CN104726664B - Production method of double-composite coating strap for optical and medical instrument components - Google Patents

Abstract

The invention discloses a production method of a double-composite coating strap for optical and medical instrument components. The method comprises the following steps: carrying out cold rolling, conventional degreasing and annealing; preparing the strap: uncoiling, splitting and removing burrs; electroplating Zn-Ni; washing for the first time and baking; electroplating Sn-Co; washing for the second time and baking; and carrying out conventional rolling. According to the product produced by the method, the thickness is 0.25mm; the tensile strength is 840-880MPa; the ductility is 8%-11%; a layer of Zn-Ni/Sn-Co double-composite coating which is uniform, dense, high in adhesive force, 7-10 microns in thickness and bright is generated on the surface; the surface coarseness of the coating is 0.1-0.3 micron; the reflectivity is 90%-97%; and good mirror characteristics are displayed. The product is not obviously corroded on the surface when being put in an indoor atmospheric environment for 1200 days; the corrosion resisting property is good; and the product performance can completely meet the requirements for banding and packaging the optical and medical instrument components.

Description

Optics and the double composite deposite tie production methods of medical instrument parts packaging

Technical field

The present invention relates to a kind of production method of tie, specifically belongs to a kind of optics and medical instrument parts packaging Double composite deposite tie production methods.

Background technology

Some parts soft materials on optics and medical instrument, surface are very accurate, while with certain optics Must SC when performance, transport and storage.This requires that corresponding tie must have appropriate mechanical property, relatively thin Thickness and good corrosion resisting property, with prevent because its intensity is too high, size is too thick or the rusty scale on surface and damage above-mentioned zero The surface of part.Simultaneously as these parts conduct light in instrument with transmitting image, thus it is tied up in instrument internal When, it is also desirable to corresponding tie has certain optical property.Turn blue and tie of painting is because rough surface however, common Degree and is not properly sized, does not possess the factors such as optical property height, poor corrosion resisting property, mechanical property, it is impossible to meet tie up optics and The needs of medical instrument parts.

China Patent Publication No. is the document of CN104120340A, it discloses a kind of precision electronic element bundling Zn- The production method of Sn composite deposite ties.Which passes through " hot dip Zn- hot dip Sn " technique, though make product surface generate one layer uniformly Fine and close, adhesive force is strong, thickness is 3 ~ 4 m, the Zn-Sn composite deposites with beautiful gloss.Coating surface hardness is relatively low, relative It is softer.There is no obvious corrosion for lower 510 days in product atmospheric environment disposed within, corrosion resisting property is good, but due to coating outside Sn layers in atmosphere through long-time expose after, easily surface formed SnO₂Passivating film, although improve the anti-corrosion of coating Property, but causing the specular reflectivity of coating to be gradually reduced, optical property is deteriorated.

China Patent Publication No. is the document of CN104018080A, it discloses a kind of Zn- of tensile strength >=950 MPa The production method of Al composite deposite ties.Which passes through " plating Zn- hot dip Al " technique, though make product surface generate one layer uniformly Fine and close, adhesive force is strong, thickness is 3 ~ 4 m, the Zn-Al composite coating with beautiful gloss.Product is placed in 540 in acid atmosphere There is no obvious corrosion in it, corrosion resisting property is good, but as the Al layers outside coating are in atmosphere after long-time exposes, Easily Al is formed on surface₂O₃Passivating film, although improve the corrosion resistance of coating, but cause the specular reflectivity of coating gradually Decline, optical property is deteriorated.

By being analyzed to prior art, if it is considered herein that using the carbon steel of high performance-price ratio as raw material steel grade, Using suitable rolling mill practice, and by continuous plating process, tie surface is made to form the composite deposite with mirror features, just It is possible to produce and meets optics and medical instrument parts and carry out the tie of enlacement packaging needs, solves the current technical field The problem of presence.

The content of the invention

The present invention is directed to the deficiencies in the prior art, there is provided a kind of to have lower thickness, appropriate mechanical property, excellent corrosion resistance The double composite deposite ties of the Zn-Ni/Sn-Co of energy and optical property and production method, to meet optics and medical instrument parts Carry out the needs of enlacement packaging.

