CN105755310B - A kind of method for improving tin bronze hot-workability - Google Patents
A kind of method for improving tin bronze hot-workability Download PDFInfo
- Publication number
- CN105755310B CN105755310B CN201610224792.XA CN201610224792A CN105755310B CN 105755310 B CN105755310 B CN 105755310B CN 201610224792 A CN201610224792 A CN 201610224792A CN 105755310 B CN105755310 B CN 105755310B
- Authority
- CN
- China
- Prior art keywords
- tin bronze
- hot
- heat treatment
- workability
- tin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Abstract
The invention discloses a kind of method for improving tin bronze hot-workability, first, raw material are weighed by the mass percent of each chemical element of tin bronze alloys, ingot is cooled down after fusing；Extrusion process is carried out after ingot is heated into 750~800 DEG C, room temperature is cooled to, bar is obtained after cold-drawn, machining；The pre-heat treatment is finally carried out to bar, then carries out stamping process, the pre-heat treatment temperature is 750~820 DEG C, the time is 5~10min.The invention provides a kind of method for improving tin bronze hot-workability, by carrying out the pre-heat treatment before stamping process, control the temperature and soaking time of the pre-heat treatment, and process route reasonable in design, realize and tin bronze alloys is manufactured using Sheet Metal Forming Technology, the method is effectively reduced the segregation of ternary eutectoid structure in tin bronze alloys, refining alloy crystal grain, the defect produced in punching course is reduced, the mechanical property of the tin bronze alloys after punch forming is effectively improved.
Description
Technical field
The present invention relates to the manufacture field of nonferrous materials, especially a kind of method for improving tin bronze hot-workability.
Background technology
Tin bronze has excellent elasticity, and anti-corrosion, wear-resisting, preferable mechanical property is widely used in making flexible member
And wear part.A small amount of phosphorus is added in tin bronze has extraordinary deoxidation effect, improves the casting character of tin bronze, from
And improve intensity, hardness, elastic modelling quantity, fatigue strength and the anti-wear performance of alloy.On the other hand, the addition of phosphorus can reduce tin green grass or young crops
The alpha phase zone of copper and there is Cu3P phases, occur α+δ+Cu when tin, phosphorus content reach certain value in alloy, in alloy3P ternarys are total to
Crystalline substance tissue, its fusing point is 628 DEG C.This eutectic structure tin bronze alloys carry out it is hot worked during easily in grain boundaries segregation
So as to trigger the hot-short of alloy, and this red brittleness to increase with the increase of tin phosphorus content in alloy.This ternary eutectic group
The presence knitted also significantly limit the hot-workability of tin bronze alloys.
In the prior art, the molding mode of tin bronze alloys is mainly casting or extrusion forming, such as Publication No.
A kind of cast wear-resistant tin bronze alloy and preparation method thereof is disclosed in the Chinese patent literature of CN102304642A, the casting is resistance to
Mill tin bronze alloys is made up of the component of following weight percentage：Sn 10-14%, Pb 2-5%, Ni 1-4%, impurity into
Divide total content≤0.25% of Fe, Sb, Al, Zn, P, Si and Bi, balance of Cu.The preparation side of the cast wear-resistant tin bronze alloy
Method is：By raw material successively melting, to refining agent is added in fused solution, pour into a mould, cooling, obtain cast wear-resistant tin bronze alloy casting
Ingot, then obtain cast wear-resistant tin bronze alloy through homogenizing annealing treatment.
And for example the Chinese patent literature of Publication No. CN102321826A discloses a kind of extrusion forming high-tin bronze alloy
And preparation method thereof, the extrusion forming high-tin bronze alloy is made up of the component of following weight percentage：Sn 8-12%, Pb
1-4%, Ni 2-5%, total content≤0.28% of impurity component Fe, Sb, Al, Zn, P, Si and Bi, balance of Cu.This is squeezed into
Type high-tin bronze alloy is prepared using Under Pressure Solidification crystalline forming technique.But casting and extrusion forming exist precision,
The relatively low problem of yield rate and production efficiency.
The production efficiency of punch process is high, and easy to operate, and precision and surface state are better than casting, forging, and cutting adds
Work amount is few.But because tin bronze has intensity and mechanical property high, while hot-working character is poor, during punch forming
Shaping or easily cracking are difficult to, cause it to be difficult to be processed by the way of punching press.
The content of the invention
The invention provides a kind of method for improving tin bronze hot-workability, carried out at preheating by before stamping process
Reason, controls the temperature and soaking time of the pre-heat treatment, and process route reasonable in design, realizes and manufactures tin using Sheet Metal Forming Technology
Bell metal, the method is effectively reduced the segregation of ternary eutectoid structure in tin bronze alloys, and refining alloy crystal grain reduces punching press
During produce defect, the mechanical property of the tin bronze alloys after punch forming is effectively improved.
