CN109332390A - 304 stainless steel rolls of one kind and processing method - Google Patents
304 stainless steel rolls of one kind and processing method Download PDFInfo
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- CN109332390A CN109332390A CN201811423994.2A CN201811423994A CN109332390A CN 109332390 A CN109332390 A CN 109332390A CN 201811423994 A CN201811423994 A CN 201811423994A CN 109332390 A CN109332390 A CN 109332390A
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- roll
- roll body
- stainless steel
- sealing plate
- plug
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The present invention provides a kind of 304 stainless steel rolls, including roll body, is set as hollow cavity inside roll body, roll body further includes plug, be fixedly connected between plug and roll body inner wall and roll shaft outer wall, plug is prepared by gray cast iron along one roll shaft of axial penetration.The present invention also provides the processing methods of 304 stainless steel rolls, comprising the following steps: S1: is prepared into roll body；S2: the stainless steel shaft to match with roller mill is prepared；S3: preparation ladder platform；S4: the sealing plate matched is determined；S5: casting prepares plug；S6: sealing plate sealing end；S7: by seal plate welding on roll body；S8: amendment end face；S9: polishing roll body outer rim forms 304 stainless steel rolls.The purpose of the present invention is to provide a kind of 304 stainless steel rolls and processing methods, it is intended to which binding force, the toughness for improving 304 stainless steel roll welds avoid weld seam from removing roll, to improve the intensity and service life of roll.
Description
Technical field
The present invention relates to the processing technique field of 304 stainless steel rolls, in particular to a kind of 304 stainless steel rolls and processing
Method.
Background technique
Roll is the tool for making stocking generate plastic deformation, is the important consumption portion for determining rolling mill efficiency and mill bar quality
Part.Roll is the important part on rolling mill, and the pressure that generates when being rolled using a pair of or one group of roll rolls stone roller food.It leads
Bear Dynamic And Static Loads when rolling, the influence of abrasion and temperature change.
The stainless steel roll in the 304 of the prior art, roll body and roll shaft are 304 stainless steel materials, and roll body and roll shaft pass through method
Orchid interference fit, roll shaft and flange welding.The roll of the prior art has the disadvantage that (1) is constituted between ring flange and roll body
Hollow structure, roll body end walls thickness, roll are easy to produce Bending Deformation when rolling and grinding food, and the active force of deformation is transmitted to end
When portion, since the wall thickness at roll body both ends is thin, intensity is low, and bending torque easily makes end generate irreversible bending deformation, and damage is set
It is standby；(2) it is only welded to connect by ring flange and roll inner wall, the binding force of ring flange and roll weld seam is small, works and produces in roll
When raw Bending Deformation tendency, welding seam toughness is small, is easy to produce tearing crack or even removes roll, damages equipment.
It is strong therefore, it is necessary to design a kind of binding force, reduce 304 stainless steel rolls and its processing of weld seam removing roll probability
Method.
Summary of the invention
The purpose of the present invention is to provide a kind of 304 stainless steel rolls and processing methods, it is intended to improve 304 stainless steel rolls
Binding force, the toughness of weld avoid weld seam from removing roll.
The present invention provides a kind of 304 stainless steel rolls, including roll body, is set as hollow cavity, the roller inside the roll body
Body further includes plug, is fixedly connected between plug and roll body inner wall and roll shaft outer wall along one roll shaft of axial penetration, the plug
It is prepared by gray cast iron.
As a further improvement of the present invention, roll body is internally provided with ladder platform, and plug is fixed on ladder platform by sealing plate
Between sealing plate, sealing plate and roll body are welded using welding rod, and weld seam is formed between sealing plate and roll body.
As a further improvement of the present invention, interference fit is fixed between plug and roll body inner wall and roll shaft outer wall connects
It connects.
As a further improvement of the present invention, the chemical component and content of sealing plate are C:0.012%-0.015%, Si:
0.08%-0.1%, Mn:1.5%-2.0%, P:0.03%-0.045%, S:0.002%-0.003%, Cr:16%-18%,
Co:0.1%-0.3%, Ni:8%-12%, Mo:2.0%-3.5%, Al:0.5%-0.7%, Fe surplus.
