Experimental study of changing of texture, Hardness and Strength of threads on tube made by thread rolling and Machining

Machining and rolling processes are used to produce threads. The thread rolling process is more considered by the producers because of necessity to threads with high quality and strength in different industries. Other advantages of this process are producing without chips and wasting of material with high rate of manufacturing. Because of indicated geometry and small sizes of the threads studying on them is difficultly. As for increasing demands to accuracy, speed and optimization of manufacturing process the regard to the finite elements simulations of processes has been increased by the investigators. At this article making threads on St37 steel pipes has been done. For studying microhardness, texture of material and strength of threads made by thread rolling some tests were design and done. Then the results compared with process simulation results in ABAQUS commercial code and the results got by machining threading process. The results showed that the hardness and strength is significantly improved in the threads made by thread rolling and the hardness of these threads is higher than threads made by machining process.