The application to achieve these goals, has carried out substantial amounts of test and analysis, through optimized choice, hot using Q255 Roll pickling to roll up as raw material base, and the technique by contiguous segmentation electroplating Zn-Ni and Sn-Co is produced.Why so select Select, be because：One is, using carbon steel Q255 as raw material steel grade, both to have can ensure that the mechanical property of product, can reduce original again Material cost.Two is first to electroplate one layer of Zn-Ni alloy on tie base material, compared with traditional Zn coating, Zn-Ni coating it is anti-corrosion Performance is significantly improved, and extends the service life of tie.Additionally, the internal stress of Zn-Ni coating is less, it is not easy to crack, Stability is high.And light is smooth, can be used as the substrate of subsequent plating layer.Three is to continue one layer of Sn- of plating on Zn-Ni coating Co alloys, compared with traditional bright Cr coating, Sn-Co coating finish is higher, equally with preferable optical property.Together When, case hardness is relatively low, can greatly mitigate the damage to component surface.

Realize the measure of above-mentioned purpose：

Optics and the double composite deposite tie production methods of medical instrument parts packaging, its step：

1) carry out cold rolling：

Used as raw material base, steel plate thickness is 1.7 ± 0.1mm to the conventional Q255 hot rolling acid-cleanings volume of A, employing；

B, hot rolling acid-cleaning volume carry out 8 passage cold rollings, and it is 83 ~ 87% to control total reduction, and cold rolling feedses thickness is 0.25 ±0.01 mm；

C, carry out conventional defat；

D, annealed, annealing temperature is 620 ~ 660 °C, temperature retention time is 10 ~ 20min；

2) carry out band processed：

Slitting and deburring are carried out after A, defat cold rolling feedses uncoiling；

B, electroplating Zn-Ni is carried out, in ZnSO₄+NiSO₄Carry out in acidic bath, ZnSO₄With NiSO₄Proportionally 1/0.95 ~ 1/1.05 adds, and electric current density is 1.8 ~ 2.8 A/dm², electroplating temperature is 50 ~ 60 °C；

C, first time washing is carried out, and steel strip surface is dried to no moisture；

D, plating Sn-Co is carried out, in SnCl₂+CoCl₂Carry out in alkali plating solution, SnCl₂With CoCl₂Proportionally 1/0.95 ~ 1/1.05 adds, and electric current density is 0.4 ~ 1.2 A/dm², electroplating temperature is 50 ~ 60 °C；

E, second washing is carried out, and steel strip surface is dried to no moisture；

F, carry out conventional batching.

The invention reside in：One is first one layer of Zn-Ni alloy of plating on tie base material, compared with traditional Zn coating, Zn- The corrosion resisting property of Ni coating is significantly improved, and extends the service life of tie.Additionally, the internal stress of Zn-Ni coating is less, do not allow Crackle is also easy to produce, stability is high.And light is smooth, can be used as the substrate of subsequent plating layer.Two are continued on Zn-Ni coating One layer of Sn-Co alloy of plating, compared with traditional bright Cr coating, Sn-Co coating finish is higher, equally with preferable light Learn performance.Meanwhile, case hardness is relatively low, can greatly mitigate the damage to component surface.

Being produced according to technique proposed by the present invention, the thickness of the product of production is 0.25 mm, tensile strength is 840 ~ 880MPa, elongation percentage are 8 ~ 11%.And Surface Creation one layer of even compact, adhesive force is strong, thickness is 7 ~ 10 m, light The double composite deposites of Zn-Ni/Sn-Co, coating surface roughness are 0.1 ~ 0.3 m, and reflectance is 90 ~ 97%, and good mirror is presented Region feature.Product atmospheric environment disposed within is lower 1200 days, and surface does not occur obvious corrosion, and corrosion resisting property is good.Properties of product Fully meeting optics and medical instrument parts carries out the needs of enlacement packaging.

Specific embodiment

Below the present invention is described in detail：

Table 1 is the cold rolling and parameter and annealing list of various embodiments of the present invention and comparative example；

Table 2 is the electroplating technological parameter list of various embodiments of the present invention and comparative example；

Table 3 is the properties of product list of various embodiments of the present invention and comparative example.