The invention discloses a kind of method for improving tin bronze hot-workability, step is as follows：
(1) raw material are weighed by the mass percent of each chemical element of tin bronze alloys, ingot is cooled down after fusing；
The mass percent of the chemical element that the tin bronze alloys contains is：Sn 6.5~9.0, P0.01~0.5, Zn
≤ 0.20, Ni≤0.20, Fe≤0.01, Pb≤0.05, balance of Cu；
(2) extrusion process is carried out after the ingot of step (1) being heated into 750~800 DEG C, room temperature is cooled to, through cold-drawn, is cut
Bar is obtained after cutting treatment；
(3) bar to step (2) carries out the pre-heat treatment, then carries out stamping process, the pre-heat treatment temperature be 750~
820 DEG C, the time is 5~10min.
Found through experiment, the mass percent of the Sn in raw material and P is controlled in Sn 6.5~9.0, P0.01~0.5 model
When enclosing, just tin bronze alloys can be manufactured by punch forming, it is easy to crack after punch forming beyond the scope.
Preferably, in step (1), in the tin bronze alloys, the mass percent of Sn, P is：Sn 7.0~8.0, P
0.1~0.2.Further preferably, in the tin bronze alloys, the mass ratio of Sn and P is 40~80:1.Sent out through further experiment
Existing, in the tin bronze alloys, the mass percent of Sn, P is：Sn 8.0, during P 0.1, the final tin bronze alloys for obtaining
Performance is optimal.
Preferably, in step (2), during the extrusion process, extruding ratio is 6.25.
Preferably, in step (3), punch forming, pressing direction and tin bronze bar are carried out using the forcing press of 300T
It is axially consistent, the punching press time is 1~2s.Further preferably, in step (3), the temperature of the pre-heat treatment is 767 DEG C, when
Between be 5min.By after the Technology for Heating Processing of the specified conditions, tin bronze alloys organizes recrystallization good after punching press, and crystal grain is thin
Change substantially, the segregation of ternary eutectic tissue has obtained good control, and alloy has preferable comprehensive mechanical property.
Preferably, in step (2), certain size is obtained after cold-drawn, machining, to meet Sheet Metal Forming Technology to material
The size requirement of material.
Alloy carry out it is hot worked during, should be by improving the pre-heat treatment temperature to ensure with less processing
Resistance, prevents the segregation of the ternary eutectic tissue caused because preheating temperature is too high or soaking time is long, assembles again
And fusing, so as to cause the hot-short of alloy.The present invention is pre-processed to as cast condition tin bronze tissue, effective by extrusion process
The dendrite tissue eliminated in As-cast Microstructure, recrystallize alloy structure, the segregation of phosphor tin is reduced, after being
Drop stamping technique is prepared.The present invention is optimized to the pre-heat treatment technique before tin bronze punching press, finds in tin bronze
Heating-up temperature is 750~820 DEG C, and alloy has preferable processing characteristics when soaking time is 5~10min.In this temperature range
During with soaking time, on the one hand tin bronze alloys has obtained sufficient heating, and machining deformation is uniform；When on the other hand, to insulation
Between control inhibit the segregation and fusing of ternary eutectic tissue well again.Tied again by hot-working alloy structure after pretreatment
Brilliant good, the tissue defects in hot procedure have obtained effective control, comprehensively improve the hot-workability of tin bronze alloys
Energy.
Compared with prior art, the invention has the advantages that：
The present invention is pre-processed by tin bronze alloys, by suitable extrusion process, has effectively eliminated alloy
Dendritic crystal in as-cast structure.So that alloy is preferably recrystallized during extruding, the crystal grain of alloy is refined, reduced
The segregation of ternary eutectic tissue, is conducive to being processed further for tin bronze alloys in alloy.Processing is preheated by alloy
The control of heating-up temperature and soaking time makes alloy both obtain sufficient heating, has small processing in pre- hot procedure
Resistance, can be very good to deform upon, and inhibit the segregation and fusing of ternary eutectic tissue well.By after pre- hot-working
Alloy structure recrystallization is good, and the defect produced in hot procedure has obtained effective control.Comprehensively improve tin bronze conjunction
The hot-working character of gold.
The pretreating process of a kind of tin bronze punching press that the present invention is provided so that tin bronze is adapted to punch process, is used for
Produce some less better simply parts of shape.This technique can partly instead of the casting of conventional tin bronze be improved
Production efficiency, has saved industrial cost, has good application prospect in future.
