A kind of preparation method of milling train liner plate
Technical field
The present invention relates to machining technology field, particularly a kind of preparation method of milling train liner plate.
Background technology
In the milling train course of work, whole milling train bearing capacity is very big, during mill milling steel plate, is moved in milling train
Abrasion of the part to fixing liner plate on mill housing is very big.Conventional liner plate is changed frequently due to wearing no resistance, in actual use,
Downtime and entreprise cost are added, finds a kind of milling train liner plate more resistant, performance is good, cheap and its preparation side
Method, for improving iron and steel enterprise's milling train productivity effect, it is significant to reduce shutdown loss.
In recent years, for how to improve the service life of rolling mill lining plate, engineers and technicians are from design, selection, assembling etc.
Aspect has carried out many improvement, such as improves heat treatment mode, from specialty alloy materials.However, find in actual use,
Although the rolling mill lining plate life-span increases after improving, cost is higher, and cost performance is low, not up to preferable service life, can not
Ensure the production efficiency and reliability of milling train.
The content of the invention
It is an object of the invention to provide a kind of technique is simple, cost is cheap, can improve rolling mill lining plate wearability and use
The preparation method of the milling train liner plate in life-span.
The preparation method of the present invention is as follows:
(1) 45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is subtracted by size
Few 1mm continues to process, and after machining, the impurity such as degrease, and dries;
(2) alloyage powder, the chemical composition mass percent of the alloy powder are:C 0.1~0.13%, Si
1.0~1.5%, Cr 14~16%, Co 1.6~1.7%, Mn 1.2~1.6%, surplus Fe, the granularity of powder for 125~
325 mesh;
(3) above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, be well mixed;
(4) the identical size liner plate combination of two that will be processed, by the counter sink bolt on liner plate by two blocks of liner plates
The mode that non-working surface is in contact is fixed together;
(5) the fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, when ensureing cladding alloy powder
Do not destroy counter sink and bolt;
(6) fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, the alloy powder of step (2) is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;
(7) using the high-energy light beam of high power semiconductor lasers output, preset alloy powder is scanned, semiconductor swashs
Light device power P=3000~3500W, 2 × 14mm of rectangular light spot, overlapping rate 30~50%, scan velocity V=300~350mm/
Min so that with liner plate substrate surface metal quick metallurgical reaction occurs for alloy powder, is obtained in liner plate working surface uniform
1.5mm thickness alloy wear-resisting layers;
(8) by combinations thereof liner plate turn-over, in two pieces of combined lining boards on another piece of working face repeat step (6) and
(7), also uniform 1.5mm thickness alloy wear-resisting layer is obtained in its working surface;
(9) two pieces of combined lining boards of splitting step (8), then finished by surface grinding machine, stock removal 0.5mm,
Obtain size and surface smoothness meets the milling train liner plate of drawing requirement.
Under semiconductor laser output high-energy light beam effect, alloy powder occurs quick metallurgical with substrate surface metal
Reaction, around under the cooling effect of normal temperature metal, obtain that crystal grain is tiny, alloy enhanced layer of dense structure, alloy strengthening
Layer hardness reaches more than HRC61, flawless, stomata and inclusion defect, reinforcing liner plate has been made, hence it is evident that improve service life.
The present invention has the following advantages that compared with prior art:
1st, present invention process is simple, energy-conserving and environment-protective, pollution-free.
2nd, obtained reinforcing milling train liner plate, has preferable wear resistance, simultaneously as alloy cladding layer tissue causes
Close, composition is uniform, also with outstanding anticorrosive and anti-fatigue performance, realizes the reinforcing of rolling mill lining plate, extends using the longevity
Life, and then milling train production efficiency is improved, reduce entreprise cost.
3rd, the obtained reinforcing more traditional high Cr-containing alloy entirety material of liner plate service life and high Mn alloys entirety material liner plate
More than 2 times are improved, while has saved precious metal.
Brief description of the drawings
Fig. 1 is the schematic front view for treating laser melting coating liner plate.
Fig. 2 is Fig. 1 side elevational cross-section schematic diagram.
Fig. 3 is that the main view of combined lining board after laser melting coating of the present invention is strengthened cuts open schematic diagram.
In figure:1- liner plates working face, 2- alloy enhanced layers.
Embodiment
Embodiment 1
As shown in figure 1, being processed to 45 steel boards by liner plate drawing, the working surface of liner plate contact movement part is pressed
Size reduces 1mm and continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder
Chemical composition mass percent be:C 0.1%, Si 1.0%, Cr 14%, Co 1.6%, Mn 1.2%, surplus Fe, powder
The granularity at end is 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;By what is processed
Identical size liner plate combination of two, consolidate by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
It is scheduled on together (as depicted in figs. 1 and 2);The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensures laser
Counter sink and bolt are not destroyed during cladding alloy powder;Fix two pieces of combined lining boards are placed on high-power semiconductor laser
On machining tool, using preset powdering mode, alloy powder is uniformly laid on the working face 1 of one of liner plate, bisque is thick
Spend for 2.5mm;The high-energy light beam exported using high power semiconductor lasers, scans preset alloy powder, semiconductor swashs
Light device power P=3000W, 2 × 14mm of rectangular light spot, overlapping rate 30%, scan velocity V=300mm/min so that alloy powder
Quick metallurgical reaction occurs with liner plate substrate surface metal, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;
By combinations thereof liner plate turn-over, another piece of working face repeats the above steps in two pieces of combined lining boards, also in its working surface
Obtain uniform 1.5mm thickness alloy enhanced layer 2 (as shown in Figure 3);Two pieces of combined lining boards after cladding are split, then pass through flat stone mill
Bed is finished, stock removal 0.5mm, is formed 1mm thickness alloy enhanced layers in liner plate working surface, is obtained size and surface light
Cleanliness meets the milling train liner plate of drawing requirement.
