不銹鋼激光切割加工注意事項(xiàng)

不銹鋼激光切割在切割的過程中的注意事項(xiàng)：

 不銹鋼加工中有時(shí)候處理難以切割的位置，會(huì)使用切削技術(shù)進(jìn)行深加工，在切割的過程中，不銹鋼會(huì)表現(xiàn)出一些特征性的現(xiàn)象。

1.不銹鋼強(qiáng)度大易變形。不銹鋼在加工切削過程中，由于其有伸長率一定，特別是奧氏體不銹鋼，會(huì)產(chǎn)生較大的塑性變形，這就對切削加工產(chǎn)生了一定的難度。再者，不銹鋼自身的強(qiáng)度比較大，加大了切削過程中的雙項(xiàng)阻力，增強(qiáng)了切削力度。

2、鉻13不銹鋼焊后硬化性較大，容易產(chǎn)生裂紋。若采用同類型的鉻不銹鋼焊條（G202、G207）焊接，必須進(jìn)行300℃以上的預(yù)熱和焊后700℃左右的緩冷處理。若焊件不能進(jìn)行焊后熱處理，則應(yīng)選用鉻鎳不銹鋼焊條（A107、A207）。

3.不銹鋼切割溫度高。切削過程中會(huì)產(chǎn)生大量的熱量，但是不銹鋼材質(zhì)又是導(dǎo)熱系數(shù)比較差的，所以熱量全部集中到切割區(qū)和刀片上了，不易散熱。

4、鉻13不銹鋼焊后硬化性較大，容易產(chǎn)生裂紋。若采用同類型的鉻不銹鋼焊條（G202、G207）焊接，必須進(jìn)行300℃以上的預(yù)熱和焊后700℃左右的緩冷處理。若焊件不能進(jìn)行焊后熱處理，則應(yīng)選用鉻鎳不銹鋼焊條（A107、A207）。

5.切割難度大。不銹鋼是硬質(zhì)物質(zhì)，塑性好，韌性大，但是在加工的時(shí)候，切割由于不易折斷、易粘連而導(dǎo)致切割擠壓不銹鋼表面，導(dǎo)致刀具過度磨損（這是因?yàn)榈毒弋a(chǎn)生磨損，致使刀面產(chǎn)生坑洼，形成微小的剝落和缺口；加上不銹鋼中硬度很高，切削時(shí)直接與刀具接觸、摩擦，擦傷刀具，還有加工硬化現(xiàn)象，均會(huì)使刀具磨損加劇），從而不銹鋼表面加工惡化。

6.不銹鋼易膨脹。在切割加工過程中，會(huì)產(chǎn)生大量熱量，從而導(dǎo)致不銹鋼膨脹，加大了切割加工的難度。

7、焊條使用時(shí)應(yīng)保持干燥，鈦鈣型應(yīng)經(jīng)150℃干燥1小時(shí)，低氫型應(yīng)經(jīng)200-250℃干燥1小時(shí)（不能多次重復(fù)烘干，否則藥皮容易開裂剝落），防止焊條藥皮粘油及其它臟物，以免致使焊縫增加含碳量和影響焊件質(zhì)量。

8、鉻鎳不銹鋼焊條具有良好耐腐蝕性和抗氧化性，廣泛應(yīng)用于化工、化肥、石油、醫(yī)療機(jī)械制造。

9、鉻鎳不銹鋼焊接時(shí)，受到重復(fù)加熱析出碳化物，降低耐腐蝕性和力學(xué)性能。

10、鉻17不銹鋼，為改善耐蝕性能及焊接性而適當(dāng)增加適量穩(wěn)定性元素Ti、Nb、Mo等，焊接性較鉻13不銹鋼好一些。采用同類型的鉻不銹鋼焊條（G302、G307）時(shí)，應(yīng)進(jìn)行200℃以上的預(yù)熱和焊后800℃左右的回火處理。若焊件不能進(jìn)行熱處理，則應(yīng)選用鉻鎳不銹鋼焊條（A107、A207）。

