The invention discloses a manufacture method for a seamless
steel tube. The method is used for manufacture of
austenite type free-
cutting wear resistant stainless steel. The method comprises the following steps: 1) carrying a primary
pickling for a blank material; 2) carrying out
grinding, rolling-drawing combination, oil removing for the pickled blank material; 3) determining whether the resulting material meets the requirements of the finished product, wherein the resulting material is subjected to an
intermediate product solid solution heat treatment, straightening and
pickling, and the step 2) is repeatedly performed if the resulting material does not meet the requirements of the finished product; 4) carrying out a finished product
solid solution heat treatment, straightening and fixed finished product
cutting if the resulting material meets the requirements of the finished product; 5) carrying out
pickling for the finished product. The temperature of the
intermediate product solution heat treatment and the temperature of the finished product
solid solution heat treatment are 1010-1150 DEG C, and a rapid cooling treatment is performed after the
intermediate product solution heat treatment or the finished product
solid solution heat treatment is performed, wherein the temperature of the intermediate product solution heat treatment is 1040-1150 DEG C, and the temperature of the finished product
solid solution heat treatment is 1020-1100 DEG C. According to the present invention, the seamless
steel tube manufacture method with characteristics of energy saving and simple process is provided; the technical problems in the prior art are solved; the yield and the whole product quality are improved, and especially the surface quality is improved, wherein the tensile strength Rm is more than or equal to 540 Mpa, the stipulated non-proportional extension strength Rp0.2 is more than or equal to 240 Mpa, the elongation at break A is more than or equal to 40%, and the rockwell
hardness HRB is less than or equal to 90; the
smooth surface can be achieve after pickling so as to provide the organization preparation for the next process, wherein the
surface roughness Ra is less than or equal to 1.00 mum.