CN105220142A - A kind of method of motor-vibro screen sieve axle laser repairing - Google Patents

Abstract

The invention provides the method for a kind of motor-vibro screen sieve axle laser repairing.It is characterized in that, comprise the following steps: step one: sieve axle surface abrasion layer is removed in machining, removes clean matrix surface greasy dirt and rusty stain with acetone soln; Step 2: select Co-based alloy powder to repair, by dry for powdered alloy 24h before experiment, adopts synchronous powder feeding system device; Step 3: use semiconductor laser to carry out surface reconditioning, laser power 3000W, selecting hot spot wide is 3 ~ 30mm, focal length 370mm, sweep velocity 4 ~ 16mm/s, and protection gas is argon gas; Step 4: mechanical grinding is to sieving original size of axle originally.Invention adopts synchronous powder feeding system, has carried out the reparation of large-area sieve axle, has avoided waste of material, obtained even, fine and close, and the cladding layer of larger area metallurgical binding.

Description

A kind of method of motor-vibro screen sieve axle laser repairing

Technical field

The present invention relates to a kind of method of sieving axle surface reconditioning, particularly refer to that the sieve axle of a kind of semiconductor laser to wearing and tearing carries out the method for surface reconditioning.

Background technology

Laser melting and coating technique is a kind of new process for modifying surface that 20 century 70s rise along with the development of high power laser, cladding laser surfaces technology under laser beam effect, powdered alloy or ceramic powder and matrix surface is heated rapidly and melted, it is extremely low that light beam removes rear self-excitation cooling formation thinning ratio, with the top coat that body material is metallurgical binding, thus it is wear-resisting significantly to improve matrix surface, anti-corrosion, heat-resisting, a kind of surface reinforcing method of anti-oxidant and electrical specification etc., it can prepare high performance alloy surface and not affect the character of matrix on cheap metal base material, reduce costs, save valuable Rare Metals Materials, therefore, the Study and appliance of each industrial advanced country to laser melting and coating technique is all paid much attention in the world.

Electric industrial sieve apparatus can have multiple, has laboratory to make analysis of experiments, also can be used as to produce.Its effect makes bulk material by one or more layers compass screen surface, is divided into the process of different grain size grade product by screen size.In screening process, material is pressed granularity layering by compass screen surface and is separated; The particle being less than sieve aperture becomes screen undersize by sieve aperture; The particle being greater than sieve aperture is stayed on compass screen surface and is become oversize.Motor-vibro screen is widely used in the industrial sectors such as mining industry, building, metallurgy, chemical industry, cement.

Sieve axle plays other parts of supporting in the machine, transmits the effect of motion and power.Shaft member lost efficacy, and often reduced the kinematic accuracy of parts on shaft, shortened the work-ing life of part.Common surface failure form has abrasion and corrosion two kinds, and wherein wearing and tearing can make the working-surface scratch of axle, the transfer of surface metal or forfeiture, material surface oxidation etc.; Corrosion can make axle surface produce pit, and surface metal corrodes, and produces rusty stain or other erosions etc.Due to working conditions and the job specification of axle, the surface loss and the corrosion that cause axle account for the very most of of its inefficacy, cause the significant wastage of resource.Therefore carry out repairing and reusing to sieve axle to have a very big significance.

Summary of the invention

The object of this invention is to provide a kind of method of sieving axle surface reconditioning, solve the wasting phenomenon caused because sieve axle lost efficacy.

The technical solution adopted in the present invention is, it is characterized in that, comprises the following steps:

Step one: sieve axle surface abrasion layer is removed in machining, removes clean matrix surface greasy dirt and rusty stain with acetone soln;

Step 2: select Co-based alloy powder to repair, by dry for powdered alloy 24h before experiment, adopts synchronous powder feeding system device;

Step 3: use semiconductor laser to carry out surface reconditioning, laser power 3000W, selecting hot spot wide is 3 ~ 30mm, focal length 370mm, sweep velocity 4 ~ 16mm/s, and protection gas is argon gas;

Step 4: mechanical grinding is to original size of sieve axle.

Various powder sizes in step 2 are-140 ~ 325 orders.