As a further improvement of the present invention, the chemical component and content of welding rod are C:0.10%-0.15%, Mn:
0.5%-2.5%, Si:0.8%-1.0%, Cr:22.0%-25.0%, Ni:12.0%-14.0%, Mo:2.0%-3.0%,
Co:8.0%-10%, Al:0.8%-1.0%, Fe surplus.
As a further improvement of the present invention, the design parameter of welding are as follows: carried out in the welding rod for selecting diameter 3.2-4.0mm
Welding, forms weld seam, welding current 90-120A, arc voltage 23-25V, speed of welding 150-160mm/ between sealing plate and roll body
The interlayer temperature of min, welding are controlled at 150 DEG C -160 DEG C.
The present invention also provides a kind of processing methods of 304 stainless steel rolls, comprising the following steps:
S1: selection stainless steel tube is sawed-off, and regular length, sanding and polishing is prepared into roll body；
S2: the stainless steel roll shaft to match with roller mill is prepared；
S3: roll body stainless steel tube is processed in boring, prepares ladder platform；
S4: casting forms sealing plate plate, determines the sealing plate matched according to the internal diameter vehicle of roll body；
S5: casting prepares plug；
S6: plug and roll body are assembled, sealing plate sealing end；
S7: 6 welding holes are drilled through in sealing plate and roll body junction, by seal plate welding on roll body；
S8: amendment end face；
S9: polishing roll body outer rim forms 304 stainless steel rolls.
Compared with prior art, the invention has the following advantages:
1. being additionally provided with plug between 304 stainless steel roll roll bodies of the invention and roll shaft, the material of plug is gray iron, gray iron
Intensity is higher compared with 304 stainless steel materials, and by interference fit between plug and roll body inner wall and roll shaft outer wall, no
In the presence of the cavity structure in the prior art between ring flange and roll, the contact area of plug and roll is bigger, can effectively improve
The intensity of roll avoids roll bending from being transferred to end and generates non-reversible deformation.
2. roll body of the present invention is internally provided with ladder platform, plug is fixed between ladder platform and sealing plate by sealing plate, sealing plate
It is welded with roll body, plug is further limited in the movement of roll axial direction by this structure, is gray iron high intensity material in plug
It is cooperateed under the action of matter and further increases plug to the supporting function of roll end, increased the intensity of roll end, reduce end
Portion bends the probability of torque, to avoid weld seam because bending torque removes roll.
3. the material and group of welding rod of the invention are divided into C:0.10%-0.15%, Mn:0.5%-2.5%, Si:0.8%-
1.0%, Cr:22.0%-25.0%, Ni:12.0%-14.0%, Mo:2.0%-3.0%, Co:8.0%-10%, Al:
0.8%-1.0%, when being welded using this welding rod, Co, Ni and Al element are fitted into weld seam, can effectively cooperate with raising weld seam
Toughness, avoid roll from being bent, welding seam toughness and binding force not enough remove weld seam.
4. weld seam is easy to generate brittle martensite and Wei Shi due to the dilution of the alloying elements such as chromium and nickel in welding process
Body tissue causes to crack at weld seam or melt run, reduces the mechanical property of welding point, and welding rod of the invention has
Good cracking resistance and weldability, and the dilution of the alloying elements such as chromium and nickel and the diffusion of carbon can be effectively controlled,
The toughness of weld seam and the binding force with steel are improved, avoids roll from being bent, welding seam toughness and binding force not enough remove weld seam.
5. the chemical component and content of sealing plate of the invention are C:0.012%-0.015%, Si:0.08%-0.1%, Mn:
1.5%-2.0%, P:0.03%-0.045%, S:0.002%-0.003%, Cr:16%-18%, Co:0.1%-0.3%,
Ni:8%-12%, Mo:2.0%-3.5%, Al:0.5%-0.7%, Fe surplus, on the one hand, there is excellent toughness and corrosion resistant
Corrosion energy；On the other hand, the Al that the Al element in welding rod is formed with script Al element in sealing plate4C3Mutually strengthen, collaboration improves weldering
The toughness of seam.
