> For the complete documentation index, see [llms.txt](https://dante-solutions-inc.gitbook.io/dante-6.3-help-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dante-solutions-inc.gitbook.io/dante-6.3-help-documentation/introduction-2/vcarb.md). # VCarb
The VCarb utility can be used to design the Boost/Diffuse schedule for a low pressure carburization process, or predict the as-quenched hardness and carbon profile based on a recipe. This tool can account for both curved and flat surfaces. The user can define either an inner radius or outer radius and length for the carburizing surface. For the prediction analysis type, the user can define a carburizing recipe, while for a process design analysis type, the user can define various parameters such as case depth in order to generate a reasonable recipe. ## Use Case To design a low pressure carburization recipe using the Process Design Analysis Type, first select the material that you are trying to design for. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-813b7b04d2ad45e32f7fae94a8d8056ba2e20ccd%2FProcess_Design_Material.png?alt=media) Next, define the type and dimension of the surface under the geometry tab. In this case, we will set Part Geometry Type as Inner Radius and set the Part Radius to 50 mm. The Load Surface Area and Model Thickness does not affect the diffusion process but will be used to calculate the volumetric flow. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-69b22cd1f17176d7f9a056e1e33c3e63aa4a70b0%2FProcess_Design_Geometry.png?alt=media) The last thing we will have to do is design the process parameters. By adjusting the parameters, the VCarb utility tool will slightly alter the recipe to account the change. For the first analysis, we are trying to achieve a 0.35% carbon at an effective case depth of 1.0 mm. We also want to make sure the final carbon on the surface does not exceed 0.80%. The depth monitor point controls how much carbon can be present at the point defined. The carbon at that point cannot exceed the upper carbon and or cannot be less than the lower carbon bound. This is a way to control the carbides formed during the process. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-2b660796c841e8db271e1511daa747fa3742445e%2FProcess_Design_Plot.png?alt=media) ``` B/D#, B/D-TIME(s), B/D-TEMP(C), GAS_P(miliBar), B/D_TYPE, C2H2-Flow(L/s) 1, 190.00, 925.00, 1.50, Boost, 0.498E-01 2, 310.00, 925.00, 0.00, Diffuse, 0.000E+00 3, 80.00, 925.00, 1.50, Boost, 0.461E-01 4, 495.00, 925.00, 0.00, Diffuse, 0.000E+00 5, 70.00, 925.00, 1.50, Boost, 0.478E-01 6, 650.00, 925.00, 0.00, Diffuse, 0.000E+00 7, 70.00, 925.00, 1.50, Boost, 0.473E-01 8, 875.00, 925.00, 0.00, Diffuse, 0.000E+00 9, 70.00, 925.00, 1.50, Boost, 0.474E-01 10, 1050.00, 925.00, 0.00, Diffuse, 0.000E+00 11, 65.00, 925.00, 1.50, Boost, 0.487E-01 12, 1155.00, 925.00, 0.00, Diffuse, 0.000E+00 13, 65.00, 925.00, 1.50, Boost, 0.482E-01 14, 1405.00, 925.00, 0.00, Diffuse, 0.000E+00 15, 65.00, 925.00, 1.50, Boost, 0.484E-01 16, 1545.00, 