Embodiment 2
45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is reduced by size
1mm continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder chemistry into
Point mass percent is:C 0.13%, Si 1.5%, Cr 16%, Co 1.7%, Mn 1.6%, surplus Fe, the grain of powder
Spend for 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;The identical chi that will be processed
Very little liner plate combination of two, one is fixed on by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
Rise;The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensure cladding alloy powder when do not destroy it is heavy
Head bore and bolt;Fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, alloy powder is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;Utilize high-power half
The high-energy light beam of conductor laser output, scans preset alloy powder, semiconductor laser power P=3500W, rectangular light
2 × 14mm of spot, overlapping rate 50%, scan velocity V=350mm/min so that alloy powder occurs with liner plate substrate surface metal
Quick metallurgical reaction, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;Combinations thereof liner plate is turned out,
Another piece of working face repeats the above steps in two pieces of combined lining boards, also obtains the thick conjunctions of uniform 1.5mm in its working surface
Golden strengthening layer;Two pieces of combined lining boards after cladding are split, then are finished by surface grinding machine, stock removal 0.5mm, are being served as a contrast
Plate working surface forms 1mm thickness alloy enhanced layers, obtains size and surface smoothness meets the milling train liner plate of drawing requirement.
Embodiment 3:
45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is reduced by size
1mm continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder chemistry into
Point mass percent is:C 0.12%, Si 1.3%, Cr 16%, Co 1.7%, Mn 1.6%, surplus Fe, the grain of powder
Spend for 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;The identical chi that will be processed
Very little liner plate combination of two, one is fixed on by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
Rise;The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensure cladding alloy powder when do not destroy it is heavy
Head bore and bolt;Fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, alloy powder is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;Utilize high-power half
The high-energy light beam of conductor laser output, scans preset alloy powder, semiconductor laser power P=3300W, rectangular light
2 × 14mm of spot, overlapping rate 35%, scan velocity V=320mm/min so that alloy powder occurs with liner plate substrate surface metal
Quick metallurgical reaction, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;Combinations thereof liner plate is turned out,
Another piece of working face repeats the above steps in two pieces of combined lining boards, also obtains the thick conjunctions of uniform 1.5mm in its working surface
Golden strengthening layer;Two pieces of combined lining boards after cladding are split, then are finished by surface grinding machine, stock removal 0.5mm, are being served as a contrast
Plate working surface forms 1mm thickness alloy enhanced layers, obtains size and surface smoothness meets the milling train liner plate of drawing requirement.
Embodiment 4:
45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is reduced by size
1mm continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder chemistry into
Point mass percent is:C 0.11%, Si 1.4%, Cr 14%, Co 1.7%, Mn 1.6%, surplus Fe, the grain of powder
Spend for 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;The identical chi that will be processed
Very little liner plate combination of two, one is fixed on by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
Rise;The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensure cladding alloy powder when do not destroy it is heavy
Head bore and bolt;Fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, alloy powder is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;Utilize high-power half
The high-energy light beam of conductor laser output, scans preset alloy powder, semiconductor laser power P=3200W, rectangular light
2 × 14mm of spot, overlapping rate 30%, scan velocity V=310mm/min so that alloy powder occurs with liner plate substrate surface metal
Quick metallurgical reaction, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;Combinations thereof liner plate is turned out,
Another piece of working face repeats the above steps in two pieces of combined lining boards, also obtains the thick conjunctions of uniform 1.5mm in its working surface
Golden strengthening layer;Two pieces of combined lining boards after cladding are split, then are finished by surface grinding machine, stock removal 0.5mm, are being served as a contrast
Plate working surface forms 1mm thickness alloy enhanced layers, obtains size and surface smoothness meets the milling train liner plate of drawing requirement.
