Surface-wrapped cutting tool
A technology of surface coating and cutting tools, which is applied in the direction of manufacturing tools, workpieces, drilling tool accessories, etc., can solve the problems of crescent damage, wear, lack of lubricity or smoothness, etc., to achieve difficult peeling, excellent wear resistance, Effect of improving lubricity and smoothness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0056] Preparation of alumina sol for lower layer formation:
[0057] First, alcohols (such as ethanol, 1-n-butanol) are added to aluminum alkoxides (such as aluminum sec-butoxide, aluminum propoxide), and acids (such as hydrochloric acid, nitric acid) are further added (at the same time, the average particle size can also be added α-alumina particles of 10 to 300 nm), stirring is performed at a temperature range of 10° C. or lower, and an aging treatment is performed, for example, for 12 hours or more to form an alumina sol.
[0058] The alumina sol for lower layer formation preferably contains 8.0 to 13.0% by mass of aluminum alkoxide, 30.0 to 50.0% by mass of alcohol, and 1.0 to 3.0% by mass of acid.
[0059] In addition, from the viewpoint of producing a uniform sol, when adding alcohol, in order to perform low-temperature film formation based on the promotion of crystal nucleation when forming the crystalline alumina layer to be the lower layer 2, and to improve crystalli...
Embodiment 1
[0095] As raw material powders, fine-grained WC powder with an average particle diameter of 0.8 μm, medium-grained WC powder with an average particle diameter of 2 to 3 μm, TiCN powder, ZrC powder, TaC powder, and NbC powder with an average particle diameter of 1 to 3 μm were prepared. Cr3C2 powder and Co powder, these raw material powders are combined into the predetermined compounding composition shown in Table 1, further add the paraffin wax that is 0.5 mass part with respect to raw material powder 100 mass parts and ball mill and mix in 250 mass parts of acetone for 24 hours, reduce Powder was obtained after pressing and drying. Thereafter, a green compact of a predetermined shape was press-molded using the powder at a pressure of 98 MPa, and vacuum-sintered at a temperature of 1400° C. for 1 hour in a vacuum of 5 Pa to obtain a sintered body. Afterwards, the cutting edge of the sintered body is subjected to R: 0.05mm edge grinding process to manufacture WC-based cemented ...
Embodiment 2
[0120] After the base layer was formed on the tool bases A, B, C, and D in the same manner as in Example 1, the base layer was not formed on the tool bases E, F, G, H, and I, and the sol-gel method was used until the specified A crystalline alumina layer was formed up to the target layer thickness to form a lower layer, and a concave portion forming process was performed on each tool base under various conditions shown in Table 3. Table 4 shows the average values of the shape and size of the concave portions measured by scanning electron microscope observation of longitudinal sections of the concave portions formed in the lower layers of the tool bases A to I.
[0121] Next, the above-mentioned tool bases A to I covered with the lower layer were respectively coated by the following steps (I) to (III) by a sol-gel method to form an upper layer, that is, an amorphous silicon oxide layer.
[0122] (I) First, the solution composition of each component in the reaction raw materia...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Average layer thickness | aaaaa | aaaaa |
| Average layer thickness | aaaaa | aaaaa |
| Average depth | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More