Brief description of the drawings
Fig. 1 is the metallograph in embodiment 1 through the tin bronze alloys phase constitution after extruding；
Fig. 2 be embodiment 1 in it is stamped after tin bronze alloys phase constitution metallograph；
Fig. 3 be embodiment 2 in it is stamped after tin bronze alloys phase constitution metallograph；
Fig. 4 be embodiment 3 in it is stamped after tin bronze alloys phase constitution metallograph；
Fig. 5 be comparative example 1 in it is stamped after tin bronze alloys phase constitution metallograph；
Fig. 6 be comparative example 2 in it is stamped after tin bronze alloys phase constitution metallograph.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment 1
(1) by following mass percents and consider that scaling loss weighs raw material, will raw material put into melt in stove after cool down again
Ingot；
Sn 8.0, P 0.1, Zn≤0.20, Ni≤0.20, Fe≤0.01, Pb≤0.05, balance of Cu.
(2) ingot that step (1) is obtained is heated to 750~800 DEG C, takes out sample and extruded at once, extruding ratio is
6.25, place into cooling in air.
(3) extruding gained bar is carried out into cold-drawn, obtains the tin bronze bar of a diameter of 80mm, then machine cutting
Into a diameter of 34mm, length is the bar of 50mm.
(4) the tin bronze bar that step (3) is obtained is heated to 820 DEG C and 5min is incubated using natural gas spraying gun, then
Being put into Mecol Press 300T forcing presses carries out punching press, and pressing direction is axially consistent with bar, and the punching press time is 1~2s.
The present embodiment is through the metallograph of the alloy phase structure after step (2) extruding as shown in figure 1, being closed after extruding pretreatment
The dendritic structure of payment organization disappears, and occurs recrystallization in alloy, there is a large amount of glide bands in crystal grain.
Metallograph through the tin bronze alloys tissue after step (4) punching press is as shown in Figure 2, it can be seen that, now alloy group
Crystal grain is knitted substantially to refine, and recrystallization is all right, crystallite dimension uniformity is good.
Embodiment 2
Preparation technology is substantially the same manner as Example 1, differs only in step (4), and hot worked temperature is 750 DEG C, when
Between be 5min.The metallograph of the tin bronze alloys tissue after the present embodiment is stamped, as shown in figure 3, similar to Fig. 2.
Embodiment 3
Preparation technology is substantially the same manner as Example 1, differs only in step (4), and hot worked temperature is 767 DEG C, when
Between be 5min.Fig. 4 be the present embodiment it is stamped after tin bronze alloys tissue metallograph, it is known that, alloy structure crystal grain is obvious
Refinement.
Comparative example 1
Preparation technology is substantially the same manner as Example 1, differs only in step (4), and hot worked temperature is 850 DEG C, when
Between be 5min.Fig. 5 be this comparative example it is stamped after tin bronze alloys tissue metallograph, it is known that, sample after punching press at 850 DEG C
Macroscopic cracking band is produced, direction of check is perpendicular to the direction of extrusion.
Comparative example 2
Compared with the preparation technology of embodiment 1, extrusion process process is eliminated.
The metallograph of the tin bronze alloys tissue after this comparative example is stamped is as shown in fig. 6, without extrusion process, Jiang Xiqing
Alloy structure there is also recrystallization process, but alloy structure crystal grain compared with embodiment during the direct punch forming of copper as-cast structure
In roughening, and crystallite dimension uniformity is poor, easily causes and occurs the defects such as crackle in punching course, so as to deteriorate punching press
The overall performance of alloy after shaping.
Claims (6)
1. it is a kind of improve tin bronze hot-workability method, it is characterised in that step is as follows：
(1) raw material are weighed by the mass percent of each chemical element of tin bronze alloys, ingot is cooled down after fusing；
The mass percent of the chemical element that the tin bronze alloys contains is：Sn 6.5~9.0, P 0.01~0.5, Zn≤
0.20, Ni≤0.20, Fe≤0.01, Pb≤0.05, balance of Cu；
(2) extrusion process is carried out after the ingot of step (1) being heated into 750~800 DEG C, room temperature is cooled to, at cold-drawn, cutting
Bar is obtained after reason；
(3) bar to step (2) carries out the pre-heat treatment, then carries out stamping process, and the pre-heat treatment temperature is 750~820
DEG C, the time is 5~10min.
2. it is according to claim 1 improve tin bronze hot-workability method, it is characterised in that in step (1), the tin
In bell metal, the mass percent of Sn, P is：Sn 7.0~8.0, P 0.1~0.2.
3. it is according to claim 2 improve tin bronze hot-workability method, it is characterised in that in step (1), the tin
In bell metal, the mass ratio of Sn and P is 40~80:1.
