2.5*300mm手工焊条

电焊条铬不锈钢焊条是不锈钢焊条的一种， 具有一定的耐蚀(氧化性酸、有机酸、气蚀)耐热和耐蚀性能。通常被选作电站、化工、石油等设备材料。但铬不锈钢一般情况下可焊性较差，应注意焊接工艺、热处理条件及选用合适的电焊条。

　　1、马氏体不锈钢的焊接：

　　马氏体不锈钢包括含铬5~9%的中铬钢和含铬12%的高铬钢。此类钢淬硬倾向大，焊后易产生高硬度的马氏体和贝氏体使脆性增加，残余应力也较大，容易产生冷裂缝。故一般焊前必须进行预热及层间保温，焊后尚未冷却前进行高温回火。

　　2、铬13不锈钢的焊接：

　　此类铬钢焊接后硬化性较大，容易产生裂纹，若采用同类的铬不锈钢焊条(CHK202、CHK207)焊接，则必须进行300℃以上的预热和焊后700℃左右的回火缓冷处理。若焊件不能进行焊后处理，则应用铬不锈钢焊条(CHS107、CHS207)等焊接。

　　3、铬17不锈钢的焊接：

　　此类铬钢通常为改善耐蚀性及可焊性而加适量的稳定化元素钛、铌、钼，可焊性较铬13钢为好，可采用同类型的铬不锈纲焊条(CHK302、CHK307)焊接。焊前，焊件应进行200℃左右预热，焊后进行800℃左右的回火处理。也可采用铬镍不锈钢焊条(如CHS107、CHS207)，焊后不进行热处理。

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电焊条

Chromium stainless steel electrode wire is a kind of stainless steel electrode, has some of the corrosion resistant (oxidizing acid, organic acids, cavitation) heat resistant and corrosion resistant performance. Usually was chosen for power station, chemical, petroleum and other equipment materials. But chromium stainless steel usually solderability poorer, should pay attention to welding technology, heat treatment condition and the choice of appropriate welding wire.

1, martensite stainless steel welding:

Chromium martensitic stainless steel contains five to 9% of the chrome and chromium-contained 12% of high chrome. This kind of steel hardened tendency after welding, easy to produce high hardness of martensite and bainite make brittle increase, residual stress is larger also, easy to produce the cold crack. So generally should be preheated before welding between layers and the heat preservation, has not yet been cooling after welding of high temperature before firing back.

2, chromium stainless steel welding: 13

Such chrome after welding sclerosing bigger, is easy to crack, if you use the same kind of chromium stainless steel electrode (CHK202, CHK207), welding, they must be more than 300 ℃ and 700 ℃ preheated after welding of tempering about slow cold treatment. If can not carry out welding welding post-processing, apply chromium stainless steel electrode (CHS107, CHS207) welding.

3, chromium and stainless steel welding:

Such chrome usually to improve corrosion resistance and weldability and suitable addition of stabilization element titanium, niobium, molybdenum, solderability is chrome steel for good, 13 can use the same type of chromium stainless outline electrode (CHK302, CHK307) welding. Before welding, welding shall be carried out to about 200 ℃ preheated 800 ℃ after welding, the tempering treatment around. Also can use nickel chrome stainless steel electrode (such as CHS107, CHS207), welding not heat treatment.

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Welding wire