TY JOUR TI CARBON MASS TRANSFER REGULARITIES AT CASE-HARDENING IN LOW-PRESSURE ATMOSPHERE AND BOUNDARY CONDITIONS OF SIMULATOR KW diffusion KW mass transfer KW case-hardening KW boundary conditions KW simulator KW hydrocarbon media JO Bulletin of Bryansk state technical university AU Ryzhova , M.. AU Demidov , P.. AU Semenov , M.. AU Korolev , I.. PY 2016 IS 2016 PB Bryansk State Technical University