Low-temperature high-strength-and-ductility high manganese steel, and high manganese steel plate and high manganese steel tube manufacturing process

A machining technology of the low-temperature high-strength-ductility high manganese steel plate, comprising process steps of smelting high manganese steel, post-treating a steel ingot, and cogging and rolling to form a plate, wherein the process steps comprise the following parameters:

• A. smelting the high manganese steel:
• calculating a feeding ratio according to the percentage by weight of components in the high manganese steel:
• Mn 30%-36%, C 0.02%-0.06%, S≦0.01%, P≦0.008% and the balance being Fe, and smelting the components into the steel ingot;
• B. post-treating the steel ingot:
• keeping the steel ingot smelted in step A under the condition of 1150 DEG C.-1200 DEG C. and performing heat treatment for 2-4 hours, and then transferring the steel ingot into a water quenching tank at room temperature to complete solid solution treatment;
• and
• C. cogging and rolling the steel ingot to form a plate:
• performing hot rolling, tempering and homogenizing after cogging the steel ingot after solid solution treatment.

A machining technology of a low-temperature high-strength-ductility high manganese steel tubular product, comprising process steps of smelting high manganese steel, post-treating a steel ingot, and cogging and rolling to form a plate, wherein the process steps comprise the following parameters:

• step A. calculating a feeding ratio according to the percentage by weight of components in the high manganese steel:
• Mn 30%-36%, C 0.02%-0.06%, S≦0.01%, P≦0.008% and the balance being Fe, and smelting the components into the steel ingot;
• step B. post-treating the steel ingot:
• maintaining the steel ingot smelted in step A under the condition of 1150 DEG C.-1200 DEG C., performing heat treatment for 2-4 hours, and then transferring the steel ingot into the room temperature water quenching tank to complete solid solution treatment;
• and
• step C. cogging and drawing to obtain the tubular product:
• performing hot rolling, tempering and homogenizing on the steel ingot after cogging the steel ingot on which solid solution treatment is performed.