Hebei Chiho steel tube industry in order to extend the life of the three-way tap, improve thread processing quality, processing and production during which a number of considerations should be noted: (1) selection of better tap material. Add special alloying elements in ordinary high-speed tool steel, can significantly improve the wear resistance and toughness tap. Appropriate to increase the tap shovel back. It should be noted, such as the shovel back too large knife in the back corner prone to the phenomenon within the chip into the rear tap, tapping out the threads and poor finish. Tap thread coated in titanium nitride coating, can significantly improve the tap wear resistance, heat resistance and lubricity. All carbon steel tee elements have a common characteristic, that the chromium content in more than 10.5%. Reasonable choice tool heat treatment methods to tap both hardness and toughness. Appropriate to increase the tap before the horn. It should be noted, such as the tap before the angle is too large knife in the back is likely to cause chipping and tap-tapping of the thread polygonal Almen (Almen) tee shot steel strength test commonly used test strip N (for the non-ferrous metal test ), A test piece (the most common), C specimen (higher strength) to be measured, and the relationship between the test piece A test piece C is approximately 3 times the relationship. As measured by C specimen strength 0.15-0.20C mm equivalent 0.45-0.60A mm. The figure for the C-thick test piece for A thin specimen. During the test, the test piece to measure the deformation of the original, and then the test piece was good card placed tooling blast box, using the same process as the workpiece is injected. Carbon steel tee shot ended, remove the test piece welded carbon steel tee, measuring deformation arch height. Tee shot blasting coverage coverage means that every point on the number of steel shot was hit piece, someone shot coverage often think: My lower spray nozzle 1 1 work 2 times, you can not meet 200% of the coverage it? first I feel justified, in fact not the case. Coverage measurement is as follows: first the surface coated with a fluorescent glaze or glaze, and then press the workpiece blasting parameters, each jet over the workpiece surface thick-walled carbon steel tee remove the microscope ( magnifying glass) remaining under observation a proportion of the coated surface, as well as 20% of the residual, the coverage rate of 80%. When the residual only 2%, or 98% of coverage, can be regarded as clear carbon steel tee, the 100% coverage, then there is a time. If it reaches 400% coverage, which is 4 times the time. Factors 16 5. Coverage of welded carbon steel tee tee _ _ Hebei Chiho Chiho by Hebei Industry Co., Ltd. Hebei Chiho Pipe Co., Ltd. (www.hbqh628.com) (www.hbqh628.com) strong, credible, Cangzhou in Hebei forging industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hebei Chiho into the brilliant and you work for a better future!