CN109365824A - A kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing - Google Patents
A kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing Download PDFInfo
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- CN109365824A CN109365824A CN201811246776.6A CN201811246776A CN109365824A CN 109365824 A CN109365824 A CN 109365824A CN 201811246776 A CN201811246776 A CN 201811246776A CN 109365824 A CN109365824 A CN 109365824A
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- electrical steel
- ffour piece
- silicon electrical
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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
- B22F5/10—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product of articles with cavities or holes, not otherwise provided for in the preceding subgroups
- B22F5/106—Tube or ring forms
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/03—Press-moulding apparatus therefor
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/02—Compacting only
- B22F3/04—Compacting only by applying fluid pressure, e.g. by cold isostatic pressing [CIP]
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/1003—Use of special medium during sintering, e.g. sintering aid
- B22F3/1007—Atmosphere
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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
- 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
Abstract
A kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing includes the following steps: the composition proportion of (1) design alloy material；(2) fFour piece type rigidity jacket forming mould and its outer gum cover are fixed；(3) it then charges forming according to composition proportion, guarantees the uniform thickness of metal pipe billet after powder is suppressed in mold；The distance between interior gum cover and rigid housing are designed according to actual condition；(4) compression moulding in cold isostatic press；(5) metal pipe billet is demoulded, but retains steel bushing outside fFour piece type；(6) metal pipe billet with steel bushing outside fFour piece type for obtaining step (5) is put into vacuum drying oven together is sintered, and removes fFour piece type steel bushing after cooling, obtains the flat and smooth 6.5wt% high-silicon electrical steel thin-wall hollow pipe of tube wall；The present invention by adjusting between double two molds of steel bushing of fFour piece type space and size, the different 6.5wt% high-silicon electrical steel hollow tube of the symmetrical degree of different size can be prepared.
Description
Technical field
The invention belongs to PM techniques and magnetically soft alloy tubing processing technology of preparing field, in particular to a kind of
The preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing.
Background technique
High-silicon electrical steel is to be used to prepare transformer in Electronic Industry, pass as a kind of magnetically soft alloy that magnetic property is excellent
The important alloy material of the equipment such as sensor, generator and motor, silicon content is generally higher than in the matrix of the material
3.5wt% (quality divides twt%, similarly hereinafter).In above-mentioned a series of magnetically soft alloy, silicon content is the high silicon of 6.5wt%
Electrical sheet thin slice magnetic performance is the most significant, its magnetostriction coefficient is about zero under high frequency magnetic field, magnetic conductivity is high, iron loss is low
Deng, thus become and prepare material using the ideal of the devices such as generator and transformer in high frequency.6.5wt% high silicon electricity at present
Work steel is more produced and processed and is applied in a manner of plate, in order to widen 6.5wt% high-silicon electrical steel alloy in high frequency magnetic
Application under the certain special operation conditions in field, should develop a variety of profiles of the alloy material.Since brittleness is aobvious at room temperature for the alloy
Work is difficult to deformation processing, cannot develop a kind of process by sheet fabrication at tubing using conventional isometrical scroll forming technique
The preparation processing method of 6.5wt% high-silicon electrical steel thin-wall hollow pipe short, high-efficient, at low cost has become the project in profile
One of the hot spot of preparation processing aspect.