4. it is according to claim 1 improve tin bronze hot-workability method, it is characterised in that in step (2), it is described squeeze
In pressure processing procedure, extrusion ratio is 6.25.
5. it is according to claim 4 improve tin bronze hot-workability method, it is characterised in that in step (3), punching press side
To axial consistent with bar, the punching press time is 1~2s.
6. it is according to claim 5 improve tin bronze hot-workability method, it is characterised in that the temperature of the pre-heat treatment
It is 767 DEG C to spend, and the time is 5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224792.XA CN105755310B (en) | 2016-04-11 | 2016-04-11 | A kind of method for improving tin bronze hot-workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610224792.XA CN105755310B (en) | 2016-04-11 | 2016-04-11 | A kind of method for improving tin bronze hot-workability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105755310A CN105755310A (en) | 2016-07-13 |
| CN105755310B true CN105755310B (en) | 2017-05-31 |
Family
ID=56334792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610224792.XA Active CN105755310B (en) | 2016-04-11 | 2016-04-11 | A kind of method for improving tin bronze hot-workability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105755310B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111575511A (en) * | 2020-05-26 | 2020-08-25 | 昆明理工大学 | Method for improving micro-macro segregation of copper-tin alloy |
| CN115896533B (en) * | 2022-11-01 | 2024-04-05 | 安徽鑫科铜业有限公司 | Rolled copper foil and manufacturing method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4586967A (en) * | 1984-04-02 | 1986-05-06 | Olin Corporation | Copper-tin alloys having improved wear properties |
| EP2045344B1 (en) * | 2006-07-21 | 2012-05-23 | Kabushiki Kaisha Kobe Seiko Sho | Process for producing copper alloy sheets for electrical/electronic part |
| CN101665884A (en) * | 2008-09-01 | 2010-03-10 | 中国核动力研究设计院 | Tin bronze for manufacturing pepeline fittings and production process of pepeline fittings thereof |
| CN102330042B (en) * | 2011-09-21 | 2013-01-16 | 镇江忆诺唯记忆合金有限公司 | Method for improving psychro and thermal fatigue performances of ZCuSn10P alloy |
-
2016
- 2016-04-11 CN CN201610224792.XA patent/CN105755310B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105755310A (en) | 2016-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106563919B (en) | A kind of preparation method of mobile phone center, rear cover | |
| CN101709427A (en) | Low-cost, high-strength, high-toughness and high-abrasion resistance cold-working die steel and preparation method thereof | |
| CN103334061A (en) | Die-casting die steel with high heat conductivity and large section and preparation and heat treatment method thereof | |
| CN106282654B (en) | A kind of high resiliency low cost Sn-P-Cu alloy band and preparation method thereof | |
| CN107746917B (en) | Mould steel and preparation method thereof and application, mold | |
| CN111118422B (en) | Preparation method of high-tungsten high-cobalt nickel alloy fine-grain plate | |
| CN101709428A (en) | Compound microalloy hot die steel with high heat resistance and preparation method thereof | |
| CN104561815A (en) | High-homogeneous large-size ultrahigh-strength steel bar and production method thereof | |
| CN105463277B (en) | A kind of rods and bars of aluminium alloy and its production method | |
| CN106890865A (en) | Major diameter AQ80M magnesium alloy cakes material squeezes the integrated forming technology of forging | |
| CN111519057B (en) | Method for prolonging service life of die for preparing aluminum alloy | |
| CN105755310B (en) | A kind of method for improving tin bronze hot-workability | |
| CN105256228A (en) | High-malleability high-density pre-hardened plastic die steel and manufacturing method thereof | |
| CN102989952A (en) | Processing method of wire support clamp | |
| CN102989944A (en) | Forging method of expansion breaking connecting rod | |
| CN114645154B (en) | Preparation method of high-hardness copper alloy | |
| JP6575756B2 (en) | Method for producing precipitation strengthened stainless steel | |
| CN103789570A (en) | High-strength heat-resisting micro-alloyed copper pipe and preparation method thereof | |
| CN102989982B (en) | Forging method of driving shaft for gearbox | |
| CN102191405B (en) | Copper alloy applied to clamping and loading tools of strip steel welding equipment and its production method | |
| CN111647807A (en) | High-alloy die steel and preparation process thereof | |
| CN104831110B (en) | Cu-Cr-Ag alloy crystallizer copper plate and preparation process thereof | |
| CN105950991A (en) | Copper-bearing high-polishing die steel and preparing technology thereof | |
| JP2004183102A (en) | Steel for machine structure, hot forming method for component consisting of the steel, and component obtained thereby | |
| JPH04221031A (en) | High strength and high thermal conductivity copper alloy for die for plastic molding and its manufacture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |