CN102643104B - Diffusion bonding method of zirconium diboride-silicon carbide composite material and metal alloy - Google Patents
Diffusion bonding method of zirconium diboride-silicon carbide composite material and metal alloy Download PDFInfo
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- CN102643104B CN102643104B CN 201210149336 CN201210149336A CN102643104B CN 102643104 B CN102643104 B CN 102643104B CN 201210149336 CN201210149336 CN 201210149336 CN 201210149336 A CN201210149336 A CN 201210149336A CN 102643104 B CN102643104 B CN 102643104B
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Abstract
The invention relates to a bonding method of a zirconium diboride-silicon carbide composite material and a metal alloy, particularly a diffusion bonding method of a zirconium diboride-silicon carbide composite material and a metal alloy. The invention aims to solve the problem of low strength of the active brazed joint of the existing zirconium diboride-silicon carbide composite material and metal alloy. The method comprises the following steps: 1. pretreating the zirconium diboride-silicon carbide composite material and the metal alloy; 2 pretreating a foam nickel middle layer; and 3. carrying out diffusion welding bonding. The method relieves the joint stress, and enhances the joint strength. The shear strength of the diffusion welding joint obtained by the method is 176.5-208.1MPa, andis enhanced by 76-197% as compared with the shear strength of the bonding joint by a brazing process. The invention can be used in the field of diffusion welding bonding.
Description
Technical field
The present invention relates to the method for attachment of zirconium diboride composite material of silicon carbide and metal alloy.
Background technology
Zirconium diboride (ZrB
2) based composites is a kind of novel ultrahigh-temperature structured material, it has excellent stability at elevated temperature, high conductivity, high thermoconductivity and stronger anti-ablation ability, can be widely used in aerospace, weaponry and other industrial circles.But because the zirconium diboride composite material of silicon carbide has higher hardness and fragility, there is big difficulty in preparation large size complex component.Therefore realize that particularly reliable connection of high temperature alloy is that it is in engineering field key in application with other materials for it.At present, method for brazing is mainly adopted in the method for attachment of zirconium diboride composite material of silicon carbide and metal alloy, utilizing active element (as Ti, Zr, Pd etc.) to form with the reaction of zirconium diboride composite material of silicon carbide ceramic matrix is connected, because the thermal expansivity of solder and zirconium diboride composite material of silicon carbide differs bigger, cause the brazed joint stress concentration easily, thereby cause strength of joint to reduce.
Summary of the invention
The objective of the invention is the low problem of active soldering strength of joint in order to solve existing zirconium diboride composite material of silicon carbide and metal alloy, and the diffusion method of attachment of zirconium diboride composite material of silicon carbide and metal alloy is provided.
Zirconium diboride composite material of silicon carbide among the present invention and the diffusion method of attachment of metal alloy are to carry out according to the following steps:
One, the pre-treatment of zirconium diboride composite material of silicon carbide and metal alloy: with zirconium diboride composite material of silicon carbide and the connected metal alloy of desire after new surface is exposed in polishing, be under 80 ~ 120W condition at ultrasonic power, clean 5 ~ 10min with acetone, dry then;
Two, the pre-treatment in nickel foam middle layer: be under 80 ~ 120W condition with the nickel foam middle layer at ultrasonic power, clean 5 ~ 10min with acetone, dry to be placed on to form between zirconium diboride composite material of silicon carbide and the metal alloy and treat weldment;
Three, diffusion welding connects: the weldment for the treatment of with obtaining in the step 2, place Vacuum diffusion bonding furnace, and Vacuum diffusion bonding furnace is evacuated to 5 * 10
-4~ 5 * 10
-2Pa, by last push-down head zirconium diboride composite material of silicon carbide and metal alloy are applied the pressure that size is 20 ~ 40MPa, then Vacuum diffusion bonding furnace is warming up to diffusion welding with the speed of 30 ℃/min and connects 600 ~ 1000 ℃ of temperature, and be incubated 60 ~ 120min, speed with 10 ℃/min is cooled to 300 ℃ then, treat the weldment furnace cooling at last, namely finish the zirconium diboride composite material of silicon carbide and be connected with the diffusion welding of metal alloy;
Wherein said nickel foam middle layer is the battery industry nickel foam, and porosity is 90% ~ 98%, and thickness is 1 ~ 6mm, and described metal alloy is nickel base superalloy, titanium alloy or niobium alloy.
The present invention can improve the mechanism of joint strength of joint: nickel foam has tridimensional network, porosity is higher, during as the diffusion welding middle layer, under the effect of pressure, deform, the part hole is kept and is evenly distributed on weld seam intermediate formation porous middle layer, this porous middle layer has higher intensity and plastic deformation ability concurrently, can absorb because the unrelieved stress that mother metal thermal expansivity difference produces.In addition, nickel foam middle layer and zirconium diboride composite material of silicon carbide form discontinuous diffusion layer at the linkage interface place, for the continuous diffusion layer that conventional diffusion weldering use tinsel middle layer produces, this method can further be regulated stress distribution, strengthens the joint strength of joint.
