C.G.Shi
,
Y.H.Wang
,
L.G.Cai
,
C.H.Zhou
金属学报(英文版)
There are four new achievements of this work on the theory and technology of explosive welding.(1) It has been found and defined three kinds of bonding interfaces: big wavy, small wavy and micro wavy, and the micro wavy interface is the best. In a cladding plate,it is for the first time to find that the form of interface presents regular distribution.(2) Although the interface has the features of melt, diffusion and pressure welding in the mean time, the seam and "hole" brought by the melt weaken the bonding strength of interface greatly, and the effect of melt on interface must be eliminated in explosive welding, so explosive welding is not a melt weld. The diffusion welding is a kind of form of pressure welding, and the diffusion is not the reason of the bonding of interface but the result of interface high pressure. So the diffusion welding cannot also explain the bonding mechanism of it. The experiment and theory make clear that explosive welding is a special pressure one.(3) To get good interface of no melt, explosive charge must be selected on the low limit of welding windows. In explosive welding, the drive plate should be treated as the viscous and plastoelastic body, not incompressible fluid. The bending moment under the explosive welding loading must be greater than that under dynamic limit of drive plate. According to the condition, the lower limit of explosive welding is obtained. It is about 20 1.019373e-312ss than that obtained by tradition calculation, and suitable for engineering application.(3) It is for the first time to test and study on soil anvil characteristics and change regularity under explosive welding impact loading. Through soil anvil parameter optimization analysis, it is the best for explosive welding with sandy soil of water content 17.00and density 1.74g/cm^3.
关键词:
explosive welding
,
null
,
null
俞建
,
张金民
材料开发与应用
利用透射电子显微镜研究了321/Qd370qD爆炸焊接界面附近基板内的组织和前漩涡组织.结果表明,界面附近存在大量的非晶相、纳米晶,在距界面一定距离基板内也存在大量的纳米晶,在基板内存在调幅分解组织.前漩涡内存在片状孪晶马氏体和面心立方的M23 C6相.
关键词:
爆炸焊接
,
非晶
,
纳米晶
,
前漩涡
,
调幅分解
王小绪
,
王金相
,
赵铮
,
何勇
稀有金属材料与工程
为了研究爆炸焊接参数对锆钢复合板界面波的影响,对锆钢进行了小倾角法爆炸焊接,在不同碰撞速度和碰撞角条件下,得到了连续变化的界面波.通过对界面波进行金相显微观察,测量了不同位置界面波的波长和波高.采用SPH无网格方法对小倾角法爆炸焊接过程进行了数值模拟,计算出了不同位置的碰撞速度、碰撞角、比压强.研究表明,碰撞速度和碰撞角是影响界面波形的关键参数,当碰撞速度为493 m/s,碰撞角为9.8°时,开始产生界面波.随着碰撞速度和碰撞角的增加,界面波波长逐渐增加,比波长先减小后增加.
关键词:
爆炸焊接
,
界面波
,
碰撞速度
,
碰撞角
,
SPH法
辛宝
,
刘金涛
,
崔卫超
,
徐宇皓
材料开发与应用
通过有限元模拟分析和爆炸焊接试验验证,研究了原材料钛的屈服强度和大面积钛-钢复合板结合性能的关系.结果表明,在爆炸焊接高温高压作用下,钛层的塑性畸变是产生褶皱型未结合缺陷的主要因素;控制原材料钛的屈服强度使之处于较低的水平,能够改善钛在爆炸焊接时的塑性应变行为,有利于获得良好结合性能.
关键词:
大面积钛-钢复合板
,
结合性能
,
屈服强度
,
有限元模拟
,
爆炸焊接
侯发臣
,
李演楷
,
曲瑞波
材料开发与应用
对直接爆炸焊接困难的5083铝合金与CCSB钢组合,采用加入中间层板CCSB-次爆炸焊接的可行性进行了试验探讨,确定了界面处的微观结构和爆炸焊接的参数范围.试验表明,爆炸时较大的能量作用在5083-CCSB钢界面区产生气化和熔化反应层是导致直接爆炸焊接困难的原因.通过在二者之间加入CCSB薄板的方法,能有效地减少作用在5083-CCSB界面上的能量,从而实现良好的结合.
关键词:
爆炸焊接
,
过渡接头
,
铝合金
,
中间层
韩丽青
,
林国标
,
王自东
,
张鸿
,
李锋
,
游龙
稀有金属材料与工程
分别采用扫描电镜(SEM)、X射线衍射(XRD)、动电位极化技术及零内阻安培表方法研究爆炸焊接316L不锈钢接头的显微组织形貌、物相、点蚀及电偶腐蚀行为.结果表明,316L不锈钢侧焊缝金属存在严重的组织形变和金属间化合物相,且相对于基体试样,316L不锈钢侧焊缝和熔合区产生了更多的δ铁素体相,这些因素导致焊接后的316L不锈钢耐点蚀和电偶腐蚀性能降低.
关键词:
爆炸焊接
,
微组织形貌
,
相分析
,
点蚀
,
电偶腐蚀