Embodiment 5:
45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is reduced by size
1mm continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder chemistry into
Point mass percent is:C 0.10%, Si 1.2%, Cr 15%, Co 1.7%, Mn 1.4%, surplus Fe, the grain of powder
Spend for 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;The identical chi that will be processed
Very little liner plate combination of two, one is fixed on by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
Rise;The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensure cladding alloy powder when do not destroy it is heavy
Head bore and bolt;Fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, alloy powder is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;Utilize high-power half
The high-energy light beam of conductor laser output, scans preset alloy powder, semiconductor laser power P=3250W, rectangular light
2 × 14mm of spot, overlapping rate 40%, scan velocity V=320mm/min so that alloy powder occurs with liner plate substrate surface metal
Quick metallurgical reaction, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;Combinations thereof liner plate is turned out,
Another piece of working face repeats the above steps in two pieces of combined lining boards, also obtains the thick conjunctions of uniform 1.5mm in its working surface
Golden strengthening layer;Two pieces of combined lining boards after cladding are split, then are finished by surface grinding machine, stock removal 0.5mm, are being served as a contrast
Plate working surface forms 1mm thickness alloy enhanced layers, obtains size and surface smoothness meets the milling train liner plate of drawing requirement.
Embodiment 6:
45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is reduced by size
1mm continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder chemistry into
Point mass percent is:C 0.12%, Si 1.2%, Cr 14%, Co 1.6%, Mn 1.4%, surplus Fe, the grain of powder
Spend for 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;The identical chi that will be processed
Very little liner plate combination of two, one is fixed on by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
Rise;The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensure cladding alloy powder when do not destroy it is heavy
Head bore and bolt;Fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, alloy powder is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;Utilize high-power half
The high-energy light beam of conductor laser output, scans preset alloy powder, semiconductor laser power P=3400W, rectangular light
2 × 14mm of spot, overlapping rate 30%, scan velocity V=340mm/min so that alloy powder occurs with liner plate substrate surface metal
Quick metallurgical reaction, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;Combinations thereof liner plate is turned out,
Another piece of working face repeats the above steps in two pieces of combined lining boards, also obtains the thick conjunctions of uniform 1.5mm in its working surface
Golden strengthening layer;Two pieces of combined lining boards after cladding are split, then are finished by surface grinding machine, stock removal 0.5mm, are being served as a contrast
Plate working surface forms 1mm thickness alloy enhanced layers, obtains size and surface smoothness meets the milling train liner plate of drawing requirement.
Embodiment 7:
45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is reduced by size
1mm continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder chemistry into
Point mass percent is:C 0.12%, Si 1.4%, Cr 15%, Co 1.6%, Mn 1.4%, surplus Fe, the grain of powder
Spend for 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;The identical chi that will be processed
Very little liner plate combination of two, one is fixed on by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
Rise;The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensure cladding alloy powder when do not destroy it is heavy
Head bore and bolt;Fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, alloy powder is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;Utilize high-power half
The high-energy light beam of conductor laser output, scans preset alloy powder, semiconductor laser power P=3450W, rectangular light
2 × 14mm of spot, overlapping rate 50%, scan velocity V=330mm/min so that alloy powder occurs with liner plate substrate surface metal
Quick metallurgical reaction, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;Combinations thereof liner plate is turned out,
Another piece of working face repeats the above steps in two pieces of combined lining boards, also obtains the thick conjunctions of uniform 1.5mm in its working surface
Golden strengthening layer;Two pieces of combined lining boards after cladding are split, then are finished by surface grinding machine, stock removal 0.5mm, are being served as a contrast
Plate working surface forms 1mm thickness alloy enhanced layers, obtains size and surface smoothness meets the milling train liner plate of drawing requirement.
Embodiment 8:
45 steel boards are processed by liner plate drawing, the working surface of liner plate contact movement part is reduced by size
1mm continues to process, and after machining, the impurity such as degrease, and dries;Alloyage powder, the alloy powder chemistry into
Point mass percent is:C 0.13%, Si 1.5%, Cr 16%, Co 1.7%, Mn 1.2%, surplus Fe, the grain of powder
Spend for 125~325 mesh;Above-mentioned alloy powder is mixed 3 hours with three-dimensional meal mixer, is well mixed;The identical chi that will be processed
Very little liner plate combination of two, one is fixed on by way of two pieces of liner plate non-working surfaces are in contact by the counter sink on liner plate with bolt
Rise;The fast dry powder become reconciled is filled in the counter sink for install bolt, is dried, ensure cladding alloy powder when do not destroy it is heavy
Head bore and bolt;Fix two pieces of combined lining boards are placed on high-power semiconductor laser machining tool, using preset paving
Powder mode, alloy powder is uniformly laid on to the working surface of one of liner plate, powder layer thickness 2.5mm;Utilize high-power half
The high-energy light beam of conductor laser output, scans preset alloy powder, semiconductor laser power P=3150W, rectangular light
2 × 14mm of spot, overlapping rate 35%, scan velocity V=300mm/min so that alloy powder occurs with liner plate substrate surface metal
Quick metallurgical reaction, uniform 1.5mm thickness alloy wear-resisting layer is obtained in liner plate working surface;Combinations thereof liner plate is turned out,
Another piece of working face repeats the above steps in two pieces of combined lining boards, also obtains the thick conjunctions of uniform 1.5mm in its working surface
Golden strengthening layer;Two pieces of combined lining boards after cladding are split, then are finished by surface grinding machine, stock removal 0.5mm, are being served as a contrast
Plate working surface forms 1mm thickness alloy enhanced layers, obtains size and surface smoothness meets the milling train liner plate of drawing requirement.