CN109079146A - A kind of preparation method of hard alloy long cylinder - Google Patents
A kind of preparation method of hard alloy long cylinder Download PDFInfo
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- CN109079146A CN109079146A CN201810996650.4A CN201810996650A CN109079146A CN 109079146 A CN109079146 A CN 109079146A CN 201810996650 A CN201810996650 A CN 201810996650A CN 109079146 A CN109079146 A CN 109079146A
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- long cylinder
- hard alloy
- face
- preparation
- idiosome
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F8/00—Manufacture of articles from scrap or waste metal particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
Abstract
The invention discloses a kind of preparation methods of hard alloy long cylinder, comprising the following steps: (1) preparation of reworked material；(2) preparation of hard alloy long cylinder idiosome；(3) end face processes；(4) it assembles；(5) it is sintered.Present invention employs waste hand alloy materials in roll production process as raw material, is handled by the end face to alloy long cylinder idiosome, forms it into L-type end face, and end face is seamless agree with by way of, so that it is spliced into the hard alloy long cylinder of required specification.Seamless agree with of L-type end face agrees with compared to plane, it is possible to increase the contact area of contact surface, and the bite force of contact surface can be increased, make it after sintering, both can prepare hard alloy long cylinder according to required length, and nor affect on the performance of long cylinder.Utilization again present invention employs waste hand alloy material as raw material realization waste material, can effectively save cost.
Description
Technical field
The invention belongs to CEMENTED CARBIDE PRODUCTION preparation fields, and in particular to a kind of preparation method of hard alloy long cylinder.
Background technique
Hard alloy long cylinder belongs to large-sized special-shaped product in hard metal article, is mainly used for rolling sheet metal (band
Steel), it is that one kind makes (stocking) metal generate the tool of plastic deformation, and determines the important consumption of rolling mill efficiency and mill bar quality
Component.Its price is the three-to-four-fold of same trade mark conventional cemented carbide roll, and profit is very considerable.
But hard alloy long cylinder is much bigger compared to common dimension of roller, and general length is all on the left side 1200-1600mm
It is right.This is very high to the size requirement of the production equipment of hard alloy roll producer, and specially introducing or improve equipment increases
Manufacturing cost, and influence production efficiency；So needing one kind to can solve macrotype hard alloy long cylinder is limited life by molding equipment
Produce the preparation method of size.
Currently, after being mainly superimposed by muti-piece idiosome plane, vacuum-sintering is carried out for the size of amplification hard alloy,
In 103386417 A of patent CN, after being just surface-treated two pieces of same or different hard alloy idiosomes, carry out
Superposition up and down, then by obtaining the hard metal article of no transition zone after vacuum-sintering.But the side of this plane superposition
Formula, although the size of hard alloy can be expanded, the surface tension of contact is excessive, and bite force is inadequate, the jail of joint face
Soundness is inadequate, easily influences the performance of hard alloy.
Summary of the invention
The object of the present invention is to provide a kind of simple process, production cost is low and does not influence hard alloy cylindrical body performance
The preparation method of hard alloy long cylinder.
The preparation method of this hard alloy long cylinder of the present invention, comprising the following steps:
(1) preparation of reworked material: collecting waste hand alloy material in roll production process, and waste material progress ball mill crushing is obtained
Broken material；Broken material is subjected to burdening calculation, make the Binder Phase of hard alloy in broken material account for the percentage 25 of total weight~
35%, reworked material is then obtained with after drying by wet-milling；
(2) preparation of hard alloy long cylinder idiosome: using the reworked material in step (1) as raw material, pass through isostatic pressing
The hard alloy long cylinder idiosome of technology establishment setting length；
(3) end face processes: the end face of the hard alloy long cylinder idiosome in more steps (2) being processed, hard is made
The end face of alloy long cylinder can carry out between the L-type end face of recess and the L-type end face of protrusion at recess L-type or the L-type of protrusion
Seamless occlusion；Then L-type end face is further finished, makes its finish Ra≤0.04mm；Then to long cylinder hair
The L-type end face of base carries out cleaning treatment, it is desirable that without soot particle and sundries, one layer of acetone then will be coated on end face；
(4) it assembles: by L-type end face processed in step (3), according to length needed for hard alloy cylindrical body, by more
Hard alloy cylindrical body is spliced in such a way that L-type end face bumps are agreed with, and is placed on dedicated groove profile in the horizontal direction
On all wares；
(5) it is sintered: the hard alloy idiosome assembled in step (4) is placed in vacuum pressure furnace, carry out vacuum metallurgy
More hard alloy long cylinder idiosomes are integrated into a root long cylinder idiosome after cooling by heat treatment；By the long cylinder embryo after integration
Body is finished, and makes its finish Ra≤0.04mm to get the hard alloy long cylinder of required specification.
