Stainless steel second polishing coordination processing
In processing finish for NO. 4 sheet, often need polishing soldering area again, so with the original surface finish harmonious, although in addition to duplicate original polishing beyond, with machine polishing surface coordination is virtually impossible, but skilled in the following manual methods can get close to mediate.
1, if the original machine polishing tattoo marks parallel to weld bead, then can use grinding method of extinction, namely first Daniel weld bead with hard or soft grinding wheel grinding, then use the portable polishing machine and granularity for NO. 80 ~ NO. 120 (may NO. 150) of polishing wheel are uploaded polishing, polishing wheel direction of the movement should be consistent with the weld bead towards, make its polishing line to the original machine polishing surface parallel lines. Weld must and matrix leveled. Because any original granularity of abrasive can leave grinding line (with abrasive usage), so in began to change before polishing, best first experiment.
2 if machine polishing grain does not parallel to the weld bead, then must press machine polishing the direction of the final hand-polishing. If the weld bead on either side of the original polishing grain mark not mutual parallel, (such as in the side them with weld parallel, in another side with weld bead vertical), then the best measures is along the weld bead (didn't cross) in polishing, such as the container shells and sealing head between the circumference of the weld, the shell of polishing line parallel to the circumferential weld along the containers, and sealing head of polishing line is perpendicular to the or parallel circles, or with surrounding into certain Angle, big lathe panel rotation this kind of containers, to sealing head again polishing and trimming, can make the sealing head, weld bead and shell on all polishing line parallel. Usable also block or other softer materials mat lining polishing paper (or cut from polishing bring the polishing bar), along with manual welding line polishing.
Stainless steel material chemical polishing
The polishing of stainless steel materials are mainly concentrated in ICr18NigTi class of materials and ICr13 3Crl3 etc, another kind of excluding Ni, Ti composition of stainless steel material. Due to the different material composition, chemical polishing solution composition and process is not identical also.
1) ICrl8NigTi etc stainless steel materials of this material for chemical polishing, can achieve better polishing effects, basic and electrochemical polishing results quite. And polishing solution composition excluding toxic larger chromic acid, only sulfuric acid and phosphoric acid and some salts and additives composition etc. In 70-80 ℃ passes under 10-20min polishing and surface brightness can achieve the effect of electrochemical polishing.
2) for ICr13, 3Crl3 etc stainless steel materials for hardware, knife cut industries where the majority of 1Crl3, 3Crl3 etc stainless steel material, because this material does not contain Ni, Ti composition etc, the surface polishing brightness, and it is difficult to reach the demand by electrochemical polishing by the ac power lines have more influence, another electrochemical polishing solution to still USES the pollution of the environment Cr03 such harmful ingredients, affect the environment.
Through optimization of chemical polishing solution composition of stainless steel chemical polishing craft get and electrochemical polishing quality fairly. The main components of the chemical polishing solution has H3PO4, H2SO4, NaCL, etc. In order to improve the workpiece surface brightness added certain polishing additives. Solution polishing temperature as ℃ 75-85, polishing time surely 5-8 min. Can achieve the effect of electrochemical polishing. With polishing solution of consumption, above solution can complement to add, stipulated in the process conditions can still achieve better polishing effects.
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