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Austenitic stainless steel and its hardening method

A technology for austenitic stainless steel and activation treatment, which is applied in the direction of solid-state diffusion coating, vacuum evaporation coating, coating, etc., can solve the problems of unsatisfactory hardening treatment effect of austenitic stainless steel, and achieve improved scratching ability and improved The effect of surface hardness

Active Publication Date: 2019-10-29
TIAN WANG ELECTRONICS (SHENZHEN) CO LTD
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Problems solved by technology

[0005] The purpose of the present invention is to provide an austenitic stainless steel and its hardening method, aiming to solve the technical problem that the hardening treatment effect of the existing austenitic stainless steel is not ideal

Method used

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Examples

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Effect test

Embodiment 1

[0033] A method for hardening an austenitic stainless steel that does not reduce antirust performance, comprising the steps of:

[0034] The first step is helium bombardment. The specific process is: while heating the initial material of austenitic stainless steel in the furnace, vacuumize; when the temperature reaches 200°C, the vacuum is pumped to 1-5Pa, and the cathode voltage is adjusted to 400-450V, continuous injection of helium for 5 minutes.

[0035] The second step is ion nitriding. The specific process is: after a short-term bombardment with helium, keep the vacuum at 1-5Pa, continue to heat up to 250°C and start injecting hydrogen; continue to heat up, when the temperature reaches 320°C-350°C , adjust the vacuum to 5-10Pa, adjust the cathode voltage to 500-550V, inject nitrogen, keep warm for 3-4 hours, and finally form a layer of 20-30μm thick and 700-900Hv hardness on the surface of the initial austenitic stainless steel material Nitriding layer (that is, metal s...

Embodiment 2

[0040] An austenitic stainless steel, which is obtained by hardening the initial material of the austenitic stainless steel in the above-mentioned embodiment 1.

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Abstract

The invention belongs to the technical field of material hardening and particularly relates to austenitic stainless steel and a hardening method thereof. The hardening method of the austenitic stainless steel comprises the following steps of providing an austenitic stainless steel initial material; conducting helium bombardment treatment on the surface of the austenitic stainless steel initial material, and conducting nitriding treatment at the temperature less than or equal to 350 DEG C to form a nitriding layer on the surface of the austenitic stainless steel initial material; and conductingpolishing and activating treatment on the surface of the austenitic stainless steel initial material with the formed nitriding layer in sequence and then plating a chromium-titanium film on the nitriding layer. Through the hardening method, the inherent anti-rust performance of the austenitic stainless steel cannot be reduced, and the surface hardness of the austenitic stainless steel can be further improved; and accordingly, the surface of the austenitic stainless steel has wear resistance, and the anti-friction and anti-scratch capability is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of material hardening, and in particular relates to an austenitic stainless steel and a hardening method thereof. Background technique [0002] Austenitic stainless steel refers to stainless steel with austenitic structure at room temperature. Due to its comprehensive and good comprehensive properties, austenitic stainless steel has been widely used in various industries. Austenitic stainless steel is non-magnetic and has high toughness and plasticity, but its strength is low, and it is generally impossible to strengthen it through phase transformation. [0003] Watch parts such as watch bases and straps are generally made of austenitic stainless steel due to the requirement of excellent anti-rust performance. However, due to the low hardness of austenitic stainless steel, defects such as scratches and scratches are prone to occur. Because the structure of austenitic stainless steel is austenite, it cannot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/38C23C8/02C23C8/80C23C14/16
Inventor 张克来林育周罗建东
Owner TIAN WANG ELECTRONICS (SHENZHEN) CO LTD
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