In the step (1), the diameter of broken material answers≤2mm, diameter≤0.4mm of reworked material.
In the step (2), length is set as 700~900mm.
In the step (2), the technological parameter of isostatic pressing are as follows: 170~180MPa of pressure, the pressing time 0.5~
1.5h。
In the step (4), more are 2~3.
In the step (5), vacuum metallurgy heat treatment temperature is 1365~1375 DEG C, and the processing time is 1~2h, vacuum degree
≤0.8Pa.The length of the hard alloy long cylinder of required specification is 1400~1600mm.
Beneficial effects of the present invention: present invention employs waste hand alloy materials in roll production process as raw material, passes through
The end face of alloy long cylinder idiosome is handled, forms it into L-type end face, and end face is seamless agree with by way of, make it
It is spliced into the hard alloy long cylinder of required specification.Seamless agree with of L-type end face agrees with compared to plane, it is possible to increase contact surface
Contact area, and the bite force of contact surface can be increased, make it after sintering, it is long both can to have prepared hard alloy according to required length
Cylinder nor affects on the performance of long cylinder.Utilization again present invention employs waste hand alloy material as raw material realization waste material,
It can effectively save cost.The present invention solves large-scale long cylinder hard metal article and is limited asking for production size by molding equipment
Topic, expands the application range of hard alloy, is especially suitable for the production of large size belt steel roller.
Detailed description of the invention
Fig. 1 hard alloy long cylinder schematic diagram；
Fig. 2 is bonded schematic diagram.
Specific embodiment
Embodiment 1
(1) preparation of reworked material: the semi-finished product hard alloy waste product in roll production process is crushed (crumb size
< 2mm) it collects, broken material is obtained, broken material is subjected to burdening calculation, the Binder Phase of hard alloy in broken material is made to account for total weight
Percentage be 30%, then by wet-milling and it is dry after, obtain reworked material (diameter≤0.4mm).
(2) preparation of hard alloy long cylinder idiosome: being 175MPa in pressure using the reworked material in step (1) as raw material
Under conditions of, isostatic pressing handles 1h, formulates the hard alloy long cylinder idiosome that more root long degree are 900mm.
(3) end face process: according to needed for hard alloy elongated cylinder having a size of 1444mm, by the hard in 2 steps (2)
The end face of alloy long cylinder idiosome is processed, and makes one end end face of a hard alloy long cylinder at recess L-type (L-type end face
The a length of 22mm of short side；The a length of 63mm of long side), the other end face is constant；One end end face of second hard alloy long cylinder is
The L-type of protrusion, the other end face are constant；Seamless occlusion can be carried out between the L-type end face of recess and the L-type end face of protrusion；
Then L-type end face is further finished, makes its finish Ra≤0.04mm；Then to the L-type end face of long cylinder blank
Carry out cleaning treatment, it is desirable that without soot particle and sundries, one layer of acetone then will be coated on end face.
(4) it assembles: the hard alloy circle idiosome that end face processing is crossed in 2 steps (3) is agreed with according to L-type end face bumps
Mode spliced (its connecting method is as shown in Figure 2), and be placed on dedicated all wares in the horizontal direction.
(5) it is sintered: the long cylinder blank assembled being placed in vacuum pressure furnace, carries out vacuum at a temperature of 1375 DEG C
Metallurgy heat treatment 1.5h, vacuum degree≤0.8Pa, two root long cylindrical blanks are integrated into a root long cylindrical blank after cooling, and combine
Place is without obvious layering trace；Then the long cylinder blank of 1444mm long is finished, makes its finish Ra≤0.04mm, i.e.,
Hard alloy long cylinder having a size of 1444 ± 0.15mm needed for obtaining.The schematic diagram of hard alloy cylindrical body manufactured in the present embodiment
As shown in Figure 1.
Embodiment 2
(1) preparation of reworked material: the semi-finished product hard alloy waste product in roll production process is crushed (crumb size
< 2mm) it collects, broken material is obtained, broken material is subjected to burdening calculation, the Binder Phase of hard alloy in broken material is made to account for total weight
Percentage be 35%, then by wet-milling and it is dry after, obtain reworked material (diameter≤0.4mm).
