CN103160761A - Method of guaranteeing hardness of welded closed impeller after welding - Google Patents
Method of guaranteeing hardness of welded closed impeller after welding Download PDFInfo
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- CN103160761A CN103160761A CN2011104223984A CN201110422398A CN103160761A CN 103160761 A CN103160761 A CN 103160761A CN 2011104223984 A CN2011104223984 A CN 2011104223984A CN 201110422398 A CN201110422398 A CN 201110422398A CN 103160761 A CN103160761 A CN 103160761A
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Abstract
The invention provides a method of guaranteeing hardness of welded closed impeller after welding. The method is characterized in that aluminium alloy closed impeller, after a conventional machining and welding, is taken out of a salt bath furnace, put into a boiling water of 100 DEG C for fried salt treatment within two minutes, with a time being controlled in 30-50 minutes, and then is subjected to an artificial aging for 10-12 hours under a temperature of 160-180 DEG C, so that the hardness HB of the aluminium alloy closed impeller after welding is more than or equal to 100.
Description
Technical field
The present invention relates to a kind of method that guarantees welded type trash-type impeller postwelding hardness, this trash-type impeller material is generally aluminium alloy, requires hardness to be generally: HB 〉=100.
Background technology
Trash-type impeller is as the key part of turbine (Turbine) machinery, as: whizzer integral wheel, naval vessel with the water-jet propulsor impeller etc.Be widely used for the fields such as Aeronautics and Astronautics (liquid rocket pump), navigation, military affairs, scientific research, accurate apparatus, high-precision medical facilities, its quality directly affects its aerodynamic property and mechanical efficiency.
The present processing mode of trash-type impeller has three kinds:
1, integral casting forming, part material are organized comparatively loose, and intensity is relatively poor, and supporting capacity is lower;
2, direct mechanical machine-shaping adopts cylindrical bar to be machined into type, and the manufacturing technology difficulty is large, such impeller has certain limitation to blade wheel structure, narrow, leaf curling rate as unsuitable in runner can not be excessive etc., otherwise cutter can't enter, and naturally just can't carry out machining;
3, welding fabrication, welding fabrication are one of Main Means of present trash-type impeller processing, and it is subjected to the impact of blade, runner width less, the narrowest trash-type impeller that reaches 0.6mm of the method welding width of flow path.What welding process mainly adopted is salt-bath dip brazing, and the impeller that this mode is welded tends to that the hardness of material is had certain impact, and postwelding is difficult to guarantee the original hardness value of material.
In the past after salt-bath dip brazing the hardness value of part material all by thermal treatment: timeliness guarantees quench---tempering---, adopt this method, the processing quality of part is difficult to control, as quench and easily cause part material crackle to occur or the sealing-off phenomenon occurs, the process-cycle of part is long in addition, cost is high, is difficult to satisfy the demand of present war products high speed development.
Summary of the invention
Purpose of the present invention just is to provide a kind of simpler, economic, efficient method for guaranteeing of material hardness value after salt-bath dip brazing, just need not to heat-treat directly Assurance component hardness, i.e. after part soldering by reasonably controlling the just direct hardness requirement of Assurance component of artificially aged temperature and time.
The present invention is achieved in that
The aluminium alloy trash-type impeller is after carrying out conventional mechanical processing and welding, part is taken out from salt bath furnace, within 2 minutes, the boiling water of putting into 100 ℃ explodes the salt processing, time is controlled at 30 minutes～and 50 minutes, then carry out 10～12 hours artificial agings under 160 ℃～180 ℃ temperature condition, make hardness HB 〉=100 after the welding of aluminium alloy trash-type impeller.
Specific embodiment
The example that is processed as with trash-type impeller on certain cooling turbine unit, this impeller is not when adopting the method for the invention to process, adopt heat treated mode to reach the hardness requirement of assembly after salt-bath dip brazing, but in actual procedure, find after thermal treatment that for the first time impeller hardness does not reach requirement, its HB≤100 are so carried out thermal treatment for the second time, after thermal treatment, find that crackle has appearred in impeller material for the second time.In order to address the above problem, adopt the method for assurance welded type trash-type impeller postwelding hardness of the present invention, after aluminium alloy trash-type impeller on certain cooling turbine unit is carried out conventional mechanical processing and welding, part takes out from salt bath furnace, the boiling water of putting into 100 ℃ in 2 minutes explodes salt processing 30 minutes, then directly carry out artificial aging after the salt slag being separated out totally, carry out 12 hours artificial agings under 160 ℃ of temperature condition, through check, aluminium alloy trash-type impeller hardness is guaranteed, HB 〉=100.
Adopt the method for assurance welded type trash-type impeller postwelding hardness of the present invention, through the processing checking of nearly 10 batches, crackle did not appear in impeller material.
Claims (1)
1. method that guarantees welded type trash-type impeller postwelding hardness, it is characterized in that: the aluminium alloy trash-type impeller is after carrying out conventional mechanical processing and welding, part is taken out from salt bath furnace, within 2 minutes, the boiling water of putting into 100 ℃ explodes the salt processing, time is controlled at 30 minutes～and 50 minutes, then carry out 10～12 hours artificial agings under 160 ℃～180 ℃ temperature condition, make hardness HB 〉=100 after the welding of aluminium alloy trash-type impeller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104223984A CN103160761A (en) | 2011-12-16 | 2011-12-16 | Method of guaranteeing hardness of welded closed impeller after welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104223984A CN103160761A (en) | 2011-12-16 | 2011-12-16 | Method of guaranteeing hardness of welded closed impeller after welding |
Publications (1)
| Publication Number | Publication Date |
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| CN103160761A true CN103160761A (en) | 2013-06-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011104223984A Pending CN103160761A (en) | 2011-12-16 | 2011-12-16 | Method of guaranteeing hardness of welded closed impeller after welding |
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| CN (1) | CN103160761A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111500846A (en) * | 2020-05-09 | 2020-08-07 | 贵州永红航空机械有限责任公司 | Heat treatment method of welded closed impeller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709366B (en) * | 2009-11-03 | 2011-07-20 | 贵州安吉有色铸造有限责任公司 | Heat treatment method for improving mechanical property of thin-wall case aluminium alloy castings |
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2011
- 2011-12-16 CN CN2011104223984A patent/CN103160761A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101709366B (en) * | 2009-11-03 | 2011-07-20 | 贵州安吉有色铸造有限责任公司 | Heat treatment method for improving mechanical property of thin-wall case aluminium alloy castings |
Non-Patent Citations (1)
| Title |
|---|
| （美）美国金属学会主编: "《金属手册》", 31 July 1994, article "铝合金的钎焊", pages: 1335,1340 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111500846A (en) * | 2020-05-09 | 2020-08-07 | 贵州永红航空机械有限责任公司 | Heat treatment method of welded closed impeller |
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Application publication date: 20130619 |