CN109487116A

CN109487116A - High-strength CTB alloy band and preparation method suitable for electrically conductive elastic component

Info

Publication number: CN109487116A
Application number: CN201811428341.3A
Authority: CN
Inventors: 魏然; 王超; 张乐; 吕晨熠; 章清泉; 李国超; 吴会云; 文新理
Original assignee: BEIJING BEIYE FUNCTIONAL MATERIALS Corp
Current assignee: BEIJING BEIYE FUNCTIONAL MATERIALS Corp
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2019-03-19
Anticipated expiration: 2038-11-27
Also published as: CN109487116B

Abstract

A kind of high-strength CTB alloy band and preparation method suitable for electrically conductive elastic component, belongs to CTB alloy band technical field.Its chemical component wt% is C 0~0.01%, and Ti 2.6~3.4%, Ce 0.001~0.2%, W+Ta+Hf+Fe≤0.3%, surplus is Cu and inevitable impurity.Final products performance are as follows: tensile strength is 1149~1230MPa, and yield strength is 1028~1100MPa, and thermal coefficient is 92~125W/ (m DEG C), and conductivity is 19~27%IACS, and crystallite dimension is 2~15 μm, and hardness is 320~370HV.Alloy production process includes: vacuum metling, forging, hot rolling, cold rolling, annealing, finished product rolling, timeliness, stress relief annealing.The advantage is that alloy strip steel rolled stock is high-intensitive, the matching of high heat conductance and high conductivity meets requirement of the electrically conductive elastic component to intensity, heat dissipation performance.

Description

High-strength CTB alloy band and preparation method suitable for electrically conductive elastic component

Technical field

The invention belongs to CTB alloy technical fields, in particular, provide a kind of suitable for the high-strength of electrically conductive elastic component CTB alloy band and preparation method.

Background technique

The strong Cu alloy material of superelevation is China's strategy type new industry, and it is super that superelevation strong elasticity copper alloy refers mainly to tensile strength The electrically conductive elastic copper alloy of 1000MPa is crossed, they, which are mainly used in, prepares electrically conductive elastic component, such as machine instrumentation, mold, temperature Spend controller, relay, auto-parts etc..Beryllium-bronze is typical precipitation strength type alloy, because it is with high intensity, hard Degree, elastic limit, and there are the series of advantages such as anti-corrosion, wear-resisting, endurance, low temperature resistant, it is used widely, is known as " king of coloured elastic material ".However, the beryllium in beryllium-bronze has toxicity, the safety issue in beryllium-bronze production and use is not Hold and ignores.

Titan bronze is a kind of novel copper-based precipitation strength type elastic alloy occurred phase late 1950s, multiple countries Scholar research carried out to the alloying component of titan bronze, mechanical performance etc., and part replaces beryllium-bronze, for manufacturing essence Close instrument, the elastic element of instrument, interconnector and wear part etc..Currently, the CTB alloy trade mark mainly have HPTC, NKT322, YCuT-M,YCuT-F.With the development of science and technology with progress, to adapt to increasingly harsher operating condition, to electrically conductive elastic Intensity, heat dissipation performance of component etc. require higher and higher, thus high-intensitive, high heat conductance and high conductivity to CTB alloy Matching proposes requirements at the higher level: tensile strength >=1100MPa, yield strength >=1000MPa, thermal coefficient >=90W/ (m DEG C), Conductivity >=19%IACS.

Summary of the invention

The purpose of the present invention is to provide a kind of suitable for the high-strength CTB alloy band of electrically conductive elastic component and preparation Method, makes tensile strength >=1100MPa of the alloy strip steel rolled stock, yield strength >=1000MPa, thermal coefficient >=90W/ (m DEG C), Conductivity >=19%IACS.

The chemical component mass percent of high strength titanium copper alloy band of the present invention are as follows: C 0~0.01%, Ti 2.6~ 3.4%, Ce 0.001~0.2%, W, Ta, Fe 0~0.3%, surplus are Cu and inevitable impurity.

The principle of present component design is as follows:

The addition of C:C element, on the one hand generates TiC in conjunction with Ti, and Dispersed precipitate can significantly improve alloy in crystal boundary Intensity；On the other hand, the resistivity that oversaturated Ti advantageously reduces alloy is consumed.

The addition of Ce:Ce element is conducive to purify alloy crystal boundary, improves the processing performance of alloy.

W, Ta, Hf and Fe: the addition of micro W, Ta, Hf can be used as crystallization nuclei refinement crystal grain, plays solution strengthening work With further increasing the intensity of alloy, the addition of Fe element improves alloy processing performance.

The preparation of alloy of the present invention is smelted using empty induction furnace, sufficiently to reduce and remove the gas and field trash in alloy Content.Alloy after smelting is forged, hot rolling, cold rolling and annealing (solid solution) alternately, cold rolling, timeliness, stress relief annealing etc. Process obtains finished product, and the technical parameter of specific process step and control is as follows:

(1) vacuum metling: relevant raw materials are packed into crucible after mixing in proportion.Alloy refining temperature is 1200~1250 DEG C, tapping temperature is 1160~1200 DEG C；

(2) slab of 60~80mm thickness forging, hot rolling: is forged at 700-920 DEG C；Slab is in 700-920 after forging Hot rolling is carried out at DEG C, hot rolling total deformation is 90~99%；

(3) cold rolling: alloy breaking down deformation amount controlling is 50~80%；

(4) anneal (solid solution): the alloy strip steel rolled stock after breaking down is annealed in protective atmosphere, and annealing (solid solution) temperature is 700~850 DEG C；Soaking time is 0.5~10min；

(5) finished product rolls: finished product rolling reduction is 10~50%；

(6) finished product timeliness: carrying out ageing treatment after finished product rolling, aging temp is 300 DEG C~500 DEG C, soaking time 1 ~for 24 hours；

(7) stress relief annealing: stress relief annealing is carried out as needed.