The present invention has the following advantages:

1, laser melting coating reparation inefficacy part both can avoid waste of material, can increase again the work-ing life after reparation;

2, semiconductor laser melting and coating technique, when sieving the large-area laser cladding on axle surface, can reduce overlap joint number of times, avoid more overlap because repeating to be heated, cause structure and properties and the phenomenon such as cladding layer is in uneven thickness, can obtain even, fine and close, and the cladding layer of larger area metallurgical binding;

3, heat inputs and distorts less, and when especially adopting high power density quick cladding, distortion can be reduced in the fitting allowance of part;

4, the feature such as self-fluxing nature, wettability and surfacing performance is good, surfacing settled layer is anti-corrosion, wear-resisting, good toughness of Co-based alloy powder, is applicable to surface strengthening and the reparations such as mould, axle class, blade of gas turbine, gear.

Accompanying drawing explanation

Fig. 1 is for before the reparation of sieve axle;

Fig. 2 is for after the reparation of sieve axle;

Fig. 3 is the SEM metallograph of example one of the present invention;

Fig. 4 is the energy spectrogram of example one of the present invention;

Fig. 5 is the SEM metallograph of example two of the present invention;

Fig. 6 is the energy spectrogram of example two of the present invention;

Fig. 7 is the SEM metallograph of example three of the present invention;

Fig. 8 is the energy spectrogram of example three of the present invention.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

Example one:

(1) sieve axle surface abrasion layer is removed in machining, removes clean matrix surface greasy dirt and rusty stain with acetone soln;

(2) select Ni25 powdered alloy to repair, by dry for powdered alloy 24h before experiment, adopt synchronous powder feeding system device;

(3) use semiconductor laser to carry out surface reconditioning, laser power 3000W, selecting hot spot wide is 3 ~ 30mm, focal length 370mm, sweep velocity 4 ~ 16mm/s, and protection gas is argon gas;

(4) step 4: mechanical grinding is to original size of sieve axle;

(5) use scanning electron microscope and power spectrum through row microscopic appearance and constituent content test.As shown in Figure 3, energy spectrogram as shown in Figure 4 for SEM metallograph.

Example two:

(1) sieve axle surface abrasion layer is removed in machining, removes clean matrix surface greasy dirt and rusty stain with acetone soln;

(2) select Ni35 powdered alloy to repair, by dry for powdered alloy 24h before experiment, adopt synchronous powder feeding system device;

(3) use semiconductor laser to carry out surface reconditioning, laser power 3000W, selecting hot spot wide is 3 ~ 30mm, focal length 370mm, sweep velocity 4 ~ 16mm/s, and protection gas is argon gas;

(4) mechanical grinding is to original size of sieve axle;

(5) use scanning electron microscope and power spectrum through row microscopic appearance and constituent content test.As shown in Figure 5, energy spectrogram as shown in Figure 6 for SEM metallograph.

Example three:

(1) sieve axle surface abrasion layer is removed in machining, removes clean matrix surface greasy dirt and rusty stain with acetone soln;

(2) select Ni40 powdered alloy to repair, by dry for powdered alloy 24h before experiment, adopt synchronous powder feeding system device;

(3) use semiconductor laser to carry out surface reconditioning, laser power 3000W, selecting hot spot wide is 3 ~ 30mm, focal length 370mm, sweep velocity 4 ~ 16mm/s, and protection gas is argon gas;

(4) mechanical grinding is to original size of sieve axle;

(5) use scanning electron microscope and power spectrum through row microscopic appearance and constituent content test.As shown in Figure 7, energy spectrogram as shown in Figure 8 for SEM metallograph.

Claims (2)

1. the invention provides the method for a kind of motor-vibro screen sieve axle laser repairing.It is characterized in that, comprise the following steps:

Step one: sieve axle surface abrasion layer is removed in machining, removes clean matrix surface greasy dirt and rusty stain with acetone soln;

Step 2: select Co-based alloy powder to repair, by dry for powdered alloy 24h before experiment, adopts synchronous powder feeding system device;

Step 3: use semiconductor laser to carry out surface reconditioning, laser power 3000W, selecting hot spot wide is 3 ~ 30mm, focal length 370mm, sweep velocity 4 ~ 16mm/s, and protection gas is argon gas;

Step 4: mechanical grinding is to original size of sieve axle.

2. the method for motor-vibro screen sieve axle laser repairing as claimed in claim 1, it is characterized in that, the granularity of each powder in step 2 is-140 ~ 325 orders.