Beneficial effect of the present invention:
1, nickel foam has tridimensional network, porosity is higher, during as the diffusion welding middle layer, under the effect of pressure, deform, the part hole is kept and is evenly distributed on weld seam intermediate formation porous middle layer, this porous middle layer has higher intensity and plastic deformation ability concurrently, can absorb because the unrelieved stress that mother metal thermal expansivity difference produces strengthens the joint strength of joint.
2, nickel foam middle layer and zirconium diboride composite material of silicon carbide form discontinuous diffusion layer at the linkage interface place, for the continuous diffusion layer that conventional diffusion weldering use tinsel middle layer produces, this method can further be regulated stress distribution, strengthens the joint strength of joint.
3, the diffusion welding joint shearing resistance with the inventive method acquisition zirconium diboride composite material of silicon carbide and metal alloy is 176.5MPa ~ 208.1MPa, improved 76% ~ 197% than the zirconium diboride composite material of silicon carbide and the metal alloy jointing shearing resistance that adopt method for brazing, improved 20% ~ 27% than zirconium diboride composite material of silicon carbide and the metal alloy diffusion welding joint shearing resistance of using pure Ni paper tinsel as the middle layer.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: the diffusion method of attachment of zirconium diboride composite material of silicon carbide and metal alloy is carried out according to the following steps in the present embodiment:
One, the pre-treatment of zirconium diboride composite material of silicon carbide and metal alloy: with zirconium diboride composite material of silicon carbide and the connected metal alloy of desire after new surface is exposed in polishing, be under 80 ~ 120W condition at ultrasonic power, clean 5 ~ 10min with acetone, dry then;
Two, the pre-treatment in nickel foam middle layer: be under 80 ~ 120W condition with the nickel foam middle layer at ultrasonic power, clean 5 ~ 10min with acetone, dry to be placed on to form between zirconium diboride composite material of silicon carbide and the metal alloy and treat weldment;
Three, diffusion welding connects: the weldment for the treatment of with obtaining in the step 2, place Vacuum diffusion bonding furnace, and Vacuum diffusion bonding furnace is evacuated to 5 * 10
-4~ 5 * 10
-2Pa, by last push-down head zirconium diboride composite material of silicon carbide and metal alloy are applied the pressure that size is 20 ~ 40MPa, then Vacuum diffusion bonding furnace is warming up to diffusion welding with the speed of 30 ℃/min and connects 600 ~ 1000 ℃ of temperature, and be incubated 60 ~ 120min, speed with 10 ℃/min is cooled to 300 ℃ then, treat the weldment furnace cooling at last, namely finish the zirconium diboride composite material of silicon carbide and be connected with the diffusion welding of metal alloy;
Wherein said nickel foam middle layer is the battery industry nickel foam, and porosity is 90% ~ 98%, and thickness is 1 ~ 6mm, and described metal alloy is nickel base superalloy, titanium alloy or niobium alloy.
The present invention can improve the mechanism of joint strength of joint: nickel foam has tridimensional network, porosity is higher, during as the diffusion welding middle layer, under the effect of pressure, deform, the part hole is kept and is evenly distributed on weld seam intermediate formation porous middle layer, this porous middle layer has higher intensity and plastic deformation ability concurrently, can absorb because the unrelieved stress that mother metal thermal expansivity difference produces.In addition, nickel foam middle layer and zirconium diboride composite material of silicon carbide form discontinuous diffusion layer at the linkage interface place, for the continuous diffusion layer that conventional diffusion weldering use tinsel middle layer produces, this method can further be regulated stress distribution, strengthens strength of joint.
Beneficial effect of the present invention:
1, nickel foam has tridimensional network, porosity is higher, during as the diffusion welding middle layer, under the effect of pressure, deform, the part hole is kept and is evenly distributed on weld seam intermediate formation porous middle layer, this porous middle layer has higher intensity and plastic deformation ability concurrently, can absorb because the unrelieved stress that mother metal thermal expansivity difference produces.
2, nickel foam middle layer and zirconium diboride composite material of silicon carbide form discontinuous diffusion layer at the linkage interface place, for the continuous diffusion layer that conventional diffusion weldering use tinsel middle layer produces, this method can further be regulated stress distribution, strengthens strength of joint.
3, the diffusion welding joint shearing resistance with the inventive method acquisition zirconium diboride composite material of silicon carbide and metal alloy is 176.5MPa ~ 208.1MPa, improved 76% ~ 197% than the zirconium diboride composite material of silicon carbide and the metal alloy jointing shearing resistance that adopt method for brazing, improved 20% ~ 27% than zirconium diboride composite material of silicon carbide and the metal alloy diffusion welding joint shearing resistance of using pure Ni paper tinsel as the middle layer.
