Guisheng ZOU
,
Jun YANG
,
Aaiping WU
,
Genghua HUANG
,
Deku ZHANG
,
Jialie REN
,
Qing WANG
材料科学技术（英）
Ti foil and Ti/Ni/Ti multiple interlayers were selected for the bonding of tungsten to copper and CuCrZr alloy. The effects of processing conditions on the microstructures and shear strength of the joints were investigated. When Ti foil is used for bonding of tungsten to pure copper but not transformed into liquid solution during the holding time, the strength of the joints is relatively low because of the multiple compound layers with brittleness formed in the bonding zone. The strength of the joints increases significantly if the Ti foil is transformed into liquid solution and is mostly extruded out of the bonding zone. The same phenomena are found in the case when Ti/Ni/Ti multi-interlayers are used for bonding tungsten to CuCrZr alloy.
关键词:
Tungsten
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Yan LU
金属学报(英文版)
The effect of W on the microstructure and the mechanical properties of ultrahigh strength low alloy steels was carried out. The microstructure of 30Cr3Si2Mn2NiMoNb and 30Cr3Si2Mn2NiMoNbW steels under quenched conditions were investigated by metallographic microscope, scanning electron microscope (SEM), X-ray diffraction (XRD), and transmission electron microscope (TEM). Thermodynamic calculation was also conducted. The results showed that the addition of W made undissolved carbides more and finer, which exerted strong pinning force on migrating packet boundary and improved tensile strength significantly. M6C particles in 30Cr3Si2Mn2NiMoNb steel were disappeared above 1193 K, while the M6C particles in 30Cr3Si2Mn2NiMoNbW steel were disappeared above 1253 K, the calculation results were in agreement with the experimental.
关键词:
High strength and toughness steel
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