The invention discloses a
processing and manufacturing method of a cylinder body prepared from an alloyed
tool steel 5CrNiMn material and belongs to the technical field of integrated
machining. The cylinder body is characterized in that a billet is obtained by
forging forming; the billet is subjected to annealing to remove
internal stress and subsequently undergoes
machining,
carbonitriding, deposition treatment and
shot peening strengthening; multiple times of upsetting are performed in the
forging process of a cylinder body blank, so that the tearing of a
forge piece is avoided, structures become uniform and
crystal grains are refined; upset billets are formed on an upset place, so that
metal is reasonably distributed and is well fully fills a die cavity; the cylinder body is machined by turning, boring and
honing; in the
processing process, trace atomized tiny water droplet
cutting fluid is fed to a
cutting zone through low-temperature
cold air for cooling and lubricating, so that the outflow direction of a rotary tool is identical with that of
cutting chips, the circumferential speed of a cutting edge is greater than the outflow speed of the cutting chips, and further the formation of mechanical tumors is avoided; and then surface treatment and deposition treatment are performed on an engine cylinder body. The cylinder body processed by the manufacturing method is high in
wear resistance and long in service life; in addition, the precision accords with standards; and meanwhile, the
hardness and bending strength of cylinder
body surface are also improved.