Method for manufacturing free-cutting stainless steel wire for ball-point pen head

Abstract

The invention discloses a method for manufacturing the free-cutting stainless steel wire for a ball-point pen head, comprising the following steps: (1) treating the skin film; (2) drying; (3) drawing for the first time and carrying out bright annealing on line for the first time, wherein the area-reduction rate during drawing for the first time is 40-60%, the temperature of carrying out bright annealing on line for the first time is 700-900 DEG C, and the annealing speed is 3-9m / min; (4) drawing for the second time and carrying out bright annealing on line for the second time, wherein the area-reduction rate during drawing for the second time is 40-60%, the temperature of carrying out bright annealing on line for the second time is 700-900 DEG C, and the annealing speed is 5-12m / min; and (5) drawing for the third time, wherein the area-reduction rate during drawing for the third time is 25-45%. The free-cutting stainless steel wire manufactured by the method has a bright surface, is free from the defects of black and yellow lines, drawing stamps, cracks, folding lines, peeling and the like and has the following mechanical properties: the yield strength of 500-800N / mm<2>, the tensile strength of 700N / mm<2> or higher, the elongation of 3-6% and the hardness value (HV) of 240-280.

Description

technical field [0001] The invention relates to a manufacturing method of stainless steel wire, in particular to a manufacturing method of free-cutting stainless steel wire for a ball point pen head. Background technique [0002] According to the performance of the ink used, ballpoint pens are divided into five types: oily, water-based, pressure, ball-ball and erasable. A ballpoint pen is generally composed of a pen stem, a refill, and oil (water) ink. The refill is composed of five parts: a ball, a ball seat, an oil pipe, ink, and a floating plug. The functions of sliding, adhering and carrying oil (water) ink to the paper surface to complete the writing record. [0003] In the past, the balls were made of stainless steel, but now they are mostly made of hard alloy. The surface of the ball has high hardness, wear resistance and corrosion resistance, and the surface is densely covered with uniform micropores, which is easy to absorb ink and achieve uniform ink output and sm...

AI Technical Summary

Problems solved by technology

The ballpoint pen head material was first made of lead brass, but its corrosion resistance and wear resistance were poor, and it was gradually replaced by nickel-nickel copper, but the corrosion resistance and wear resistance of nickel-nickel copper were still worse than stainless steel and hard alloys. At present, foreign high-end ballpoint pens use stainless steel nibs.