Time filter

Source Type

Zhao H.,Xian Tianli Clad Metal materials Co. | Li P.-C.,Xian Tianli Clad Metal materials Co. | He X.-S.,Xian Tianli Clad Metal materials Co.
Suxing Gongcheng Xuebao/Journal of Plasticity Engineering | Year: 2011

The impact property of the clad plate decreased obviously after prepared by explosive welding. The microstructure of the material before and after explosive welding were investigated employing optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results indicate that mass of dislocation in large quantities emerge in the grain of the material after explosive welding, so increases and the impact property of material decreases distinctly. Employing suitable heat treatment, the density of dislocation in the grain can be decreased and the impact property of the clad plate under low temperature can be increased obviously.


Zhao H.,Xian Tianli Clad Metal Materials Co. | Zhou Y.,Xian Tianli Clad Metal Materials Co. | Li P.,Xian Tianli Clad Metal Materials Co. | Huang Z.,Xian Western Titanium Technologies Co.
International Journal of Materials Research | Year: 2012

In this paper, Gr5 alloy and 304 stainless steel were joined by explosive welding. In order to improve the bond strength of the clad plates, a thin (2 mm) titanium sheet was introduced as an interlayer between Gr5 and SS 304. Accordingly, microstructure, hardness, tensile-shearing, and bending tests were evaluated in detail. Optical microscopy and scanning electron microscopy revealed that the interface between Gr5 alloys and the interlayer shows a slightly wavy morphology. The interface between the interlayer and SS304 shows a wavy structure. No distinctive separation, crack, or tear were observed in both interfaces. Line scan results indicate that there is no diffusion area at both bonding interfaces. Also, tensile-shearing and bending tests results showed that the bonding is acceptable. © 2012 Carl Hanser Verlag GmbH & Co. KG.


Zhang L.-J.,Xi'an Jiaotong University | Pei Q.,Xi'an Jiaotong University | Zhang J.-X.,Xi'an Jiaotong University | Bi Z.-Y.,China National Petroleum Corporation | Li P.-C.,Xian Tianli Clad Metal Materials Co.
Materials and Design | Year: 2014

In this study, microstructural inhomogeneity and mechanical properties of explosive welded 2205 stainless steel/X65 pipe steel bimetallic sheets were investigated. The explosion-bonded 2205/X65 bimetallic sheets had good shear strength. The tensile shear fracture primarily occurred in the interior of X65 material and primarily exhibited dimple morphology. Fine crystal grains in the 0.5-2. μm range were found all over the narrow localized melted zone near the 2205/X65 interface, whereas a coarse columnar crystal structure growing along the perpendicular direction to the interface formed in the wider localized melted zone. Quasi-cleavage fracture morphology was observed in the coarse columnar crystal region after the stratified tensile test. The junction of the three regions near the interface with large differences in morphology was the weak point in the bimetallic sheet, where Y-shaped cracking easily occurred under a loading force. Stratified tensile test and micro-hardness tests for the explosively welded bimetallic sheet showed that severe hardening occurred in the 2205 cladding, and the most severe metal hardening occurred near the interface. Tests for 45° face bending and root bending tests were conducted under extreme conditions. The results showed that voids were prone to appeared in the peninsula and island morphologies near the interface. © 2014 Elsevier Ltd.


Zhao H.,Xian Tianli Clad Metal Materials Co. | Huang Z.,Western Metal Material Co. | Li P.,Xian Tianli Clad Metal Materials Co. | Cui J.,Northeastern University China
Magnesium Technology | Year: 2010

An organic coating was proposed as the interlayer between electroless plating and an AZ31 magnesium alloy substrate, to replace the traditional HF pretreatment plus chromium oxide coating. When the reaction of electroless plating started, particles reduced in the bath deposited directly onto the interlayer surface. The interlayer not only reduced the corrosion of magnesium during the plating process, but also reduced the potential differences between the matrix and the second phase of magnesium alloy. The result of the cross-cut test indicated that adhesion between the substrate and the interlayer was good enough. Silver, copper or nickel-phosphorus film could be deposited on the surfaces of AZ31 magnesium alloy by using this method. The morphology of the deposited films were investigated by using scanning electron microscopy (SEM) and energy dispersive X-ray analysis on plated substrates. The deposited films had rather perfect dense structures. In addition, the method proposed in this work is environmentally friendly: no fluoride or hexavalent chromium compounds are used. Additionally, the method provides a new concept for plating the metals which are considered difficult to plate due to high reactivity.


Zhao H.,Xian Tianli Clad Metal Materials Co. | Huang Z.,Xian Western Titanium Technologies Co. | Li P.,Xian Tianli Clad Metal Materials Co. | Zhou Y.,Xian Tianli Clad Metal Materials Co. | Wang H.,Xian Tianli Clad Metal Materials Co.
International Journal of Materials Research | Year: 2010

In this paper, Incoloy800 and 304 stainless steel (SS304) were clad by explosive welding. Accordingly, hardness, tensile strength, shearing strength, bending properties and microstructure of the clad plates were evaluated. The bonding interface showed a wavy morphology. Line scanning results indicated that there was no diffusion area through the bonding interface. Whereas, a colorful zone was observed at the wave ridge of the base metal (white area in optical microscopy and black area in scanning electronic microscopy). Energy dispersive spectroscopy analysis indicated that compositions and contents of the colorful zone were the same as that in the base metal. Hardness testing showed that the highest value of hardness was obtained in the colorful zone. Thus, the colorful zone was an intensive deformation area in SS304, which was produced by shock pressure from collision. Mechanical tests showed that the clad plate was acceptable according to ASTM specification. © Carl Hanser Verlag GmbH & Co. KG ISSN 1862-5282.


Zhao H.,Xi;an Tianli Clad Metal Materials Co. | Li P.,Xi;an Tianli Clad Metal Materials Co. | Zhou Y.,Xi;an Tianli Clad Metal Materials Co. | Huang Z.,Xian Western Titanium Technologies Co. | Wang H.,Xi;an Tianli Clad Metal Materials Co.
Journal of Materials Engineering and Performance | Year: 2011

In this article, Incoloy800 and SS304 (304 stainless steel) were cladded by explosive welding. Accordingly, micro-hardness, tensile strength, shearing strength, bending properties, and SEM microstructure of cladding plate were examined in detail. The bonding interface of the plate showed a wavy morphology. Whereas, a different colorful area was observed at the wave ridge of the base layer either in optical or SEM pictures. Magnetic inspection showed that the colorful area was austenitic steel. Thus, the occurrence of the colorful areas seemed to be the result from the high deformation/cold working of the grains.EDX spectrum analysis and line scanning indicated that the diffusion through the bondinginterface was not observed under the EDX and line scanning detection limitation. Micro-hardness, tensile, shearing, and bending testing results showed that the bonding strengthwas acceptable according to ASTM specification. © ASM International.

Loading Xian Tianli Clad Metal Materials Co. collaborators
Loading Xian Tianli Clad Metal Materials Co. collaborators