Various embodiments of the present invention are produced according to following steps：

1) carry out cold rolling：

Used as raw material base, steel plate thickness is 1.7 ± 0.1mm to the conventional Q255 hot rolling acid-cleanings volume of A, employing；

B, hot rolling acid-cleaning volume carry out 8 passage cold rollings, and it is 83 ~ 87% to control total reduction, and cold rolling feedses thickness is 0.25 ±0.01 mm；

C, carry out conventional defat；

D, annealed, annealing temperature is 620 ~ 660 °C, temperature retention time is 10 ~ 20min；

2) carry out band processed：

Slitting and deburring are carried out after A, defat cold rolling feedses uncoiling；

B, electroplating Zn-Ni is carried out, in ZnSO₄+NiSO₄Carry out in acidic bath, ZnSO₄With NiSO₄Proportionally 1/0.95 ~ 1/1.05 adds, and electric current density is 1.8 ~ 2.8 A/dm², electroplating temperature is 50 ~ 60 °C；

C, first time washing is carried out, and steel strip surface is dried to no moisture；

D, plating Sn-Co is carried out, in SnCl₂+CoCl₂Carry out in alkali plating solution, SnCl₂With CoCl₂Proportionally 1/0.95 ~ 1/1.05 adds, and electric current density is 0.4 ~ 1.2 A/dm², electroplating temperature is 50 ~ 60 °C；

E, second washing is carried out, and steel strip surface is dried to no moisture；

F, carry out conventional batching.

The cold rolling and parameter and annealing of 1 various embodiments of the present invention of table and comparative example

The electroplating technological parameter of 2 various embodiments of the present invention of table and comparative example

The properties of product of 3 various embodiments of the present invention of table and comparative example

From table 3 it can be seen that the tie of the present patent application, its thickness is 0.25 mm；Tensile strength is 840 ~ 880 MPa； Elongation percentage is 8 ~ 11%；Atmospheric environment disposed within is lower 1200 days, and surface corrosion area is less than 1%, and corrosion resisting property is good；It is double multiple Conjunction thickness of coating is 7 ~ 10 m；Surface roughness is 0.1 ~ 0.3 m, and reflectance is 90 ~ 97%, and good mirror features are presented. Properties of product fully meet optics and medical instrument parts and carry out the needs of enlacement packaging.

Above-described embodiment is only most preferably enumerated, and is not the restriction to embodiments of the present invention.

Claims (1)

1. double composite deposite tie production methods of optics and medical instrument parts packaging, its step：

1) carry out cold rolling：

Used as raw material base, steel plate thickness is 1.7 ± 0.1mm to the conventional Q255 hot rolling acid-cleanings volume of A, employing；

B, hot rolling acid-cleaning volume carry out 8 passage cold rollings, controls total reduction for 83 ~ 87%, cold rolling feedses thickness for 0.25 ± 0.01 mm；

C, carry out conventional defat；

D, annealed, annealing temperature is 620 ~ 660 °C, temperature retention time is 10 ~ 20min；

2) carry out band processed：

Slitting and deburring are carried out after A, defat cold rolling feedses uncoiling；

B, electroplating Zn-Ni is carried out, in ZnSO₄+NiSO₄Carry out in acidic bath, ZnSO₄With NiSO₄Proportionally 1/0.95 ~ 1/ 1.05 add, and electric current density is 1.8 ~ 2.8 A/dm², electroplating temperature is 50 ~ 60 °C；

C, first time washing is carried out, and steel strip surface is dried to no moisture；

D, plating Sn-Co is carried out, in SnCl₂+CoCl₂Carry out in alkali plating solution, SnCl₂With CoCl₂Proportionally 1/0.95 ~ 1/ 0.99 or SnCl₂With CoCl₂Proportionally 1/1.01 ~ 1/1.05 add, electric current density is 0.4 ~ 0.9 A/dm²Or electric current density For 1.1 ~ 1.2 A/dm², electroplating temperature is 50 ~ 60 °C；

E, second washing is carried out, and steel strip surface is dried to no moisture；

F, carry out conventional batching.