http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-103276350-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_a2e385317de38163ee2afd4b8405b11d |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C8-42 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23C12-02 |
| filingDate | 2013-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c855f9952b24ba6fb7ae5bf18749f0de http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8e5ec27d8b74e021cbef30212f7750af http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d539848e38857ac8fd747b6c2e95263c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9bbc7a442b41a74cb33e4e95730e0c0c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_5c968a0f0304b3f7208bd366617e75d0 |
| publicationDate | 2013-09-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-103276350-A |
| titleOfInvention | Surface thermal treatment method of screw |
| abstract | The invention relates to a surface thermal treatment method of a screw. The surface thermal treatment method comprises the following steps of: (1), carrying out degreasing, acid activating and deionized water-washing treatment onto a screw workpiece in sequence; (2), drying the screw pretreated in the step (2), and removing the residual water on the surface; (3), carrying out gas nitrogen-sulfur-chrome leakage treatment on the screw, placing the workpiece to an electric heating furnace with a gas mixture of gas complex of sulfur chrome and nitrogen gas to carry out nitrogen-sulfur-chrome leakage treatment; (4), carrying out sand blasting or shot blasting treatment on the screw workpiece, and removing a surface loose layer; (5), carrying out oxidation treatment on the screw workpiece, placing the workpiece to the electric heating furnace with liquid oxide salt, and immersing to oxide salt molten liquid; and (6), repeating the steps (3)-(5) by once or twice or more, forming a super-hard surface tissue on the surface of the wokpiece to complete the surface treatment of the screw workpiece. According to the surface thermal treatment method of the screw, a layer of nitrogen-sulfur-chrome-iron compound with a thickness of 15 microns-45 microns is formed on the surface of the screw, so that the surface hardness, the abrasion resistance and the corrosion resistance of the screw are improved. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106947848-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106947848-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104630696-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-108796501-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-111251193-A |
| priorityDate | 2013-05-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 45.