CN103451696A

CN103451696A - Stainless steel tubular product with nickel plate

Info

Publication number: CN103451696A
Application number: CN2013104329456A
Authority: CN
Inventors: 叶红
Original assignee: 叶红
Current assignee: Chongqing Juyuan Stainless Steel Products Co., Ltd.
Priority date: 2013-09-22
Filing date: 2013-09-22
Publication date: 2013-12-18
Anticipated expiration: 2033-09-22
Also published as: CN103451696B

Abstract

The invention discloses a stainless steel tubular product with a nickel plate. The stainless steel tubular product with the nickel plate is characterized in that processing conducted before plating is improved, specifically, technological parameters of processing conducted before shot blasting are reasonably optimized especially for cylindrical base materials, suitable surface roughness and a strengthening effect are achieved through the optimal parameters, and therefore a better plating effect is achieved.

Description

A kind of stainless steel pipe with nickel layer

Technical field

The present invention relates to the surface strengthening treatment technology field, particularly a kind of stainless steel pipe with nickel layer through surface Hardening Treatment.

Background technology

Shot peening is that a kind of utilization utilizes pressurized air or centrifugal force etc. to be ejected into the surface of processed base material as the shot-peening such as spherical, makes its surface obtain clean, coarse, as to harden texts surface Hardening Treatment technique.This effect of surface roughening particularly, will produce many beneficial effects for the following process of substrate surface.As everyone knows, adopting at present the technique means such as surface coating, coating is to improve economy the most and the effective means of materials'use performance, and the bonding properties of plated film, coating and substrate surface is the key that affects plated film, coating success or not.By shot peening, substrate surface is processed and can be obtained surperficial scraggly roughen effect, thereby make the techniques such as plated film coating subsequently can obtain the concavo-convex intermeshing effect of coating and substrate surface, thereby improve greatly the sticking power of coating.Simultaneously, the pre-treatment of shot peening can also obtain clean surface and improve the surface hardness texts, has also assisted to a certain extent plating technic subsequently.

But the current research of relevant shot peening also mainly concentrates on the substrate surface treatment of the simple shapes such as plane, for complex surface shape-such as cylindrical etc., also lack extensively and systematic research.How can optimize the working process parameter of shot peening, thereby obtain the most effectively surface treatment effect, be technical problem urgently to be resolved hurrily, and the solution of this problem has great importance undoubtedly for the plating of tube surfaces.

Summary of the invention

Purpose of the present invention is to provide a kind of stainless steel pipe with nickel layer that obtains the shot peening of excellent tube surfaces treatment effect and the acquisition of plating technic subsequently by optimizing the shot peening processing parameter.

For achieving the above object, the present invention adopts following technical scheme:

A kind of plating technic of tube surfaces, it carries out shot peening to tube surfaces before comprising plating, the clean after shot peening, and implement plating to form coating in tube surfaces, it is characterized in that:

Described shot peening is to adopt the pressurized air blaster to be processed tube surfaces, is specially:

At first, to cylindrical substrate surface polished pre-treatment, acetone ultrasonic cleaning 10-15min subsequently;

The second, cylindrical substrate is fixed on turning axle and makes it rotation;

The 3rd, adjust the nozzle of pressurized air blaster behind working position, implement shot peening, concrete machined parameters is: nozzle extended line and shot-peening are 30-40 ° and injection direction and base material sense of rotation contrary at the angle of substrate surface shock point place tangent line, the white fused alumina sand that shot-peening is the 0.2-0.4mm particle diameter, jet length is 60-80mm, and spraying pressure is 0.4-0.6Mpa, and the base material speed of rotation is 80-100rpm.

The metal pipe material wherein preferred, that the external diameter of cylindrical substrate is 60-80mm.

Wherein preferred, two nozzles are set, the injection direction of two nozzles is aimed at respectively columniform highs and lows.

Wherein preferred, the polishing pre-treatment is to adopt 800# sand paper to carry out uniform grinding along the cylindrical substrate axis direction.

Wherein preferred, the shot-peening time is 2-3min.

Clean after wherein said shot peening is to adopt acetone ultrasonic cleaning 20-30min.

The invention has the advantages that: the processing parameter to the shot peening before the stainless steel pipe plating has carried out rational optimization, has adopted optimum parameter to obtain suitable surfaceness and strengthening effect, thereby is that follow-up plating is ready.

The accompanying drawing explanation

The shot-blast process of Fig. 1 embodiment of the present invention 1 is implemented schematic diagram;

The shot-blast process of Fig. 2 embodiment of the present invention 12 is implemented schematic diagram; .

