Can the hardness of stainless steel 316 go up after nitriding by glow ions?

Of course, it can be nitrided, but stainless steel nitriding is slower. In addition, the hardness of the 316 stainless steel material matrix is low, and your nitriding layer is thin, so it is absolutely impossible to use the Rockwell test, which will easily press through the permeable layer, and the actual measurement is the hardness of the matrix. A Vickers hardness tester must be used.

Rust steel: The hardness varies greatly, and the hardness of precipitation hardened stainless steel can exceed HV500 at a maximum, but the hardness is relatively low. Titanium nitride, hardness up to HV1994, tungsten carbide HV2200, titanium carbide up to HV2850 3200; Generally speaking, the higher the hardness, the better the wear resistance.

But also pay attention to their brittleness.

This can not simply use the Rockwell hardness tester to beat the hardness, to use the Vickers hardness tester to convert to Rockwell, Rockwell 60 degrees is equivalent to about 710 HV, the Rockwell load is relatively large, has passed through the hardened layer, so the hardness is between the hardened layer and the matrix, and the measurement results are much lower than the actual hardening value.

If you have a Rockwell hardness tester in your factory, why don't you hit Brinell hardness (HRB), and then convert it.

Just adjust the force of the hardness tester to achieve this.

The analysis should be: it is correct not to be able to test the Rockwell hardness with Vickers hardness. Inspect with a general file (62 degrees) and you're good to go!

304 stainless steelBelongsAustenitic stainless steelThe nitriding process is generally divided into two categories, one is nitriding at room temperature (nitriding temperature is about 520), and the depth of nitriding jujube layer is generally about that; The other is low-temperature nitriding (the nitriding temperature is about 430), and the nitride layer depth is generally about that.

Nitriding treatment requirements specify:

1. The parts to be ionized nitriding must be thoroughly cleaned to avoid arcing and damage to parts due to oil, rust spots, volatiles, etc. When the parts are loaded into the furnace, the gap must be large and uniform enough, and the temperature is often too high due to over-dense loading.

2. The nitriding medium is ammonia or pre-stool trembling nitrogen-hydrogen mixed gas. Ion nitriding operation is strict, otherwise it is easy to lead to uneven overflow and arc discharge.

3. For locally nitrided parts, the non-permeable part can be shielded with an outer cover (for the protruding surface) or a plug (for the concave surface or hole) to avoid glittering there. When installing the furnace, it is also necessary to pay attention to the reasonable distribution of temperature measurement and monitoring thermocouples.

Summary. The purpose of stainless steel solution treatment: the purpose of stainless steel solution treatment is mainly to heat the workpiece to the high-temperature austenite area, and after quenching, the second phase structure has no time to precipitate, so as to obtain a single-phase austenite structure with good plasticity.

Grain coarseness, mainly related to the maximum heating temperature and heating time, especially the heating temperature, has the greatest impact on grain growth, therefore, the possibility of grain growth exists. As for the reduction of strength and hardness, it is mainly related to the properties of austenite structure: austenite, like ferrite, is a structure with good plasticity, and after solution treatment, the plasticity of stainless steel increases, and its strength and hardness are naturally reduced.

Hello, dear, the solution hardness of stainless steel will become soft after nitriding.

The purpose of stainless steel solution treatment: the purpose of stainless steel solution treatment is mainly to heat the workpiece to the high-temperature austenite area, and after quenching, the second phase structure has no time to precipitate, so as to obtain a single-phase austenite structure with good plasticity. Grain coarseness, mainly related to the maximum heating temperature and heating time, especially the heating temperature, has the greatest impact on grain growth, therefore, the possibility of grain growth exists.

As for the reduction of strength and hardness, it is mainly related to the properties of austenite structure: austenite, like ferrite, is a structure with good plasticity, and after solution treatment, the plasticity of stainless steel increases, and its strength and hardness are naturally reduced.