Recently as the development of advancing by leaps and bounds of electronics Electronic Industry, the frequency that uses of electrical component of electrical sheet preparation
1000Hz or more is had increased to by 50Hz, the excellent physical property of 6.5wt% high-silicon electrical steel alloy shows brighter
It is aobvious；In addition, environment and resource problem more show prominent serious, and society is for high silicon electrician with the rapid development of science and technology
The demand of steel alloy becomes much larger, and also requires the technology of high quality high-silicon electrical steel to be produced higher and higher.It sends out in recent years
The common preparation of exhibition or the method for production high-silicon electrical steel have spray-up method, vapour deposition process, molten-salt growth method, quickly solidification
Method is gradually plasticized rolling etc., but the above method is opposite is conducive to produce plate, and is difficult to prepare the profile of the alloy such as
Hollow tube.And injection shapes gentle phase deposition technique to produce high-silicon electrical steel, can generate a large amount of powder in production process
It is serious to break ring to environment for dirt particle；Molten-salt growth method production high-silicon electrical steel does not destroy environment directly, but due to technique spy
Different preparation method is unfavorable for the subsequent smooth processing of product so that production efficiency is too low and the surface quality of product is poor；Fastly
Although method, the product higher to environmental disruption very little, production efficiency also relatively other techniques that prepare high-silicon electrical steel is consolidated in rapid hardening
It is subsequent to be protected by relative complex heat treatment process there are the dimensions of more internal flaw and product is very limited
Demonstrate,prove the magnetic property of product；Gradually plasticising rolling production high-silicon electrical steel can be realized on the traditional milling train in China, but the party
Method wants multipass heat treatment process appropriate to hold to reduce the degree of order of product with this to improve the alloy in process of production
The ability of continuous deformation processing, so that the continuity of production decreases, and then affects the efficiency of production.
Summary of the invention
In order to solve the above technical problems, the purpose of the present invention is widen 6.5wt% high-silicon electrical steel alloy in high frequency magnetic field
Application under certain special operation conditions provides a kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing, is conducive to sintering
Steel bushing after the completion is detached from, and flat and smooth hollow pipe can be obtained after demoulding.
In order to achieve the above object, the technical solution of the present invention is as follows:
A kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing, which comprises the following steps:
(1) composition proportion of alloy material is designed, mild steel mass percent is 85-90%, industrial silico briquette quality percentage
Number is 10-15%；
(2) fFour piece type rigidity jacket forming mould and its outer gum cover are fixed, installed and fixed core rigidity inner sleeve and
Gum cover；Material used in the fFour piece type rigidity jacket forming mould is martensitic stain less steel, each flap-type die size is equal
Identical, i.e., central angle corresponding to each valve circular arc is right angle；The outer inner wall of fFour piece type mold is seamless applying；Its rigid housing
Both ends are required to rubber stopper, and need smooth on the outside of rubber stopper, be bondeds with supporting plane guarantee that fFour piece type is rigid during the preparation process
The stability of jacket forming mould；
(3) according to composition proportion, the metal powder of step (1) is weighed, then charging forming, ensures powder in charging process
End guarantees in mold the uniform thickness of metal pipe billet after powder compacting by ram-jolt；Interior gum cover and rigidity are designed according to actual condition
The distance between housing；
(4) metal tube semi-finished product obtained in step (3) are put into compression moulding in cold isostatic press, pressing pressure is
80-200MPa；
(5) step (4) finally obtained metal pipe billet is demoulded, but retains steel bushing outside fFour piece type；
(6) metal pipe billet with steel bushing outside fFour piece type for obtaining step (5) is put into vacuum drying oven together burns
Knot, sintering atmosphere are vacuum or to be sintered in atmosphere protection stove, and sintering atmosphere is inert gas, heating rate is 3-10 DEG C/
Min, sintering temperature are 1000-1250 DEG C, keep the temperature 2-5 hours, remove fFour piece type steel bushing after cooling, obtain the smooth light of tube wall
Sliding 6.5wt% high-silicon electrical steel thin-wall hollow pipe.
When the asymmetric outer wall hollow pipe of preparation 6.5wt% high-silicon electrical steel, which is characterized in that
Guarantee in fFour piece type mold that gum cover diameter is identical and the concyclic heart；It needs to adjust outer shell according to the design of asymmetric outer wall
Set is at a distance from interior gum cover, the compression moulding in cold isostatic press, pressing pressure 120-200MPa；Heating rate is 6-10
DEG C/min, sintering temperature is 1200~1450 DEG C.