6. one aspect of the present invention uses material to enhance the intensity of roll as plug for low-cost gray iron, reaching mesh
Intensity when reduce production cost, another aspect roll is after processing technology is handled, and the 304 of roller surface and the prior art are not
Steel roll appearance of becoming rusty and surface smoothness are completely the same, appearance looks elegant, and prospects for commercial application is good.
Detailed description of the invention
Fig. 1 is the partial cutaway schematic of 304 stainless steel rolls of the invention.
In figure: roll body 1, roll shaft 2, plug 3, ladder platform 4, sealing plate 5, weld seam 6.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment.Obviously, described
Embodiment be only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, ability
Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to guarantor of the present invention
The range of shield.
The present invention discloses a kind of 304 stainless steel rolls and processing method, specific embodiment are as follows:
Embodiment 1
The present invention provides a kind of 304 stainless steel rolls, including roll body 1, is set as hollow cavity inside the roll body 1, described
Roll body 1 further includes plug 3, is fixedly connected between 2 outer wall of plug 3 and 1 inner wall of roll body and roll shaft along one roll shaft 2 of axial penetration,
The plug 3 is prepared by gray cast iron.
As a further improvement of the present invention, roll body 1 is internally provided with ladder platform 4, and plug 3 is fixed on rank by sealing plate 5
Between halfpace 4 and sealing plate 5, sealing plate 5 and roll body 1 are welded using welding rod, and weld seam 6 is formed between sealing plate and roll body 1.
The present invention also provides a kind of processing methods of 304 stainless steel rolls, comprising the following steps:
S1: selection stainless steel tube is sawed-off, and regular length, sanding and polishing is prepared into the roll body 1 of roll；
S2: it is same, it is fixed length, sawed-off, prepare the stainless steel roll shaft 2 to match with roller mill；
S3: boring is processed inside 1 stainless steel tube of roll body, and boring goes out ladder platform 4；
S4: being C:0.012%, Si:0.08%, Mn:1.5%, P:0.03%, S:0.002%, Cr according to weight ratio:
16%, Co:0.1%, Ni:8%, Mo:2.0%, Al:0.5%, Fe surplus, prepare founding materials, and each group is placed in Medium frequency induction
Melting in furnace, smelting temperature are 500 DEG C, and smelting time is 30 minutes, smelts to chemical composition ranges and meets the requirements, and casting is formed
5 plate of sealing plate determines the sealing plate 5 matched according to the internal diameter vehicle of roll body 1；
S5: casting prepares plug 3；
S6: plug 3 and roll body 1 are assembled, and make interference fit fixation between 2 outer wall of plug 3 and 1 inner wall of roll body and roll shaft
Connection, sealing plate 5 block；
S7: drilling through 6 welding holes in sealing plate 5 and 1 junction of roll body, the welding rod of diameter 3.2mm selected to be welded, welding electricity
90A, arc voltage 23V, speed of welding 150mm/min are flowed, the interlayer temperature of welding controls at 150 DEG C DEG C, sealing plate 5 is welded on
On roll body 1, weld seam 6 is formed between sealing plate and roll body 1, wherein the chemical component and content of welding rod are C:0.10%, Mn:0.5%-
2.5%, Si:0.8%, Cr:22.0%, Ni:12.0%, Mo:2.0%, Co:8.0%, Al:0.8%, Fe surplus,；
S8: amendment end face；
S9: polishing 1 outer rim of roll body forms 304 stainless steel rolls.
SEM characterization is carried out to sample, the metallographic structure in weld seam 6 is dendrite tissue, and wherein ferrite is in skeletal like.
Embodiment 2
The present invention provides a kind of 304 stainless steel rolls, including roll body 1, is set as hollow cavity inside the roll body 1, described
Roll body 1 further includes plug 3, is fixedly connected between 2 outer wall of plug 3 and 1 inner wall of roll body and roll shaft along one roll shaft 2 of axial penetration,
The plug 3 is prepared by gray cast iron.
