http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-S63125602-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c186e9ae8cafab5df5c8d80cfa7b0fa1 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-12146 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-12021 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/Y10T428-12056 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F2998-00 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F5-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B22F7-06 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B23B27-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F7-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B22F7-06 |
| filingDate | 1986-11-12^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e0ceff3291cde3354e2db15a55d10092 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_78fdb1f54b867ece11b1f542a6321c05 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_7a4254a7d03f2acc9fe8e270ea5419b7 |
| publicationDate | 1988-05-28^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-S63125602-A |
| titleOfInvention | Hard alloy for tool |
| abstract | PURPOSE:To eliminate the unbalance between the compressive strength and tensile strength of a hard alloy and to improve the strength thereof by using a material having a different coefft. of thermal expansion from the coefft. of thermal expansion of the working part of a tool for the non-working part of the tool and diffusively joining the working part and the non-working part to each other. CONSTITUTION:The hard alloy for the tool is constituted of a hard phase consisting of carbide, nitride or carbonitride of IV, V and VI groups and a bond phase of iron family metals and is divided to the working part and the non-working part. The material having the coefft. of thermal expansion different from the coefft. of thermal expansion of the working part 1 is used for the material of the non-working part 2. The working part 1 and the non-working part 2 are diffusively joined 3 to each other. The non-working part 2 shrinks at the ratio higher than the ratio in the working part 1 after the diffusion joining if, for example, the material having the higher coefft. of thermal expansion is used for the non-working part 2. The working part 1 shrinks more largely than its own shrinkage rate and, therefore, the compressive stress remains therein. As a result, the tensile strength is improved by as much as the residual compressive stress in the working part 1. |
| priorityDate | 1986-11-12^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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