| 摘要 |
A noodle rolling roll and a manufacturing method thereof are provided to obtain a rolling roll with excellent mechanical properties by forming a back layer that is a compound layer with superior wear resistance, a diffusion layer for increasing fatigue strength, an oxide layer for imparting corrosion resistance on a surface of the roll. A manufacturing method of a noodle rolling roll comprises: a casting process(S1) of injecting 0.2 to 2.0 wt.% of chromium(Cr), 0.2 to 2.0 wt.% of nickel(Ni) and 0.2 to 2.0 wt.% of molybdenum(Mo) into a gray iron casting workpiece to cast the gray iron casting workpiece into the form of a roll; a normalizing process(S2) of normalizing the cast roll; a cutting process(S3) of machining the roll to predetermined dimensions; a fitting process(S4) of close fitting the cut roll and a shaft, and fitting a pin into the shaft to fix the shaft to the roll; an annealing process(S5) of annealing the fitted roll; a grinding process(S6) of precisely machining a surface of the annealed roll; an oxy-nitriding process(S7) of sequentially heating the grinding process-performed roll to a temperature of 500 to 600 deg.C in a furnace, and injecting vapors of ammonia and water into the furnace, and cooling the roll in the air to form a metal compound layer, a diffusion layer and an oxide layer on a surface of the roll; and a grinding process(S8) of grinding a shaft portion of the roll to predetermined dimensions.
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