Embodiment two: what present embodiment and embodiment one were different is: be under 90 ~ 110W condition at ultrasonic power in the step 1, clean 6 ~ 9min with acetone.Other step is identical with embodiment one with parameter.
Embodiment three: what present embodiment was different with embodiment one or two is: be under 90 ~ 110W condition at ultrasonic power in the step 2, clean 6 ~ 9min with acetone.Other step is identical with embodiment one or two with parameter.
Embodiment four: what present embodiment was different with one of embodiment one to three is: in the step 3 Vacuum diffusion bonding furnace is evacuated to 6 * 10
-4~ 5 * 10
-3Pa.Other step is identical with one of embodiment one to three with parameter.
Embodiment five: what present embodiment was different with one of embodiment one to three is: in the step 3 Vacuum diffusion bonding furnace is evacuated to 7.5 * 10
-4Pa.Other step is identical with one of embodiment one to three with parameter.
Embodiment six: what present embodiment was different with one of embodiment one to five is: by last push-down head zirconium diboride composite material of silicon carbide and metal alloy are applied the pressure that size is 25 ~ 35MPa in the step 3.Other step is identical with one of embodiment one to five with parameter.
Embodiment seven: what present embodiment was different with one of embodiment one to five is: by last push-down head zirconium diboride composite material of silicon carbide and metal alloy are applied the big or small pressure of 30MPa that is in the step 3.Other step is identical with one of embodiment one to five with parameter.
Embodiment eight: what present embodiment was different with one of embodiment one to seven is: it is 700 ~ 900 ℃ that diffusion welding described in the step 3 connects temperature.Other step is identical with one of embodiment one to seven with parameter.
Embodiment nine: what present embodiment was different with one of embodiment one to eight is: soaking time described in the step 3 is 80 ~ 100min.Other step is identical with one of embodiment one to eight with parameter.
Embodiment ten: what present embodiment was different with one of embodiment one to eight is: soaking time described in the step 3 is 90min.Other step is identical with one of embodiment one to eight with parameter.
For verifying that beneficial effect of the present invention has carried out following experiment:
Experiment one: the zirconium diboride composite material of silicon carbide in this experiment and the diffusion method of attachment of metal alloy are carried out according to the following steps:
One, with zirconium diboride composite material of silicon carbide and the connected titanium alloy of desire (model is TC4) after new surface is exposed in polishing, be under the 100W condition at ultrasonic power, clean 10min with acetone, dry then;
Two, be under the 100W condition with the nickel foam middle layer at ultrasonic power, clean 10min with acetone, dry to be placed on to form between zirconium diboride composite material of silicon carbide and the titanium alloy to be welded and treat weldment;
Three, with the weldment for the treatment of that obtains in the step 2, place Vacuum diffusion bonding furnace, Vacuum diffusion bonding furnace is evacuated to 6 * 10
-4Pa, by last push-down head zirconium diboride composite material of silicon carbide and titanium alloy are applied the big or small pressure of 35MPa that is, then Vacuum diffusion bonding furnace is warming up to the speed of 30 ℃/min and connects 900 ℃ of temperature, and insulation 100min, speed with 10 ℃/min is cooled to 300 ℃ then, treat the weldment furnace cooling at last, namely finish the zirconium diboride composite material of silicon carbide and be connected with the diffusion welding of titanium alloy.
Diffusion welding joint shearing resistance with the inventive method acquisition zirconium diboride composite material of silicon carbide and titanium alloy is 191.5MPa after testing, and the active soldering shearing strength of joint of zirconium diboride composite material of silicon carbide and titanium alloy is 90.5MPa, shearing resistance has improved 112%, has strengthened the joint strength of joint significantly.
Claims (10)
1. the diffusion method of attachment of zirconium diboride composite material of silicon carbide and metal alloy is characterized in that it realizes by following steps:
One, the pre-treatment of zirconium diboride composite material of silicon carbide and metal alloy: with zirconium diboride composite material of silicon carbide and the connected metal alloy of desire after new surface is exposed in polishing, be under 80 ~ 120W condition at ultrasonic power, clean 5 ~ 10min with acetone, dry then;
Two, the pre-treatment in nickel foam middle layer: be under 80 ~ 120W condition with the nickel foam middle layer at ultrasonic power, clean 5 ~ 10min with acetone, dry to be placed on to form between zirconium diboride composite material of silicon carbide and the metal alloy and treat weldment;
Three, diffusion welding connects: the weldment for the treatment of with obtaining in the step 2, place Vacuum diffusion bonding furnace, and Vacuum diffusion bonding furnace is evacuated to 5 * 10
-4~ 5 * 10
-2Pa, by last push-down head zirconium diboride composite material of silicon carbide and metal alloy are applied the pressure that size is 20 ~ 40MPa, then Vacuum diffusion bonding furnace is warming up to diffusion welding with the speed of 30 ℃/min and connects 600 ~ 1000 ℃ of temperature, and be incubated 60 ~ 120min, speed with 10 ℃/min is cooled to 300 ℃ then, treat the weldment furnace cooling at last, namely finish the zirconium diboride composite material of silicon carbide and be connected with the diffusion welding of metal alloy;
Wherein said nickel foam middle layer is the battery industry nickel foam, and porosity is 90% ~ 98%, and thickness is 1 ~ 6mm, and described metal alloy is nickel base superalloy, titanium alloy or niobium alloy.
