CN1883882A - Radial gradient ceramic blast nozzle - Google Patents
Radial gradient ceramic blast nozzle Download PDFInfo
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- CN1883882A CN1883882A CN 200610044361 CN200610044361A CN1883882A CN 1883882 A CN1883882 A CN 1883882A CN 200610044361 CN200610044361 CN 200610044361 CN 200610044361 A CN200610044361 A CN 200610044361A CN 1883882 A CN1883882 A CN 1883882A
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Abstract
The invention relates to a radial gradient ceramic sandblast nozzle prepared by hot-pressing sintering process with SiC as matrix and (W, Ti)C solid solution as hardening constituent, which belongs to the field of advanced production technology. The radial gradient ceramic sandblast nozzle is multilayer structure, and the components change gradually along nozzle radial direction, that is: the content of (W, Ti)C solid solution increases gradually from the inner hole surface of sandblast nozzle to the external wall of sandblast nozzle. Because the radial gradient change of components in ceramic sandblast nozzle, residual compressive stress forms on the surface of inner hole, so that the stress on the surface of the inner hole is relieved, erosion-proof and wearable performance is improved, and service life is prolonged.
Description
Technical field
The invention belongs to the advanced manufacturing technology field, relate to a kind of radial gradient ceramic blast nozzle, this blast nozzle is specially adapted to sand blasted surface and handles.
Background technology
Blast nozzle is the critical component that carries out on the various surface processing equipments.Blast nozzle requires to have high hardness and wearability, and has certain intensity and toughness.Ceramic material is the ideal material of preparation nozzle owing to have high hardness and anti-wear performance.Ceramic sand jet in the course of the work, the blast nozzle bore area bears serious abrasive material percussion, thereby produces bigger erosion stress at bore area, causes the bore area erosive wear of ceramic sand jet serious, the service life of having reduced ceramic sand jet.
English literature " Wear " (1995,118-183:148～155) has been reported B
4C ceramic sand jet, its material component are evenly to distribute, and do not have Gradient Effect; Chinese patent " patent No. ZL 02 1 35599.1 " has been reported B
4(W's C/, Ti) C ceramic sand jet, its material component evenly distribute, and do not have Gradient Effect.Chinese patent " application number: 200410024228.0 " has been reported Al
2O
3/ (W, Ti) C graded ceramics nozzle, this ceramic sand jet just component in the blast nozzle porch are the axial gradient distribution, only can improve the ability of the anti-impact erosion wearing and tearing at ceramic sand jet inlet position.Because the whole bore area of blast nozzle all will bear serious abrasive material percussion, for this reason, urgent need is sought a kind of new technology, alleviate the erosion stress that the whole bore area of ceramic sand jet causes owing to the abrasive material percussion, thereby improve the ability of ceramic sand jet anti-impact erosion wearing and tearing, to prolong its service life comprehensively.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of radial gradient ceramic blast nozzle is provided.The SiC that it is high with hardness and wearability is good is as matrix, and (W, Ti) C solid solution adopts the radial gradient ceramic blast nozzle of hot-pressing sintering technique preparation as hardening constituent.This graded ceramics blast nozzle is a sandwich construction, and component changes in gradient along the spout radius direction, that is: component gradually changes to the blast nozzle outer wall from the blast nozzle bore area.Because being gradient, the component of this ceramic sand jet changes, all formed residual compressive stress at its whole bore area, but partial offset carries the tension that causes outward, thereby can alleviate the stress of the whole bore area of ceramic sand jet, strengthen the ability of its anti-impact erosion wearing and tearing, improve its service life.
The present invention realizes in the following manner.
A kind of radial gradient ceramic blast nozzle, the composition that it is characterized in that this ceramic sand jet contains SiC and (W, Ti) C solid solution, its component changes in gradient along the spout radius direction, (W, Ti) C solid solution content is brought up to 50% of nozzle outer wall place by 20% (mass percent) at nozzle bore area place, and the gradient number of plies is more than or equal to 3, and its step of preparation process is as follows:
(1) with SiC be matrix, with (W, Ti) C solid solution is hardening constituent, (W, Ti) ((W, Ti) the C content range is the different SiC+ of C content: 20%～50% (mass percent) for W, Ti) C ceramic composite powder in configuration.
(2) with the SiC+ that configures (W, Ti) the C ceramic composite powder is strengthened ball milling respectively, with ethanol as medium, 200～250 hours ball milling time;
(3) ball milling is good SiC+ (sieve in the cupboard of nitrogen protection is arranged for W, Ti) drying in the C ceramic composite powder placement vacuum drying chamber by dry back;
(4) difference that drying is good (W, Ti) SiC+ of C content (W, Ti) the C ceramic composite powder is respectively charged in the graphite jig; According to (W, Ti) content of C solid solution is feeded graphite jig to the order that the blast nozzle outer wall increases gradually from the blast nozzle bore area;
(5) with nitrogen as sintering atmosphere, adopt hot-pressing sintering technique to prepare radial gradient ceramic blast nozzle.
In the above-mentioned step of preparation process (5), the hot pressed sintering temperature range is 1900～2000 ℃, and pressure is 30～35MPa, and temperature retention time is 50～60min.
Radial gradient ceramic blast nozzle by above-mentioned technology preparation, but the residual compressive stress partial offset that its bore area forms carries the tension that causes outward, thereby can alleviate the mechanical stress of ceramic sand jet bore area, improve the ability of the anti-impact erosion wearing and tearing of ceramic sand jet comprehensively.The sand blast erosion experimental result shows: the erosive wear of radial gradient ceramic blast nozzle can significantly strengthen by the common homogeneous ceramic blast nozzle of force rate, and improve service life greatly.