As a further improvement of the present invention, roll body 1 is internally provided with ladder platform 4, and plug 3 is fixed on rank by sealing plate 5
Between halfpace 4 and sealing plate 5, sealing plate 5 and roll body 1 are welded using welding rod, and weld seam 6 is formed between sealing plate and roll body 1.
The present invention also provides a kind of processing methods of 304 stainless steel rolls, comprising the following steps:
S1: selection stainless steel tube is sawed-off, and regular length, sanding and polishing is prepared into the roll body 1 of roll；
S2: it is same, it is fixed length, sawed-off, prepare the stainless steel roll shaft 2 to match with roller mill；
S3: boring is processed inside 1 stainless steel tube of roll body, and boring goes out ladder platform 4；
S4: being C:0.015%, Si:0.1%, Mn:2.0%, P:0.045%, S:0.003%, Cr according to weight ratio:
18%, Co:0.3%, Ni:12%, Mo:3.5%, Al:0.7%, Fe surplus, prepare founding materials, and each group is placed in intermediate frequency sense
Melting in furnace is answered, smelting temperature is 500 DEG C, and smelting time is 30 minutes, and smelting meets the requirements to chemical composition ranges, pours cast
At 5 plate of sealing plate, the sealing plate 5 matched is determined according to the internal diameter vehicle of roll body 1；
S5: casting prepares plug 3；
S6: plug 3 and roll body 1 are assembled, and make interference fit fixation between 2 outer wall of plug 3 and 1 inner wall of roll body and roll shaft
Connection, sealing plate 5 block；
S7: drilling through 6 welding holes in sealing plate 5 and 1 junction of roll body, the welding rod of diameter 4.0mm selected to be welded, welding electricity
120A, arc voltage 25V, speed of welding 160mm/min are flowed, the interlayer temperature of welding controls at 160 DEG C, sealing plate 5 is welded on
On roll body 1, between sealing plate and roll body 1 formed weld seam 6, wherein the chemical component and content of welding rod be C:0.15%, Mn:2.5%,
Si:1.0%, Cr:25.0%, Ni:14.0%, Mo:3.0%, Co:10%, Al:1.0%, Fe surplus；
S8: amendment end face；
S9: polishing 1 outer rim of roll body forms 304 stainless steel rolls.
SEM characterization is carried out to sample, the metallographic structure in weld seam 6 is dendrite tissue, and wherein ferrite is in skeletal like.
Embodiment 3
The present invention provides a kind of 304 stainless steel rolls, including roll body 1, is set as hollow cavity inside the roll body 1, described
Roll body 1 further includes plug 3, is fixedly connected between 2 outer wall of plug 3 and 1 inner wall of roll body and roll shaft along one roll shaft 2 of axial penetration,
The plug 3 is prepared by gray cast iron.
As a further improvement of the present invention, roll body 1 is internally provided with ladder platform 4, and plug 3 is fixed on rank by sealing plate 5
Between halfpace 4 and sealing plate 5, sealing plate 5 and roll body 1 are welded using welding rod, and weld seam 6 is formed between sealing plate and roll body 1.