When the asymmetric inner wall hollow pipe of preparation 6.5wt% high-silicon electrical steel, which is characterized in that
Guarantee that fFour piece type mold outer cylinder sheath diameter is identical and the concyclic heart；It needs to adjust outer shell according to the design of asymmetric inner wall
Set is at a distance from interior gum cover, the compression moulding in cold isostatic press, pressing pressure 120-200MPa；Heating rate is 6-10
DEG C/min, sintering temperature is 1200~1450 DEG C.
The invention has the advantages that
1, raw material of the present invention is only with mild steel, industrial silico briquette, and component is simple, tune low in cost, but passing through technique
Whole, performance, which remains unchanged, can reach the performance characteristics of 6.5wt% high-silicon electrical steel.
2, in 6.5wt% high-silicon electrical steel hollow pipe preparation process according to the present invention, crucial technology of preparing is to introduce
Double steel bushings, the double gum cover moulds of special designing.FFour piece type rigidity housing inner surface in mold is specially treated, is coated with uniformly
Alumina ceramic layer, it is ensured that will not be bonded when fFour piece type steel bushing is sintered together with hollow pipe green compact, after the completion of being conducive to sintering
Steel bushing be detached from, flat and smooth hollow pipe can be obtained after demoulding.
3, the space between two mold of the double steel bushings of adjustment fFour piece type and size, the symmetrical degree that can prepare different size are different
6.5wt% high-silicon electrical steel hollow tube.
Detailed description of the invention
Fig. 1 is the axial section structural schematic diagram of 6.5wt% high-silicon electrical steel hollow pipe and its molding die.
Fig. 2 is the radial section structural schematic diagram of 6.5wt% high-silicon electrical steel hollow pipe and its molding die.
Specific embodiment
Below by the drawings and specific embodiments, the present invention is described in detail.
Embodiment one
The present embodiment the following steps are included:
(1) composition proportion of alloy material is designed, mild steel mass percent is 85%, and industrial silico briquette mass percent is
15%；
(2) fFour piece type rigidity jacket forming mould and its outer gum cover 1 are fixed, core rigidity inner sleeve 5 has been installed and fixed
And gum cover 4；Material used in the fFour piece type rigidity jacket forming mould is martensitic stain less steel, each flap-type die size
All the same, i.e., central angle corresponding to each valve circular arc is right angle；For preferably molding and guarantee the high silicon electricity after processing
The smooth and finish of work steel hollow tube inside and outside wall, the outer inner wall of fFour piece type mold are seamless applying；The rigidity housing both ends are equal
Need rubber stopper 6, and needed on the outside of rubber stopper 6 it is smooth, be bonded during the preparation process with supporting plane guarantee fFour piece type rigidity housing
The stability of molding die.
(3) according to composition proportion, the metal powder of step (1) is weighed, then charging forming, ensures powder in charging process
End guarantees in mold the uniform thickness of metal pipe billet after powder compacting by ram-jolt；Interior gum cover and rigidity are designed according to actual condition
The distance between housing；See the sky of Fig. 1, Fig. 2 between the external steel bushing 2 of flap-type rigidity jacket forming mould and internal gum cover 4
Two kinds of powder 3 of intracavitary loading mild steel and industrial silico briquette；
(4) metal tube semi-finished product obtained in step (3) are put into compression moulding in cold isostatic press, pressing pressure is
80-200MPa；
(5) step (4) finally obtained metal pipe billet is demoulded, but retains steel bushing outside fFour piece type；
(6) metal pipe billet with steel bushing outside fFour piece type for obtaining step (5) is put into vacuum drying oven together burns
Knot, sintering atmosphere are vacuum or to be sintered in atmosphere protection stove, and sintering atmosphere is inert gas, heating rate is 3-10 DEG C/
Min, sintering temperature are 1000 DEG C, keep the temperature 6 hours, remove fFour piece type steel bushing after cooling, it is flat and smooth to obtain tube wall
6.5wt% high-silicon electrical steel thin-wall hollow pipe.