2. the diffusion method of attachment of zirconium diboride composite material of silicon carbide as claimed in claim 1 and metal alloy is characterized in that in the step 1 at ultrasonic power being under 90 ~ 110W condition, cleans 6 ~ 9min with acetone.
3. the diffusion method of attachment of zirconium diboride composite material of silicon carbide as claimed in claim 1 and metal alloy is characterized in that in the step 2 at ultrasonic power being under 90 ~ 110W condition, cleans 6 ~ 9min with acetone.
4. as the diffusion method of attachment of each described zirconium diboride composite material of silicon carbide and metal alloy in the claim 1 to 3, it is characterized in that in the step 3 Vacuum diffusion bonding furnace being evacuated to 6 * 10
-4~ 5 * 10
-3Pa.
5. as the diffusion method of attachment of each described zirconium diboride composite material of silicon carbide and metal alloy in the claim 1 to 3, it is characterized in that in the step 3 Vacuum diffusion bonding furnace being evacuated to 7.5 * 10
-4Pa.
6. as the diffusion method of attachment of each described zirconium diboride composite material of silicon carbide and metal alloy in the claim 1 to 3, by last push-down head zirconium diboride composite material of silicon carbide and metal alloy are applied the pressure that size is 25 ~ 35MPa in the step 3.
7. as the diffusion method of attachment of each described zirconium diboride composite material of silicon carbide and metal alloy in the claim 1 to 3, by last push-down head zirconium diboride composite material of silicon carbide and metal alloy are applied the big or small pressure of 30MPa that is in the step 3.
8. as the diffusion method of attachment of each described zirconium diboride composite material of silicon carbide and metal alloy in the claim 1 to 3, it is 700 ~ 900 ℃ that diffusion welding described in the step 3 connects temperature.
9. as the diffusion method of attachment of each described zirconium diboride composite material of silicon carbide and metal alloy in the claim 1 to 3, soaking time described in the step 3 is 80 ~ 100min.
10. as the diffusion method of attachment of each described zirconium diboride composite material of silicon carbide and metal alloy in the claim 1 to 3, soaking time described in the step 3 is 90min.
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| CN103143805A (en) * | 2013-03-25 | 2013-06-12 | 哈尔滨工业大学 | Method for relieving residual stress of brazed joint |
| CN103214260B (en) * | 2013-04-22 | 2014-08-20 | 哈尔滨工业大学 | Method for performing diffusion bonding on DD3 high-temperature alloy and Ti3AlC2 ceramic by adopting Nb/Ni composite middle layer |
| CN104475898B (en) * | 2014-12-26 | 2016-04-27 | 哈尔滨工业大学 | The foreign material method for welding of porous interlayer structure brazed seam |
| CN106242606B (en) * | 2016-07-20 | 2019-09-13 | 哈尔滨工业大学 | A method of utilizing Zr-Ni base solder brazing ZrB2-SiC composite ceramics |
| CN107686906A (en) * | 2017-08-15 | 2018-02-13 | 东莞市联洲知识产权运营管理有限公司 | A kind of preparation method of zirconium boride enhancing chrome alum titanium alloy sheet |
| CN109851387B (en) * | 2019-01-02 | 2021-03-02 | 西安交通大学 | Metal and ceramic materialized double-strong-connection integrated component and preparation method thereof |
| CN109759665B (en) * | 2019-03-22 | 2021-06-01 | 中山大学 | Preparation method of TiB whisker reinforced ceramic/metal joint with three-dimensional net distribution |
| CN110079775B (en) * | 2019-04-30 | 2021-06-15 | 江苏理工学院 | Molybdenum alloy surface MoSi2Method for producing a coating |
| CN110508892B (en) * | 2019-09-12 | 2021-06-18 | 中山大学 | Method for connecting ZrC-SiC composite ceramic and austenitic stainless steel |
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| CN101550020B (en) * | 2009-05-13 | 2011-07-20 | 西北工业大学 | Method for connecting carbon/carbon composite material with nickel-based high-temperature alloy |
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