Abstract:
This research investigates the application of material engineering techniques on Stainless
steel SUS 630 so that it not only has good resilience and resistance to corrosive
properties but also has hard properties on its surface. In an effort to improve the quality
of violence on the surface, among others, by surface hardening technique, one of which is
a heat treatment technique by adding nitrogen elements to the surface of a material
called the nitriding pack process. The nitrogen source in the pack nitriding process
comes from urea (CO(NH2)2) with a nitrogen content of 46%. Parameters for controlling
this study using variables by applying temperature variations (420
0
C, 470
0
C, 520
0
C,
0
570
C, 620
0
C) and cooling media (inside the furnace, room temperature, and with fan)
with a holding time of 2 hours. To evaluate this study microstructure testing, diffusion
layer testing and micro hardness testing were carried out. From the results of the test it
was found that there was no significant transformation of the microstructure shape when
comparing with raw material, the optimal value of diffusion layer was in the cooling
furnace with a temperature of 620
0
C with an average of 4.57 μm and white layer 0.53
𝜇𝑚, the highest hardness was at 620
0
C with cooling in furnace media which has a value
of 80.9 HRN.
