擴散連接：使同質或異質材料相互擴散

Enable inter-diffusion bonding of homogeneous or heterogeneous materials

異質材料擴散連接界麵

Connection interface of heterogeneous materials diffusion

HIP擴散連接是在密閉的容器中，在原子快速移動的高溫下施加壓力，從而使緊密接觸的表麵在固態下連接到一起的焊接工藝。HIP可以連接兩種不同的材料，如金屬-金屬、金屬-非金屬、非金屬-非金屬，根據兩種材料熱力學性能的差別考慮是否添加過渡層元素。從材料形態上來講可以是粉-固、固-固、粉-粉連接。

HIP diffusion bonding is a welding process, that, in a closed container, pressure is applied under the high temperature, so that the surface will be bonded together. HIP can connect two different materials, such as metal-metal, metal-nonmetal, nonmetal-nonmetal; whether transition layers are needed or not depends on the thermodynamics properties of the two (or more) materials. The bonding types can be powder-solid, solid-solid and powder-powder.

l  連接相同性能材料時，由於界麵不產生液相，界麵結合強度與母材相當；

l  連接不同性能材料時界麵可實現良好的冶金結合，且性能不低於兩種材料中的較低者。

l  可以連接接觸麵具有複雜形狀的零件，並實現嚴格的尺寸控製；

l  可在一道工序中連接多個同類或異類材料；

l  可使常規焊接方法無法連接的脆性金屬實現固態連接；

l  由於作用在零件上的等靜壓力高且均勻因此減少及消除了在連接區外側的微小氣孔。

l  For bonding of materials with the same properties, because the liquid phase is not exist at the interface, the interfacial bonding strength is equal to that of the base metal;

l  Materials with different properties can achieve perfect metallurgical bonding, and the performance of the composite is no less than the lower of the two.

l  Able to bond parts with irregular contact surface and realize the strict size control.

l  Able to bond more than two kinds of similar or dissimilar materials in one process;

l  Able to realize the solid connection of brittle metals that cannot be connected by the conventional welding method;

l  Because of the high isostatic pressure, the small pores outside the joint district are reduced or eliminated.