Description of drawings
Fig. 1 is a radial gradient ceramic blast nozzle structural representation of the present invention, and 1 is the nozzle bore area, and 2 is the nozzle outer wall.(W, Ti) content of C solid solution increases to the blast nozzle outer wall gradually from the blast nozzle bore area.
The specific embodiment:
Provide two most preferred embodiments of the present invention below:
Embodiment 1: with SiC is matrix, press solid solution (W, Ti) C content is pressed respectively: 20%, 35%, 50% mass percent takes by weighing raw material, disposes 3 kinds of differences (W, Ti) SiC+ of C content (W, Ti) C ceramic composite powder; Strengthen ball milling then respectively, with ethanol as medium, 200 hours ball milling time; The SiC+ that ball milling is good (W, Ti) the C ceramic composite powder is placed drying in the vacuum drying chamber, after the drying, sieves in the cupboard of the atmosphere that nitrogen protection is arranged; 3 kinds of difference (W that drying is good, Ti) SiC+ (W of C content, Ti) the C ceramic composite powder is respectively charged in the graphite jig, according to (W, Ti) content of C solid solution is feeded graphite jig to the order that the blast nozzle outer wall increases gradually from the blast nozzle bore area.As sintering atmosphere, adopt radially 3 layers of graded ceramics blast nozzle of hot-pressing sintering technique preparation with nitrogen, sintering temperature is 2000 ℃, and pressure is 35MPa, and temperature retention time is 60min.
Embodiment 2: as described in embodiment one, different is that 4 kinds (W, Ti) C content is pressed respectively: 30%, 40%, 50% SiC+ (W, Ti) C ceramic composite powder 20%, in configuration.Adopt radially 4 layers of graded ceramics blast nozzle of hot-pressing sintering technique preparation.Sintering temperature is 1950 ℃, and pressure is 30MPa, and temperature retention time is 50min.
Claims (2)
1. radial gradient ceramic blast nozzle, this graded ceramics blast nozzle is a sandwich construction, component changes in gradient along the spout radius direction, it is characterized in that, the composition of this ceramic sand jet contains SiC and (W, Ti) C solid solution, (W, Ti) C solid solution content gradually changes along the blast nozzle radial direction, brings up to 50% of nozzle outer wall place by 20% (mass percent) at nozzle bore area place, gradient layer quantity is more than or equal to 3, and its step of preparation process is as follows:
(1) with SiC be matrix, with (W, Ti) C solid solution is hardening constituent, configuration (W, Ti) the different SiC+ of C content (W, Ti) C ceramic composite powder, (W, Ti) the C content range is: 20%～50% (mass percent);
(2) with the SiC+ that configures (W, Ti) the C ceramic composite powder is strengthened ball milling respectively, with ethanol as medium, 200～250 hours ball milling time;
(3) ball milling is good SiC+ (sieve in the cupboard of nitrogen protection is arranged for W, Ti) drying in the C ceramic composite powder placement vacuum drying chamber by dry back;
(4) difference (W that drying is good, Ti) SiC+ (W of C content, Ti) the C ceramic composite powder is respectively charged in the graphite jig, according to (W, Ti) content of C solid solution is feeded graphite jig to the order that the blast nozzle outer wall increases gradually from the blast nozzle bore area;
(5) with nitrogen as sintering atmosphere, adopt hot-pressing sintering technique to prepare radial gradient ceramic blast nozzle.
2. a kind of radial gradient ceramic blast nozzle according to claim 1 is characterized in that, the hot-pressing sintering technique parameter is: the hot pressed sintering temperature is 1900～2000 ℃, and pressure is 30～35MPa, and temperature retention time is 50～60 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610044361 CN1883882A (en) | 2006-05-31 | 2006-05-31 | Radial gradient ceramic blast nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610044361 CN1883882A (en) | 2006-05-31 | 2006-05-31 | Radial gradient ceramic blast nozzle |
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|---|---|
| CN1883882A true CN1883882A (en) | 2006-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610044361 Pending CN1883882A (en) | 2006-05-31 | 2006-05-31 | Radial gradient ceramic blast nozzle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564935B (en) * | 2009-04-29 | 2010-06-02 | 哈尔滨工业大学 | Manufacture method of zirconia ceramics nozzle used for spinning spray printing |
| CN109366683A (en) * | 2018-09-21 | 2019-02-22 | 鲁东大学 | A kind of small radial thin stack ceramic sand jet based on 3D printing technique |
| CN115229688A (en) * | 2022-07-27 | 2022-10-25 | 怀化伯立迅科技有限公司 | Prevent mirror surface injection rifle head of static |
-
2006
- 2006-05-31 CN CN 200610044361 patent/CN1883882A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101564935B (en) * | 2009-04-29 | 2010-06-02 | 哈尔滨工业大学 | Manufacture method of zirconia ceramics nozzle used for spinning spray printing |
| CN109366683A (en) * | 2018-09-21 | 2019-02-22 | 鲁东大学 | A kind of small radial thin stack ceramic sand jet based on 3D printing technique |
| CN115229688A (en) * | 2022-07-27 | 2022-10-25 | 怀化伯立迅科技有限公司 | Prevent mirror surface injection rifle head of static |
| CN115229688B (en) * | 2022-07-27 | 2023-12-05 | 怀化伯立迅科技有限公司 | Antistatic mirror surface spray gun head |
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