The present invention also provides a kind of processing methods of 304 stainless steel rolls, comprising the following steps:
S1: selection stainless steel tube is sawed-off, and regular length, sanding and polishing is prepared into the roll body 1 of roll；
S2: it is same, it is fixed length, sawed-off, prepare the stainless steel roll shaft 2 to match with roller mill；
S3: boring is processed inside 1 stainless steel tube of roll body, and boring goes out ladder platform 4；
S4: being C:0.013%, Si:0.09%, Mn:1.8%, P:0.04%, S:0.0025%, Cr according to weight ratio:
17%, Co:0.2%, Ni:10%, Mo:3.0%, Al:0.6%, Fe surplus, prepare founding materials, and each group is placed in intermediate frequency sense
Melting in furnace is answered, smelting temperature is 500 DEG C, and smelting time is 30 minutes, and smelting meets the requirements to chemical composition ranges, pours cast
At 5 plate of sealing plate, the sealing plate 5 matched is determined according to the internal diameter vehicle of roll body 1；
S5: casting prepares plug 3；
S6: plug 3 and roll body 1 are assembled, and make interference fit fixation between 2 outer wall of plug 3 and 1 inner wall of roll body and roll shaft
Connection, sealing plate 5 block；
S7: drilling through 6 welding holes in sealing plate 5 and 1 junction of roll body, the welding rod of diameter 3.5mm selected to be welded, welding electricity
100A, arc voltage 24V, speed of welding 155mm/min are flowed, the interlayer temperature of welding controls at 155 DEG C, sealing plate 5 is welded on
On roll body 1, between sealing plate and roll body 1 formed weld seam 6, wherein the chemical component and content of welding rod be C:0.13%, Mn:1.5%,
Si:0.9%, Cr:23.0%, Ni:13.0%, Mo:2.5%, Co:9%, Al:0.9%, Fe surplus；
S8: amendment end face；
S9: polishing 1 outer rim of roll body forms 304 stainless steel rolls.
SEM characterization is carried out to sample, the metallographic structure in weld seam 6 is dendrite tissue, and wherein ferrite is in skeletal like.
The stainless steel roll appearance in 304 prepared under 1-3 processing method of the embodiment of the present invention is smoothly bright, beautiful zero defect,
Product meets the related request in national standard.
Prepared by test sample to 304 stainless steel rolls in embodiment 1- embodiment 3, mechanical property see the table below 1.
The mechanical property of the stainless steel roll of table 1304
The hardness of roll under present invention preparation is big, and the body of roll is generally more than 62HSD, because setting between roll body 1 and roll shaft 2
It is equipped with plug 3, the material of plug 3 is gray iron, and gray iron intensity compared with 304 stainless steel materials is higher, and plug 3 and roll body 1
By interference fit between 2 outer wall of inner wall and roll shaft, there is no the cavity structure in the prior art between ring flange and roll,
Plug 3 and the contact area of roll are bigger, can effectively improve the intensity of roll, and avoiding roll bending from being transferred to end generation can not
Inverse deformation.And roll body 1 is internally provided with ladder platform 4, and plug 3 is fixed between ladder platform 4 and sealing plate 5 by sealing plate 5, sealing plate
5 with roll body 1 weld, by this structure further limit plug 3 roll mandrel 2 to movement, plug 3 be gray iron it is high-strength
It is cooperateed under the action of degree material and further increases plug 3 to the supporting function of roll end, increase the intensity of roll end, because
The hardness of this roll body 1 is big, and this structure can reduce end and bend the probability of torque, to avoid weld seam 6 because of bending
Torque removes roll, so the tensile strength of the body of roll is significantly improved；Also more than 42HSD, roll neck resists the hardness of roll neck
The minimum 415.7Mpa of tensile strength, being not only as plug 3 can increase the tensile strength of roll neck, also be attributed to the fact that three aspects are former
Cause: 1, when being welded using this welding rod, Co, Ni and Al element are fitted into weld seam 6, can effectively be cooperateed with and be improved the tough of weld seam 6
Property, avoid roll from being bent, 6 toughness of weld seam and binding force not enough remove weld seam 6；2, welding rod has good cracking resistance and weldering
Connecing property, and can effectively control the dilution of the alloying elements such as chromium and nickel and the diffusion of carbon, improve weld seam 6 toughness and with
The binding force of steel, avoids roll from being bent, and 6 toughness of weld seam and binding force not enough remove weld seam 6；3, chemical component of the present invention
Sealing plate has excellent toughness and corrosion resistance energy, the Al4C3 phase that the Al element in welding rod is formed with script Al element in sealing plate
Mutually strengthen, collaboration improves the toughness of weld seam 6.The toughness of roll neck can be dramatically increased using preparation method of the invention, improve roll neck
The binding force of weld seam on central roll shoulder, can increase the toughness of weld seam, and weld seam is effectively avoided to remove roll body.