According to preparing needs, step (3) and (4) alternately, until appropriate size.

Using the above method produce alloy strip steel rolled stock, tensile strength be 1149~1230MPa, yield strength be 1028~ 1100MPa, thermal coefficient are 92~125W/ (m DEG C), and conductivity is 19~27%IACS, and crystallite dimension is 2~15 μm, firmly Degree is 320~370HV.Compared with existing CTB alloy band (comparative example 1, comparative example 2), alloy strip steel rolled stock of the present invention meets simultaneously High-intensitive, high heat conductance and high conductivity requirement.

Specific implementation method

Technical solution of the present invention is illustrated below by embodiment.

Embodiment 1:

Alloy specific chemical composition mass percent are as follows: C:0.005%, Ti:2.7%, Ce:0.05%, W:0.03%, Fe:0.16%, remaining Cu and inevitable impurity.

Titanium sponge, C and the Fe and Ce that cathode copper that purity is 99.9%, purity are 99.9% are packed into earthenware after mixing in proportion Crucible.It is smelted in vaccum sensitive stove, alloy refining temperature is 1250 DEG C, and tapping temperature is 1200 DEG C, is cast into steel ingot.Steel Ingot is swaged into 80mm thickness slab in 850 DEG C of heat preservations, and in 900 DEG C of heat preservation hot rollings, hot rolling deformation amount is 94%.Slab carries out just after hot rolling It rolling, breaking down deflection is 80%, then anneals at 850 DEG C, soaking time 120s.It is rolled, is become again after annealing Shape amount is 80%, is then dissolved at 850 DEG C, soaking time 90s.Finished product rolling, deflection are carried out to solid solution state band It is 40%.Then in 400 DEG C of progress timeliness, aging time 8h.Design parameter and performance details are as shown in table 1.

Embodiment 2:

Alloy specific chemical composition mass percent are as follows: C:0.003%, Ti:3.0%, Ce:0.03%, Ta:0.02%, Remaining Cu and inevitable impurity.It is prepared according to the corresponding ingredient of embodiment 2 and technique in table 1.

Embodiment 3:

Alloy specific chemical composition mass percent are as follows: C:0.008%, Ti:3.2%, W:0.02%, Ta:0.03%, Fe:0.18%, remaining Cu and inevitable impurity.It is prepared according to the corresponding ingredient of embodiment 3 and technique in table 1.

Embodiment 4:

Alloy specific chemical composition mass percent are as follows: C:0.006%, Ti:3.4%, Ce:0.03%, Hf:0.03%, Fe:0.20%, remaining Cu and inevitable impurity.It is prepared according to the corresponding ingredient of embodiment 4 and technique in table 1.

Embodiment 5:

Alloy specific chemical composition mass percent are as follows: C:0.007%, Ti:2.9%, Ce:0.03%, W:0.10%, Ta:0.05%, remaining Cu and inevitable impurity.It is prepared according to the corresponding ingredient of embodiment 5 and technique in table 1.

Table 1

Claims

1. a kind of high-strength CTB alloy band suitable for electrically conductive elastic component, which is characterized in that chemical component quality percentage Than for C 0~0.01%, Ti 2.6~3.4%, Ce 0.001~0.2%, W+Ta+Hf+Fe≤0.3%, surplus is Cu and not Evitable impurity.

2. high-strength CTB alloy according to claim 1, which is characterized in that the tensile strength of the alloy strip steel rolled stock be 1149~ 1230MPa, yield strength are 1028~1100MPa, and thermal coefficient is 92~125W/ (m DEG C), and conductivity is 19~27% IACS, crystallite dimension are 2~15 μm, and hardness is 320~370HV.

3. a kind of preparation method of high-strength CTB alloy band as claimed in claim 1 or 2, which is characterized in that specific process step And the technical parameter of control is as follows:

(1) vacuum metling: relevant raw materials are packed into crucible after mixing in proportion；Alloy refining temperature is 1200~1250 DEG C, out Steel temperature is 1160~1200 DEG C；

(2) slab of 60~80mm thickness forging, hot rolling: is forged at 700~920 DEG C；Slab is at 700~920 DEG C after forging Lower carry out hot rolling, hot rolling total deformation are 90~99%；

(4) anneal: the alloy strip steel rolled stock after breaking down is annealed in protective atmosphere, and annealing temperature is 700~850 DEG C；When heat preservation Between be 0.5~10min；

(5) finished product rolls: finished product rolling reduction is 10~50%；

(6) finished product timeliness: carrying out ageing treatment after finished product rolling, and aging temp is 300 DEG C~500 DEG C, and soaking time is 1~ 24h；

(7) stress relief annealing: stress relief annealing is carried out as needed.

4. according to the method described in claim 3, it is characterized in that, according to needs are prepared, step (3) and (4) alternately, until Appropriate size.