Embodiment two
The asymmetric outer wall 6.5wt% high-silicon electrical steel hollow pipe of outer light type, the present embodiment method are essentially identical in order to obtain
It is in embodiment one, but with the difference of embodiment one,
(1) mild steel mass percent is 90%, and industrial silico briquette mass percent is 10%；
(2) guarantee in fFour piece type mold that gum cover diameter is identical and the concyclic heart；It needs to adjust according to the design of asymmetric outer wall
Outer cylinder sheath is at a distance from interior gum cover, the compression moulding in cold isostatic press, then takes out demoulding；To having in atmosphere protection stove
The asymmetric outer wall metal hollow pipe green compact of the outer light type of fFour piece type steel bushing are sintered, and sintering temperature is 1250 DEG C, sintering atmosphere
For argon gas, when sintering, carries out low speed heating in specific range of temperatures to prevent sample from cracking；It is asymmetric to finally obtain outer light type
Outer wall 6.5wt% high-silicon electrical steel hollow pipe.
Embodiment three
The asymmetric inner wall 6.5wt% high-silicon electrical steel hollow pipe of outer light type, the present embodiment method are essentially identical in order to obtain
It is in embodiment one, but with the difference of embodiment one,
(1), mild steel mass percent is 87%, and industrial silico briquette mass percent is 13%；
(2) guarantee that fFour piece type mold outer cylinder sheath diameter is identical and the concyclic heart；It needs to adjust according to the design of asymmetric inner wall
Outer cylinder sheath is at a distance from interior gum cover, the compression moulding in cold isostatic press, then takes out demoulding；To having in atmosphere protection stove
The asymmetric inner wall metal hollow pipe green compact of the outer light type of fFour piece type steel bushing are sintered, and sintering temperature is 1250 DEG C, sintering atmosphere
For argon gas, when sintering, carries out low speed heating in specific range of temperatures to prevent sample from cracking；It is asymmetric to finally obtain outer light type
Inner wall 6.5wt% high-silicon electrical steel hollow pipe.
Claims (3)
1. a kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing, which comprises the following steps:
(1) according to the composition proportion of design alloy material, mild steel mass percent is 85-90%, industrial silico briquette quality percentage
Number is 10-15%；
(2) fFour piece type rigidity jacket forming mould and its outer gum cover are fixed, core rigidity inner sleeve and gum cover have been installed and fixed；
Material used in the fFour piece type rigidity jacket forming mould is martensitic stain less steel, each flap-type die size is all the same,
Central angle corresponding to i.e. each valve circular arc is right angle；The outer inner wall of fFour piece type mold is seamless applying；Its rigid housing both ends
It is required to rubber stopper, and needs smooth on the outside of rubber stopper, be bonded guarantee fFour piece type rigidity housing with supporting plane during the preparation process
The stability of molding die；
(3) according to composition proportion, the metal powder of step (1) is weighed, then charging forming, ensures powder quilt in charging process
Ram-jolt, guarantee mold in powder compacting after the uniform thickness of metal pipe billet；Interior gum cover and rigid housing are designed according to actual condition
The distance between；
(4) metal tube semi-finished product obtained in step (3) are put into compression moulding in cold isostatic press, pressing pressure 80-
200MPa；
(5) step (4) finally obtained metal pipe billet is demoulded, but retains steel bushing outside fFour piece type；
(6) metal pipe billet with steel bushing outside fFour piece type for obtaining step (5) is put into vacuum drying oven together is sintered, and burns
Knot atmosphere is vacuum or is sintered in atmosphere protection stove that sintering atmosphere is inert gas, and heating rate is 3-10 DEG C/min, sintering
Temperature is 1000-1250 DEG C, keeps the temperature 2-5 hours, removes fFour piece type steel bushing after cooling, it is flat and smooth to obtain tube wall
6.5wt% high-silicon electrical steel thin-wall hollow pipe.