Embodiment

Embodiment 1.

Select the austenitic stainless steel pipe of external diameter 60mm, wall thickness 5mm as processed base material;

At first, adopt 800# sand paper to carry out uniform grinding along steel pipe base material axis direction, subsequently acetone ultrasonic cleaning 15min;

The second, the steel pipe base material is fixed on turning axle to the speed rotation made it with 80rpm;

The 3rd, adjust the nozzle of pressurized air blaster behind working position, implement shot peening, concrete machined parameters is: nozzle extended line and shot-peening are 30 ° and injection direction and base material sense of rotation contrary at the angle of substrate surface shock point place tangent line, the white fused alumina sand that shot-peening is the 0.2mm particle diameter, jet length is 60mm, spraying pressure is 0.4Mpa, for the powder amount, be 1.5kg/min, the shot-peening time is 2min.

The processing step of embodiment 2-11 and comparative example 1-6 is substantially the same manner as Example 1, and the test result after the difference of concrete technology parameter and processing is as shown in table 1; Embodiment 12 adopts the injection direction of two nozzles and two nozzles to aim at respectively columniform highs and lows, and what reduce each nozzle is 0.75kg/min for the powder amount simultaneously.

Test result from table 1, the injection direction of 30-40 ° can obtain ideal surfaceness and relatively acceptable out of roundness, this be due to the excessive one side of angle will make shot-peening more the more substrate surface impacted and substrate surface do not produced to enough cutting components, cross on the other hand strong shot-peening reflection and also can affect the treatment effect of follow-up shot-peening, angle is excessive simultaneously also can cause the out of roundness variation, angle too small had and may make shot-peening more skim over surface and produce the cutting component, therefore preferably spray angle is 30-40 °.

Test result by table 1 it can also be seen that, the particle diameter of shot-peening also has considerable influence to roughness, the shot-peening particle diameter can obtain desirable surfaceness under the 0.2-0.4mm condition, and along with the further increase of particle diameter, can be because the impact frequency of shot-peening, the decline of acutance cause the decline of surfaceness, also variation of out of roundness simultaneously, and particle diameter is too small, be difficult to form enough cuttings and obtain enough surfacenesses.

The impact of spraying pressure is also comparatively obvious, the too small effect that obviously is difficult to reach the due surface roughening of shot-peening of pressure, pressure is excessive has brought the meaningless variation of out of roundness on the contrary for the not more contribution of roughening, and therefore setting spraying pressure is 0.4-0.6Mpa.

In addition, the base material external diameter is excessive, will likely cause the unacceptable variation of out of roundness, so the external diameter of pref. cylindrical base material is 80mm to the maximum.

And jet length must be suitable, jet length too far away will cause roughness to be difficult to reach required, but excessively near jet length defection is because the too much disturbing influence of reflection shot-peening worsens treatment effect.

The result of embodiment 12 shows, quantity that can be by setting up nozzle is in the situation that unit surface is accepted identical shot-peening quantity impacts and obtain the appropriate surfaces roughness and optimize out of roundness simultaneously, and this may be the out of roundness variation of having been avoided excessive work hardening and brittle flaking off to cause owing to having improved the repeated stock frequency.

The processing parameter of table 1 embodiment and comparative example and test result

The stainless steel pipe of processing through shot peening that the present invention is obtained adopts acetone ultrasonic cleaning 25min, then adopts the mode of electroplating to form nickel layer, high strength galvanized steel excellence on its surface.

Claims

1. the stainless steel pipe with nickel layer, it is through before plating, tube surfaces being carried out to shot peening, the clean after shot peening, and implement plating in tube surfaces and obtain with the preparation process that forms coating, it is characterized in that:

At first, the tube surfaces that is 60-80mm to external diameter adopts 800# sand paper to carry out uniform grinding along the cylindrical substrate axis direction, subsequently acetone ultrasonic cleaning 10-15min;

The second, tubing is fixed on turning axle and makes it rotation;

The 3rd, adjust the nozzle of pressurized air blaster behind working position, implement shot peening, concrete machined parameters is: nozzle extended line and shot-peening are 30-40 ° and injection direction and tubing sense of rotation contrary at the angle of tube surfaces shock point place tangent line, the white fused alumina sand that shot-peening is the 0.2-0.4mm particle diameter, jet length is 60-80mm, and spraying pressure is 0.4-0.6Mpa, and the tubing speed of rotation is 80-100rpm.

2. a stainless steel pipe according to claim 1, the clean after wherein said shot peening is to adopt acetone ultrasonic cleaning 20-30min.