A method for low-pressure carburizing of a workpiece comprising steel, said steel comprising, in weight percent: - from 0.10% to 0.20% in carbon, - from 0.1% to 20% in cobalt, - from 2% to 15% in nickel, - from 1% to 10% in chromium, characterized in that said method comprises: a) a step of placing said workpiece in a carburizing enclosure, the pressure in the carburizing enclosure is between 200 Pa and 2500 Pa, and b) implementing between 1 to 30 consecutive carburizing cycles (C1, C2, C3, C4), each cycle (C1, C2, C3, C4) comprising: i) a step of injecting carburizing gas selected from propane C3H8 and acetylene C2H2 into the carburizing enclosure at a pressure between 10 000 Pa and 300 000 Pa, so as to enrich the surface of the workpiece with carbon and to increase the surface rate of carbon of the workpiece up to a predetermined higher surface rate, the carburizing gas being injected into the enclosure at a flow rate of between 2,778×10 -4 Nm 3 /s and 8,333×10 -4 Nm 3 /s, the temperature of the enclosure being between 950°C and 1050°C, and for a period of time t 1 of between 30 and 250s, and ii) a step of injecting a neutral gas selected from dinitrogen N2 and argon Ar into the carburizing enclosure at a pressure between 10 000 Pa and 700 000 Pa, so as to diffuse the carbon from the surface to the interior of the workpiece, and to decrease the surface rate of carbon of the workpiece to a predetermined lower surface rate, the neutral gas injection step comprising a first phase of neutral gas injection, at a flow rate of between 2,778×10 -4 Nm 3 /s and 2,778×10 -3 Nm 3 /s, and for a period of time t 2 of between 5 and 60s, followed by a second phase of neutral gas injection, at a flow rate of between 1,389×10 -4 Nm 3 /s and 8,333×10 -4 Nm 3 /s, and for a period of time t 3 of between 10 and 2000s. - from 0.10% to 0.20% in carbon, - from 0.1% to 20% in cobalt, - from 2% to 15% in nickel, - from 1% to 10% in chromium, a) a step of placing said workpiece in a carburizing enclosure, the pressure in the carburizing enclosure is between 200 Pa and 2500 Pa, and b) implementing between 1 to 30 consecutive carburizing cycles (C1, C2, C3, C4), each cycle (C1, C2, C3, C4) comprising: i) a step of injecting carburizing gas selected from propane C3H8 and acetylene C2H2 into the carburizing enclosure at a pressure between 10 000 Pa and 300 000 Pa, so as to enrich the surface of the workpiece with carbon and to increase the surface rate of carbon of the workpiece up to a predetermined higher surface rate, the carburizing gas being injected into the enclosure at a flow rate of between 2,778×10 -4 Nm 3 /s and 8,333×10 -4 Nm 3 /s, the temperature of the enclosure being between 950°C and 1050°C, and for a period of time t 1 of between 30 and 250s, and ii) a step of injecting a neutral gas selected from dinitrogen N2 and argon Ar into the carburizing enclosure at a pressure between 10 000 Pa and 700 000 Pa, so as to diffuse the carbon from the surface to the interior of the workpiece, and to decrease the surface rate of carbon of the workpiece to a predetermined lower surface rate, the neutral gas injection step comprising a first phase of neutral gas injection, at a flow rate of between 2,778×10 -4 Nm 3 /s and 2,778×10 -3 Nm 3 /s, and for a period of time t 2 of between 5 and 60s, followed by a second phase of neutral gas injection, at a flow rate of between 1,389×10 -4 Nm 3 /s and 8,333×10 -4 Nm 3 /s, and for a period of time t 3 of between 10 and 2000s. i) a step of injecting carburizing gas selected from propane C3H8 and acetylene C2H2 into the carburizing enclosure at a pressure between 10 000 Pa and 300 000 Pa, so as to enrich the surface of the workpiece with carbon and to increase the surface rate of carbon of the workpiece up to a predetermined higher surface rate, the carburizing gas being injected into the enclosure at a flow rate of between 2,778×10 -4 Nm 3 /s and 8,333×10 -4 Nm 3 /s, the temperature of the enclosure being between 950°C and 1050°C, and for a period of time t 1 of between 30 and 250s, and ii) a step of injecting a neutral gas selected from dinitrogen N2 and argon Ar into the carburizing enclosure at a pressure between 10 000 Pa and 700 000 Pa, so as to diffuse the carbon from the surface to the interior of the workpiece, and to decrease the surface rate of carbon of the workpiece to a predetermined lower surface rate, the neutral gas injection step comprising a first phase of neutral gas injection, at a flow rate of between 2,778×10 -4 Nm 3 /s and 2,778×10 -3 Nm 3 /s, and for a period of time t 2 of between 5 and 60s, followed by a second phase of neutral gas injection, at a flow rate of between 1,389×10 -4 Nm 3 /s and 8,333×10 -4 Nm 3 /s, and for a period of time t 3 of between 10 and 2000s.