2. a kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing according to claim 1, feature exist
In when the asymmetric outer wall hollow pipe of preparation 6.5wt% high-silicon electrical steel, gum cover diameter is identical and total in guarantee fFour piece type mold
The center of circle；Need to adjust outer cylinder sheath at a distance from interior gum cover according to the design of asymmetric outer wall, the compression moulding in cold isostatic press,
Pressing pressure is 120-200MPa；Heating rate is 6-10 DEG C/min, and sintering temperature is 1200~1450 DEG C.
3. a kind of preparation method of 6.5wt% high-silicon electrical steel thin-walled hollow tubing according to claim 1, feature exist
In when the asymmetric inner wall hollow pipe of preparation 6.5wt% high-silicon electrical steel, guarantee fFour piece type mold outer cylinder sheath diameter is identical and total
The center of circle；Need to adjust outer cylinder sheath at a distance from interior gum cover according to the design of asymmetric inner wall, the compression moulding in cold isostatic press,
Pressing pressure is 120-200MPa；Heating rate is 6-10 DEG C/min, and sintering temperature is 1200~1450 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246776.6A CN109365824B (en) | 2018-10-25 | 2018-10-25 | Preparation method of 6.5 wt% high-silicon electrical steel thin-wall hollow pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811246776.6A CN109365824B (en) | 2018-10-25 | 2018-10-25 | Preparation method of 6.5 wt% high-silicon electrical steel thin-wall hollow pipe |
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| Publication Number | Publication Date |
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| CN109365824A true CN109365824A (en) | 2019-02-22 |
| CN109365824B CN109365824B (en) | 2021-06-25 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60145303A (en) * | 1983-10-21 | 1985-07-31 | アベスタ・ニビ・パウダ−・エ−ビ− | Manufacture of powder metallurgical product |
| JPH0277536A (en) * | 1988-06-08 | 1990-03-16 | Sanyo Special Steel Co Ltd | Production of high-carbon cobalt-base alloy member |
| CN102009178A (en) * | 2010-11-26 | 2011-04-13 | 王东伟 | Method for producing large-size metal powder filter tube |
| CN102485379A (en) * | 2010-12-03 | 2012-06-06 | 北京有色金属研究总院 | Forming method of special-shaped filter tube |
| CN102962464A (en) * | 2012-11-20 | 2013-03-13 | 江苏云才材料有限公司 | Asymmetrical stainless steel filter membrane tube and production method thereof |
| CN106363180A (en) * | 2016-08-29 | 2017-02-01 | 江苏云才材料有限公司 | Preparation method of exterior-smoothness type metal filtering membrane tube used in nuclear industry |
| CN107900103A (en) * | 2017-11-07 | 2018-04-13 | 西安石油大学 | A kind of short route composite preparation process of the high silicon plate of gradient |
-
2018
- 2018-10-25 CN CN201811246776.6A patent/CN109365824B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60145303A (en) * | 1983-10-21 | 1985-07-31 | アベスタ・ニビ・パウダ−・エ−ビ− | Manufacture of powder metallurgical product |
| JPH0277536A (en) * | 1988-06-08 | 1990-03-16 | Sanyo Special Steel Co Ltd | Production of high-carbon cobalt-base alloy member |
| CN102009178A (en) * | 2010-11-26 | 2011-04-13 | 王东伟 | Method for producing large-size metal powder filter tube |
| CN102485379A (en) * | 2010-12-03 | 2012-06-06 | 北京有色金属研究总院 | Forming method of special-shaped filter tube |
| CN102962464A (en) * | 2012-11-20 | 2013-03-13 | 江苏云才材料有限公司 | Asymmetrical stainless steel filter membrane tube and production method thereof |
| CN106363180A (en) * | 2016-08-29 | 2017-02-01 | 江苏云才材料有限公司 | Preparation method of exterior-smoothness type metal filtering membrane tube used in nuclear industry |
| CN107900103A (en) * | 2017-11-07 | 2018-04-13 | 西安石油大学 | A kind of short route composite preparation process of the high silicon plate of gradient |
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| CN109365824B (en) | 2021-06-25 |
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