925.00, 0.00, Diffuse, 0.000E+00 17, 65.00, 925.00, 1.50, Boost, 0.482E-01 18, 1860.00, 925.00, 0.00, Diffuse, 0.000E+00 19, 65.00, 925.00, 1.50, Boost, 0.486E-01 20, 2045.00, 925.00, 0.00, Diffuse, 0.000E+00 21, 65.00, 925.00, 1.50, Boost, 0.486E-01 22, 2045.00, 925.00, 0.00, Diffuse, 0.000E+00 23, 65.00, 925.00, 1.50, Boost, 0.482E-01 24, 2485.00, 925.00, 0.00, Diffuse, 0.000E+00 25, 65.00, 925.00, 1.50, Boost, 0.485E-01 26, 2485.00, 925.00, 0.00, Diffuse, 0.000E+00 27, 65.00, 925.00, 1.50, Boost, 0.483E-01 28, 2725.00, 925.00, 0.00, Diffuse, 0.000E+00 29, 65.00, 925.00, 1.50, Boost, 0.482E-01 30, 650.00, 925.00, 0.00, Diffuse, 0.000E+00 ``` If we want to design for a slightly deeper case depth, we can change the Effective Case Depth value. In this analysis, we will use an Effective Case Depth of 1.2 mm. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-6837e0b0f50e1de8cb0a7357682a81bc9f4b55c1%2FProcess_Design_Controls_2.png?alt=media) Although the case depth is not exactly at 1.2 mm, the utility tool was able to account for the slightly deeper case depth. ![](https://3062023715-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F0UQEr9tolIKQwZXdPc9a%2Fuploads%2Fgit-blob-f302cdfa6de7730febeec5f274684b6f5a0c1e03%2FProcess_Design_Plot_2.png?alt=media) ``` ** B/D#, B/D-TIME(s), B/D-TEMP(C), GAS_P(miliBar), B/D_TYPE, C2H2-Flow(L/s) 1, 190.00, 925.00, 1.50, Boost, 0.498E-01 2, 310.00, 925.00, 0.00, Diffuse, 0.000E+00 3, 80.00, 925.00, 1.50, Boost, 0.461E-01 4, 495.00, 925.00, 0.00, Diffuse, 0.000E+00 5, 70.00, 925.00, 1.50, Boost, 0.478E-01 6, 650.00, 925.00, 0.00, Diffuse, 0.000E+00 7, 70.00, 925.00, 1.50, Boost, 0.473E-01 8, 875.00, 925.00, 0.00, Diffuse, 0.000E+00 9, 70.00, 925.00, 1.50, Boost, 0.474E-01 10, 1050.00, 925.00, 0.00, Diffuse, 0.000E+00 11, 65.00, 925.00, 1.50, Boost, 0.487E-01 12, 1155.00, 925.00, 0.00, Diffuse, 0.000E+00 13, 65.00, 925.00, 1.50, Boost, 0.482E-01 14, 1405.00, 925.00, 0.00, Diffuse, 0.000E+00 15, 65.00, 925.00, 1.50, Boost, 0.484E-01 16, 1545.00, 925.00, 0.00, Diffuse, 0.000E+00 17, 65.00, 925.00, 1.50, Boost, 0.482E-01 18, 1860.00, 925.00, 0.00, Diffuse, 0.000E+00 19, 65.00, 925.00, 1.50, Boost, 0.486E-01 20, 2045.00, 925.00, 0.00, Diffuse, 0.000E+00 21, 65.00, 925.00, 1.50, Boost, 0.486E-01 22, 2045.00, 925.00, 0.00, Diffuse, 0.000E+00 23, 65.00, 925.00, 1.50, Boost, 0.482E-01 24, 2485.00, 925.00, 0.00, Diffuse, 0.000E+00 25, 65.00, 925.00, 1.50, Boost, 0.485E-01 26, 2485.00, 925.00, 0.00, Diffuse, 0.000E+00 27, 65.00, 925.00, 1.50, Boost, 0.483E-01 28, 2725.00, 925.00, 0.00, Diffuse, 0.000E+00 29, 65.00, 925.00, 1.50, Boost, 0.482E-01 30, 3005.00, 925.00, 0.00, Diffuse, 0.000E+00 31, 65.00, 925.00, 1.50, Boost, 0.483E-01 32, 3305.00, 925.00, 0.00, Diffuse, 0.000E+00 33, 65.00, 925.00, 1.50, Boost, 0.485E-01 34, 3305.00, 925.00, 0.00, Diffuse, 0.000E+00 35, 65.00, 925.00, 1.50, Boost, 0.483E-01 36, 3635.00, 925.00, 0.00, Diffuse, 0.000E+00 37, 65.00, 925.00, 1.50, Boost, 0.484E-01 38, 650.00, 925.00, 0.00, Diffuse, 0.000E+00 ```