(2) preparation of hard alloy long cylinder idiosome: using the reworked material in step (1) as raw material, it is 175MPa in pressure
Under conditions of, isostatic pressing handles 1h, formulates the hard alloy long cylinder idiosome that more root long degree are 700mm.
(3) end face processes: according to having a size of 1600mm, the hard in 3 steps (2) is closed needed for hard alloy long cylinder
The end face of golden long cylinder idiosome is processed, and makes one end end face of first hard alloy long cylinder at recess L-type (L-type end face
The a length of 22mm of short side；The a length of 63mm of long side), the other end face is constant；One end end face of second hard alloy long cylinder at
Be recessed L-type, and the other end face is processed into the L-type of protrusion, and one end end face of third root hard alloy long cylinder is the L-type of protrusion,
The other end face is constant；Seamless occlusion can be carried out between the L-type end face of recess and the L-type end face of protrusion；Then by L-type end
Face is further finished, its finish Ra≤0.04mm is made；Then the L-type end face of long cylinder green body is carried out at cleaning
Reason, it is desirable that without soot particle and sundries, one layer of acetone then will be coated on end face.
(4) it assembles: the hard alloy cylinder idiosome that L-type end face processing is carried out in 3 steps (3) is recessed according to L-type end face
The convex mode agreed with is spliced, and is placed on dedicated all wares in the horizontal direction；
(5) it is sintered: the long cylinder blank assembled being placed in vacuum pressure furnace, carries out vacuum at a temperature of 1375 DEG C
Metallurgy heat treatment 2 hours, vacuum degree≤0.8Pa, two root long cylindrical blanks are integrated into a root long cylindrical blank after cooling, and combine
Place is without obvious layering trace；Then the long cylinder blank of 1600mm long is finished, makes its finish Ra≤0.04mm, i.e.,
Hard alloy long cylinder having a size of 1600 ± 0.20mm needed for obtaining.
Claims (6)
1. a kind of preparation method of hard alloy long cylinder, comprising the following steps:
(1) preparation of reworked material: collecting waste hand alloy material in roll production process, and waste material progress ball mill crushing is crushed
Material；Broken material is subjected to burdening calculation, the Binder Phase of hard alloy in broken material is made to account for the percentage 25~35% of total weight,
Then reworked material is obtained with after drying by wet-milling；
(2) preparation of hard alloy long cylinder idiosome: using the reworked material in step (1) as raw material, pass through isostatic pressing process
Formulate the hard alloy long cylinder idiosome of setting length；
(3) end face processes: the end face of the hard alloy long cylinder idiosome in more steps (2) being processed, hard alloy is made
The end face of long cylinder can carry out seamless at recess L-type or the L-type of protrusion between the L-type end face of recess and the L-type end face of protrusion
Gap occlusion；Then L-type end face is further finished, makes its finish Ra≤0.04mm；Then to the L of long cylinder blank
Type end side carries out cleaning treatment, it is desirable that without soot particle and sundries, one layer of acetone then will be coated on end face；
(4) it assembles: by L-type end face processed in step (3), according to length needed for hard alloy cylindrical body, by more hard
Alloy cylindrical body is spliced in such a way that L-type end face bumps are agreed with, and is placed on dedicated all wares in the horizontal direction；
(5) it is sintered: the hard alloy idiosome assembled in step (4) is placed in vacuum pressure furnace, carry out at vacuum metallurgy heat
More hard alloy long cylinder idiosomes are integrated into a root long cylinder idiosome after cooling by reason；By the long cylinder idiosome after integration into
Row finishing, makes its finish Ra≤0.04mm to get the hard alloy long cylinder of required specification.
2. a kind of preparation method of hard alloy long cylinder according to claim 1, which is characterized in that in the step (1),
The diameter of broken material answers≤2mm, diameter≤0.4mm of reworked material.
3. a kind of preparation method of hard alloy long cylinder according to claim 1, which is characterized in that in the step (2),
Length is set as 700~900mm.
4. a kind of preparation method of hard alloy long cylinder according to claim 1 or claim 2, which is characterized in that the step (2)
In, the technological parameter of isostatic pressing are as follows: 170~180MPa of pressure, 0.5~1.5h of pressing time.
5. a kind of preparation method of hard alloy long cylinder according to claim 1, which is characterized in that in the step (4),
More are 2~3.
6. a kind of preparation method of hard alloy long cylinder according to claim 1, which is characterized in that in the step (5),
Vacuum metallurgy heat treatment temperature is 1365~1375 DEG C, and the processing time is 1~2h, vacuum degree≤0.8Pa；The hard of required specification
The length of alloy long cylinder is 1400~1600mm.
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