A kind of 304 stainless steel roll provided by the present invention and processing method are described in detail above.Herein
Applying specific embodiment, principle and implementation of the present invention are described, and the explanation of above example is only intended to sides
Assistant solves method and its core concept of the invention.It should be pointed out that for those skilled in the art, not
, can be with several improvements and modifications are made to the present invention under the premise of being detached from the principle of the invention, these improvement and modification are also fallen into
In the protection scope of the claims in the present invention.
Claims (7)
1. a kind of 304 stainless steel rolls, including roll body (1), the roll body (1) is internal to be set as hollow cavity, roll body (1) edge
One roll shaft of axial penetration (2), it is characterised in that: further include plug (3), plug (3) and roll body (1) inner wall and roll shaft (2) outer wall
Between be fixedly connected with, the plug (3) is prepared by gray cast iron.
2. a kind of 304 stainless steel roll according to claim 1, it is characterised in that: roll body (1) is internally provided with ladder platform
(4), plug (3) is fixed between ladder platform (4) and sealing plate (5), and sealing plate (5) and roll body (1) are welded using welding rod, sealing plate (5)
Weld seam (6) are formed between roll body (1).
3. a kind of 304 stainless steel roll according to claim 1, it is characterised in that: in the plug (3) and roll body (1)
Interference fit is fixedly connected between wall and roll shaft (2) outer wall.
4. a kind of 304 stainless steel roll according to claim 2, it is characterised in that: the chemical component of the sealing plate (5) and
Content is C:0.012%-0.015%, Si:0.08%-0.1%, Mn:1.5%-2.0%, P:0.03%-0.045%, S:
0.002%-0.003%, Cr:16%-18%, Co:0.1%-0.3%, Ni:8%-12%, Mo:2.0%-3.5%, Al:
0.5%-0.7%, Fe surplus.
5. a kind of 304 stainless steel roll according to claim 2, it is characterised in that: the chemical component of the welding rod and contain
Amount is C:0.10%-0.15%, Mn:0.5%-2.5%, Si:0.8%-1.0%, Cr:22.0%-25.0%, Ni:12.0%-
14.0%, Mo:2.0%-3.0%, Co:8.0%-10%, Al:0.8%-1.0%, Fe surplus.
6. according to any stainless steel roll of one kind 304 of claim 2,4 or 5, it is characterised in that: the welding it is specific
Parameter are as follows: it selects the welding rod of diameter 3.2-4.0mm to be welded, forms weld seam (6) between sealing plate (5) and roll body (1), welding electricity
90-120A, arc voltage 23-25V, speed of welding 150-160mm/min are flowed, the interlayer temperature of welding is controlled at 150 DEG C -160
℃。
7. a kind of processing method of -5 any 304 stainless steel rolls according to claim 1, it is characterised in that: including with
Lower step:
S1: selection stainless steel tube is sawed-off, and regular length, sanding and polishing is prepared into roll body (1)；
S2: the stainless steel roll shaft (2) to match with roller mill is prepared；
S3: roll body (1) stainless steel tube is processed in boring, prepares ladder platform (4)；
S4: casting forms sealing plate (5) plate, and the sealing plate (5) matched is determined according to the internal diameter vehicle of roll body (1)；
S5: casting prepares plug (3)；
S6: plug (3) and roll body (1) are assembled, sealing plate (5) sealing end；
S7: 6 welding holes are drilled through in sealing plate (5) and roll body (1) junction, sealing plate (5) is welded on roll body (1)；
S8: amendment end face；
S9: polishing roll body (1) outer rim forms 304 stainless steel rolls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811423994.2A CN109332390B (en) | 2018-11-27 | 2018-11-27 | 304 stainless steel roller and processing method |
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|---|---|---|---|
| CN201811423994.2A CN109332390B (en) | 2018-11-27 | 2018-11-27 | 304 stainless steel roller and processing method |
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