http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111822700-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F2003-248 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F1-0003 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-1017 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-1035 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-1007 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F3-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F3-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F3-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F3-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F1-14 |
| filingDate | 2020-07-24^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-02-18^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-02-18^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-111822700-B |
| titleOfInvention | Method for eliminating internal quality defects of tungsten alloy |
| abstract | The invention discloses a method for eliminating internal quality defects of tungsten alloy, which comprises the following steps: firstly, mixing iron powder or copper powder with tungsten powder, nickel powder and cobalt powder to obtain mixed powder; secondly, pressing the mixed powder into a green compact and trimming; thirdly, sintering the trimmed pressed compact to obtain a sticky lump; fourthly, placing the bonding block on the top end of the tungsten alloy base material with quality defects inside, and sintering to obtain a tungsten alloy sintered blank; fifthly, carrying out internal quality ultrasonic flaw detection on the tungsten alloy sintered blank; and sixthly, carrying out vacuum heat treatment or quenching treatment on the tungsten alloy sintered blank qualified by detection to obtain the tungsten alloy with the internal quality defect eliminated. According to the invention, the low-melting-point alloy sticky lumps are melted and then flow to the positions with quality defects such as looseness, cracks and the like in the tungsten alloy matrix material through solid phase diffusion and liquid phase diffusion to eliminate the defects, so that the internal quality problems of looseness, cracks and the like in the core part of the tungsten alloy product in the liquid phase sintering process are solved, and the waste of resources is avoided. |
| priorityDate | 2020-07-24^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
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