High brittleness seamless steel pipe production process because there is no annealing, annealing is refine the organization, eliminate stress, reduce the hardness or eliminate dendritic segregation heated to high temperatures for the purpose of maintaining a certain time, and then slowly cooled to room temperature.
Annealing is divided into two categories: first, annealing is not dependent lattice structure changes only can be achieved by the thermal motion of atoms annealing purposes, including non-ferrous metal alloy ingot homogenization, annealing steel castings, annealing of malleable cast iron, steel and non-ferrous metal plastic processing after recrystallization annealing and stress relief annealing and removing excess material dissolved hydrogen dehydrogenation annealing. The second category is based on solid phase transformation annealing annealing, including steel products, and a handful of non-ferrous metal products used in fully annealed, incomplete annealing, isothermal annealing, annealing of the ball and so on. This type of annealing process is accompanied by changes in the lattice structure, as re-crystallization occurs, as it is known as recrystallization, established on the basis of such a change is called annealing recrystallization annealing. That second annealing.
Seamless steel pipe production process produces severe dendritic segregation and internal stress, in order to eliminate such defects for homogenization, also known as annealing. Because this process consumes energy costs of working hours, so only apply complex shape or composition of complex large and extra large pieces. Cold rolled steel, cold-drawn steel wire and steel strip and cold-pressed steel products, because work hardening, so that material can not continue processing, subject to recrystallization annealing to eliminate work hardening. Important parts of steel commonly used low-temperature annealing to eliminate internal stress or dehydrogenation.
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