Ferritic stainless steel and its welding characteristics
排烟罩通风管道加工铁素体不锈钢分为一般铁素体不锈钢和超纯铁素体不锈钢两大类，其间一般铁素体不锈钢有Cr12 ~ Cr14型，如00Cr12、0Cr13Al；Cr16 ~ Cr18型，如1Cr17Mo；Cr25 ~ 30型。
Ferritic stainless steel is divided into ordinary ferritic stainless steel and ultra pure ferritic stainless steel two categories, including ordinary ferritic stainless steel is Cr12 ~ Cr14, such as 00Cr12, 0Cr13Al; Cr16 ~ Cr18, 1Cr17Mo ~ Cr25; type 30.
因为一般铁索体不锈钢中的碳、氮含量较高，故加工成形及焊接都较困难，耐蚀性也难以确保，运用受到限制，在超纯铁素体不锈钢中严格控制了钢中的碳和氮总量，一般控制在0.035％ ~ 0.045％、0.030％、0.010％ ~ 0.015％三个层次，一起还加进必要的合金元素以进一步进步钢的耐腐蚀性和归纳功能。
The carbon and nitrogen content of ordinary ferritic stainless steels is higher, so the forming and welding are more difficult, it is difficult to ensure the corrosion resistance, the use is restricted, in the ultra pure ferritic stainless steel in the strict control of the total amount of carbon and nitrogen in steel, general control in three levels, 0.045% 0.035%~ 0.030%, 0.010%~ 0.015%. At the same time also added alloy elements necessary to further improve the corrosion resistance of steel and comprehensive performance.
The welding under high temperature, heat affected zone reached above 1000 degrees in temperature especially in grain seam will rapidly grow, even rapid cooling after welding, can avoid corrosion caused by grain coarsening of the sharp decrease of the toughness and high intergranular.
The content of chromium in ferritic steel is higher, and the harmful elements such as carbon, nitrogen and oxygen are also higher. The brittleness transition temperature is higher, and the notch sensitivity is stronger. Therefore, the phenomenon of embrittlement after welding is serious.
③ 在400℃ ~ 600℃长期加热缓冷时，排烟罩会出现475℃脆化，使常温耐性严峻下降。在550℃ ~ 820℃长期加热后，则轻易从铁素体中析出σ相，也显着降低其塑、耐性。
When 400 degrees C ~ 600 C is heated and cooled for a long time, embrittlement at 475 degrees will occur, which leads to a severe decrease in the toughness at room temperature. After heating at 550 ~ 820 C for a long time, it is easy to separate the phase from ferrite and reduce its plasticity and toughness.
1. What are the components of the automatic walking beveling machine?
2. Where does the power of automatic walking come from?
3, automatic walking groove power transmission protection?
4, my plate slightly radian, the ground slightly uneven, can be processed?
5, the processing effect?
6, how about processing cars?
7, how about the processing cost?
8, whether there is noise processing?
9, my plate requires the upper and lower sides, inverted groove, turn over the board is very troublesome, how to process the fastest?