0315-6985576

baoruitj@163.com

BAORUI TITANIUM EQUIPMENT

Reasons for abnormal color of vacuum heat treatment products of Baorui PVD equipment

2019-05-17 15:55  Times of view:

Vacuum furnace is the mainstream equipment in the heat treatment industry. The processed products are not only reliable in quality, but also environmentally friendly, pollution-free, no need for three-waste treatment, and energy consumption is significantly lower than traditional heat treatment equipment such as salt bath furnaces; therefore, it is widely used in aviation. Aerospace, weapons, electronics, automotive, machinery and other fields. However, it is often seen that vacuum furnace users post on the Internet to inquire about the wrong color of the heat treatment of the vacuum furnace. This problem is a common problem in heat treatment production. So, what is the cause of this problem?

1544235139686325.jpg

Vacuum Coating Machine,pvd coating machine,pvd vacuum machine,vacuum ion coating machine,multi-arc ion coating machine

1. Check if the vacuum furnace equipment itself has air leakage.

This can be determined by the pressure rise rate index of the vacuum furnace; it is necessary to remind everyone that when testing the pressure rise rate, it must be tested after the oven is cooled down to room temperature, and the vacuum can not be opened after opening the furnace door. carry out testing.

2. Check if there is any air leakage in the intake pipe of the vacuum furnace.

Sometimes the pressure rise rate of our test vacuum furnace shows normal, but there is leakage in the intake pipe or valve of the vacuum furnace. The pressure in the intake pipe is gradient. The closer to the end of the furnace, the more negative pressure. This is one of the reasons why the color of the products processed by the vacuum furnace is not correct.

3. The purity of the inert gas introduced into the vacuum furnace equipment is not high.

Tool coating machine,Target

vacuum coating machine,pvd coating machine,pvd vacuum machine,vacuum ion coating machine,multi-arc ion coating machine

When the purity of the inert gas is insufficient, the oxygen mixed in the product causes oxidation and decarburization of the product, which leads to discoloration of the product. The purity of the test gas can be directly detected or compared by other equipment to conclude.

4. The moisture in the vacuum furnace equipment is attached to the inner wall of the vacuum furnace or the heat exchanger.

This kind of moisture is difficult to discharge through the oven. When the vacuum furnace equipment does not have the above three problems, the color of the processed product is still wrong. This is mostly caused by this reason; After the furnace equipment is raised to a high temperature, the heating is stopped, and then a high-purity inert gas is introduced into the furnace, and then the fan circulation system is started, and the high temperature and hot air in the vacuum furnace are used to adhere the moisture on the inner wall of the vacuum furnace and the heat exchanger. Bake it out to solve this problem.

5, the reason for quenching oil

Evaporation source,Diffusion pump

vacuum coating machine,pvd coating machine,pvd vacuum machine,vacuum ion coating machine,multi-arc ion coating machine

In practice, the author found that a large part of the color is not bright after vacuum oil quenching is due to improper selection of quenching oil.

service hotline

0315-6985576

Wechat Service

Contact us
Top