A Controlled Cooling Method for 82b Wire Rod with Small Size and High Cr After Rolling
A technology of controlled cooling and small size, which is applied in metal rolling, temperature control, metal rolling, etc., and can solve problems such as the content cannot be too high, the critical cooling rate of martensite is reduced, and the fluctuation of mechanical properties of the abnormal structure of controlled cooling is difficult. , to achieve high strength, stable mass production, and uniformity
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Embodiment 1
[0024] In summer, a method of controlled cooling after rolling of a small-scale high-Cr 82B wire rod of the present invention: the method can control the spinning temperature after rolling, the cooling rate before the phase change, the phase change temperature range, the cooling rate in the phase change zone, and the cooling rate in the phase change zone. The combined control of the speed of the Telmore roller table, the air volume of the fan and the distribution of the air volume of Jialing is as follows:
[0025] 1.1), water cooling after final rolling to avoid grain coarsening, the spinning temperature is controlled at 870°C;
[0026]1.2) Stable spinning ring shape technology of the laying machine; when the laying machine is at high speed, when the finished product speed of the finishing mill or the sizing mill is V≥90m / s, there will generally be an unstable shape of the spinning ring, such as spinning Chaotic, large and small circles, the running track of the spinning oute...
Embodiment 2
[0037] In winter, a method of controlled cooling after rolling of 82B wire rod with a small size and high Cr of the present invention, the method has a great influence on the spinning temperature after rolling, the cooling rate before the phase change, the phase change temperature range, the cooling rate in the phase change zone, and the cooling rate in the phase change zone. The combined control of the speed of the Telmore roller table, the air volume of the fan and the distribution of the air volume of Jialing is as follows:
[0038] 1.1), water cooling after final rolling to avoid grain coarsening, and the spinning temperature is controlled at 860°C;
[0039] 1.2) Stable spinning ring shape technology of the laying machine; when the laying machine is at high speed, when the finished product speed of the finishing mill or the sizing mill is V≥90m / s, there will generally be an unstable shape of the spinning ring, such as spinning There are large and small circles, the running...
Embodiment 3
[0050] In spring and autumn, a kind of method of controlling cooling after rolling of the 82B wire rod of a kind of small size high Cr of the present invention, this method is to the spinning temperature after rolling, the cooling speed before the phase change, the phase change temperature interval, the cooling rate of the phase change zone, Stelmore roller table speed, fan air volume and Carling air volume distribution are controlled in combination, as follows:
[0051] 1.1), water cooling after final rolling to avoid grain coarsening, the spinning temperature is controlled at 880°C;
[0052] 1.2) Stable spinning ring shape technology of the laying machine; when the laying machine is at high speed, when the finished product speed of the finishing mill or the sizing mill is V≥90m / s, there will generally be an unstable shape of the spinning ring, such as spinning There are large and small circles, the running track of the spinning outer circle no longer runs in a straight line,...
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Abstract
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