gradients ◽  
Mobile Liquid

Magnesia partially stabilised zirconia (Mg-PSZ) ceramics are renowned for their excellent nechanical properties. These are effected by processing conditions and purity of starting materials. It has been previously shown that small additions of strontia (SrO) have the effect of removing the major contaminant, silica (SiO2).The mechanism by which this occurs is not fully understood but the strontia appears to form a very mobile liquid phase at the grain boundaries. As the sintering reaches the final stages the liquid phase is expelled to the surface of the ceramic. A series of experiments, to examine the behaviour of the liquid grain boundary phase, were designed to produce compositional gradients across the ceramic bodies. To achieve this, changes in both silica content and furnace atmosphere were implemented. Analytical electron microscope techniques were used to monitor the form and composition of the phases developed. This paper describes the results of our investigation and the presentation will discuss the work with reference to liquid phase sintering of ceramics in general.

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