The head is not the same as powder metallurgy materials, welding prone pores even when empty, when the welding parameters, but also cracks greatly affect weld strength. The cutting performance of the welding performance, good mechanical properties and a dense head laser Welding Wire China conditions, as long as the welding parameters are properly selected, will be able to get in line with the use of performance weld flexural strength can be achieved or exceeded 1800N/mm2, off the tip. Excellent material must make the head performance, you must first raise the head pressing density can be used to select the fine particles, uniform shape of the powder compaction does not affect the premise of diamond performance, maximize the sintering temperature and compacting pressure and select the appropriate holding time is necessary to improve the mechanical properties of the tip. Tip within the inevitable existence of pores, the density of the tip of the theoretical value is not reached, but a suitable pressure, temperature and holding time, powder mixing time and speed are dense and uniform tip important guarantee, thereby to ensure a good Welding Cable performance. The tests showed that: when the unit pressure about 20MPa, the temperature is about 800 ℃, holding time of 4min, can be obtained to meet the needs of laser welding, without damage to the head of the mold and diamond performance. The density of the tip of the greatest impact on the strength of the weld, the weld strength of the low density of the tip welding is low, and almost impossible to achieve the desired strength.