Stainless steel structure, material control and new steel type technology

SUS304 has excellent balance characteristics such as excellent corrosion resistance, heat resistance and workability, and the equilibrium state of FeCr8% Ni alloy corresponding to SUS3o4. By the name of austenitic stainless steel, you may feel that the primary crystal is ferrite, but the solidification form of 18% Cr SUS304 is the so-called FA method after the ferrite (sometimes called 8 ferrite) solidifies , Forming austenite. The advantage is that the use of ferrite that remains during solidification makes it difficult to cause solidification cracks during continuous casting and welding. Austenite grain boundaries are prone to embrittlement due to s, while ferrite has a role of fixing S due to the large solid solubility of S. As a result, the austenite grain boundaries can be purified and strengthened. In the production process of stainless steel plates, the composition is generally adjusted according to the following principles, so that a small amount of ferrite remaining during continuous casting is dissolved in single-phase austenite during hot rolling and heating.

In order to design materials with excellent processing performance, the material organization must be controlled according to the processing method. The convexity of the belly can be improved by TRIP as described above, but the deep drawability and flange elongation tend to decrease due to the large amount of processed martensite formed. Especially in the case of multiple deep drawing, the hardening of the flange portion tends to hinder the deep drawing workability of the process. Seamless steel pipe price, Tianjin seamless steel pipe, oil casing, 12cr1mov, seamless steel pipe price, precision seamless steel pipe, 16mn seamless steel pipe, 15CrMo alloy pipe, q345b seamless pipe, q345B seamless steel pipe, Tianjin 27SiMn steel pipe, pipeline Pipe, 35crmo steel pipe, 12cr1mov alloy pipe, high pressure alloy pipe, Chongqing seamless steel pipe, bearing steel pipe, alloy pipe, Shandong steel pipe, precision seamless steel pipe, Tianjin seamless pipe, 15crmo steel pipe, Tianjin square pipe price, oil casing, high pressure Alloy tube.

In order to satisfy such material characteristics, by adjusting the low yield strength, the amount of work induced martensite and the work hardening of austenite, an extremely soft high-workability austenitic stainless steel plate (17Cr8Ni2.7Cu2.7Mn was developed Low C, N). In order to reduce the yield strength, the new refining technology is adopted to reduce the content of c and N which make the austenite solid solution strengthened. Compared with the normal SUS304 (8Ni), it suppresses the formation of martensite induced by processing, so that the stability of austenite is the same as that of 18Cr9Ni steel. In addition, in order to adjust the work hardening of austenite, the addition amount of Ni, Mn, and cu should be optimized. The secondary workability can be maximized by optimizing the combination of TRIP produced by processing induced martensite and the work hardening of austenite itself.