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Orthodontic clamp with PVD coating and preparation method thereof

A coating and orthodontic technology, applied in coating, metal material coating technology, orthodontics and other directions, can solve the problems of high cost of cemented carbide, damage of orthodontic forceps, blackening of cemented carbide, etc. Production cost, convenient manufacturing process, and the effect of increasing the bonding force

Inactive Publication Date: 2020-02-14
金华新亚机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the orthodontic forceps on the market generally increase the hardness of the beak by the following methods: (1) The orthodontic forceps are made of stainless steel as a whole, but the hardness of the beak can only reach about HRC 56
(2) Carbide is welded at the beak of the pliers to meet the requirement of high hardness, but this method has great defects, mainly as follows: the welding between stainless steel and cemented carbide is not firm, and long-term use of cemented carbide will cause orthodontics Damage to the pliers and other adverse effects; when using, if the orthodontic pliers hit a hard object, the cemented carbide will be notched or broken directly; moreover, the cemented carbide will turn black after long-term use, forming a strong color difference with the stainless steel pliers handle , In addition, the cost of cemented carbide is too high, which increases the production cost
(3) A groove is opened in the beak area of ​​the pliers, and the cemented carbide is welded by laser cladding. However, the orthodontic pliers obtained by this method still have the problem of lower hardness at the beak, and nickel-containing materials are needed in the welding process. The safety of orthodontic forceps is not guaranteed
[0004] At present, there are few reports on the improvement of the beak performance of orthodontic forceps

Method used

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  • Orthodontic clamp with PVD coating and preparation method thereof
  • Orthodontic clamp with PVD coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The method for preparing the orthodontic forceps with PVD coating of the present invention comprises the steps:

[0035] (1) taking stainless steel as a raw material to manufacture orthodontic pliers rough blanks, and overall heat-treating the orthodontic pliers rough blanks;

[0036] (2) Finishing the rough orthodontic pliers to a preset shape;

[0037] (3) heat-treating the matrix at the jaws of the orthodontic pliers beak region again;

[0038] (4) Depositing a titanium compound coating on the beak region of the pliers by physical vapor deposition to obtain the orthodontic pliers with PVD coating.

[0039] During heat treatment in step (1), annealing treatment: heat up at 70°C / h to 750°C, hold for 3 hours, cool at 50°C / h to 500°C, and air-cool when out of the furnace; quenching treatment: quenching temperature is 850°C, hold for 30 minutes, and water-cool 10s, then the oil is cooled to room temperature; tempering treatment: conduct the first tempering at 480°C, hol...

Embodiment 2

[0046] The difference from Example 1 is that the titanium-containing compound coating prepared by PVD deposition is TiAlN, and the specific operation of the coating is: first deposit 5min TiN as a transition layer, adjust the pressure to 0.3Pa~1.2Pa, and open the Ti arc target at the same time material and Al arc target, the target bias voltage of Ti arc target is -10V~-100V, the target power is 0.2kW~1.0kW, the target bias voltage of Al arc target is -10V~-100V, and the target power is 0.2kW~0.8kW, wherein the substrate bias voltage is -50V~-150V, the power is 1.5kW~2.0kW; the deposition temperature is 460~480℃, the deposition time is 5~10min, and the nitrogen flow rate is adjusted to 100sccm~200sccm.

[0047] Specifically, the target bias voltage of the Ti arc target is -50V, the target power is 0.5kW, the target bias voltage of the Al arc target is -100V, the target power is 0.6kW, and the substrate bias voltage is -150V, and the power is 1.5 kW; the deposition temperature ...

Embodiment 3

[0049] It differs from Example 1 in that the titanium-containing compound coating prepared by PVD deposition is TiCN, and the specific operation of the coating is as follows: the vacuum degree of the coating chamber is 3 × 10-3Pa, and argon gas is introduced until the pressure is 1Pa. Glow cleaning was performed, followed by metal ion cleaning under high bias, and pure titanium was deposited as a transition layer for 3 min. Adjust the pressure to 0.3Pa ~ 1.6Pa, turn on the Ti arc target, the target bias voltage of the Ti arc target is -50V ~ -100V, the power is 1kW ~ 4kW, and the bias voltage is applied to the substrate during the deposition process, and the bias voltage is - 50V~-300V, the power is 1.5kW~2kW, the deposition temperature is 100~550℃, and the deposition time is 5~10min. N introduced during deposition 2 and CH 4 The flow ratio is 1:2~4.

[0050] Specifically, the target bias of the Ti arc target is -50V, the target power is 2kW, the substrate bias is -200V, an...

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Abstract

The invention discloses an orthodontic clamp with a PVD coating and a preparation method thereof. The orthodontic clamp comprises a clamp handle region, a joint region and a clamp mouth region. A titanium-containing compound coating is formed on the surface of a clamp mouth region base body by means of physical vapor deposition. The orthodontic clamp base body is made of stainless steel, then, thermal treatment is performed on the clamp mouth region of the orthodontic clamp again to achieve the high hardness, and then the physical vapor deposition method is used for plating the clamp mouth region with a high-hardness coating. The orthodontic clamp is made of stainless steel, and the anti-rust capability of a clamp body is higher compared with hard alloy in the prior art. Meanwhile, compared with the prior art, the preparation method has the advantages that no welding is needed, no nickel-containing substance needs to be introduced, no auxiliary material is needed, the orthodontic clampis more environmentally friendly and safer, the manufacturing technology is convenient to implement, and the production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to an orthodontic forceps with a PVD coating and a method for preparing the coating on the surface of the orthodontic forceps by physical vapor deposition (PVD) technology. Background technique [0002] Orthodontic pliers are tools designed for orthodontic treatment based on the principle of leverage. They consist of a pliers beak, a pliers joint and a pliers handle, and the whole can be made of stainless steel. The pliers beak can be made into different shapes according to the application, and the mechanical force acting on the pliers handle is transferred to the pliers beak through the pliers joint, so as to realize operations such as clamping, bending, cutting and removing archwires in orthodontic treatment. In order to avoid reducing the service life of the orthodontic forceps by cutting the edge, the hardness of the beak of the orthodontic forceps is required to...

Claims

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Application Information

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IPC IPC(8): C23C14/06C21D1/26C21D1/18C23C14/32A61C7/04
CPCA61C7/04C21D1/18C21D1/26C23C14/0021C23C14/0635C23C14/0641C23C14/0664C23C14/325
Inventor 陈建文
Owner 金华新亚机械制造有限公司
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