12、鉻鎳不銹鋼藥皮有鈦鈣型和低氫型。鈦鈣型可用于交直流，但交流焊時(shí)熔深較淺，同時(shí)容易發(fā)紅，故盡可能采用直流電源。直徑4.0及以下可用于全位置焊件，5.0及以上用于平焊及平角焊。

13、為防止由于加熱而產(chǎn)生睛間腐蝕，焊接電流不宜太大，比碳鋼焊條較少20%左右，電弧不宜過長，層間快冷，以窄焊道為宜。 

   以上13點(diǎn)是我們在不銹鋼激光切割加工過程中經(jīng)常易出現(xiàn)的問題，當(dāng)然還有其他的一些現(xiàn)象沒有列舉出來，關(guān)于不銹鋼切割加工和如何巧加工不銹鋼的更多知識(shí)，請關(guān)注我們的網(wǎng)站（北京易德盛世科貿(mào)有限公司）我們是一家專業(yè)生產(chǎn)、設(shè)計(jì)、加工、安裝為一體的全能型不銹鋼綜合企業(yè)。

Stainless steel laser cutting in the cutting process of note:

 Stainless steel machining process sometimes difficult to cut position, the cutting technique is used for further processing, in the cutting process, the steel will exhibit some of the characteristics of the phenomenon.

A stainless steel strength deformation. Stainless steel machining cutting process, because it has a certain elongation, especially austenitic stainless steel, will produce large plastic deformation, which the cutting produced a certain degree of difficulty. Furthermore, the strength of the stainless steel itself is relatively large, the cutting process to increase the resistance of double entry, enhance the cutting efforts.

2, chrome 13 stainless steel after welding, hardening of large, prone to cracking. If you use the same type of chromium stainless steel electrode (G202, G207) welding, must be above 300 ℃ preheating and post-weld about 700 ℃ slow cooling process. If the weldment weld heat treatment is not possible, you should use chrome-nickel stainless steel electrode (A107, A207).

3 stainless steel cutting temperature is high. Cutting process will generate a lot of heat, but the stainless steel is a relatively poor thermal conductivity, so the heat is all focused to the cutting area and the blade, and easy to heat.

4, chrome 13 stainless steel after welding, hardening large, prone to cracking. If you use the same type of chromium stainless steel electrode (G202, G207) welding, must be above 300 ℃ preheating and post-weld about 700 ℃ slow cooling process. If the weldment weld heat treatment is not possible, you should use chrome-nickel stainless steel electrode (A107, A207).

5 cutting difficult. Stainless steel is a hard material, plastic, and toughness, but the processing time, cutting the difficult to break, easy adhesion and the resulting cut surface of stainless steel extrusion, resulting in excessive wear of the tool (which is generated due to wear of the tool, resulting in generating pits flank depression, forming tiny flakes and gaps; coupled with high hardness stainless steel, the cutting tool directly with the contact, friction, abrasion tool, as well as hardening will involve increased tool wear), thus worsening the stainless steel surface processing.

6 stainless steel easy expansion. In the cutting process, will generate a lot of heat, resulting in stainless steel expansion, increasing the difficulty of cutting.

7, the electrode should be used to keep dry, titanium calcium type should be dried at 150 ℃ for 1 hour, low hydrogen type shall be approved by 200-250 ℃ dried for 1 hour (not repeated drying, easy to crack and peel off the skin or drugs) to prevent the electrode medicated skin sticky oil and other dirt in order to avoid causing increasing carbon content and impact of the weld weldment quality.

8, chrome-nickel stainless steel electrodes with good corrosion resistance and oxidation resistance, widely used in chemical, fertilizer, petroleum, medical machinery.

9, chrome-nickel stainless steel welded when subjected to repeated heating carbide precipitation, reduce corrosion resistance and mechanical properties.

10, 17 chromium stainless steel, to improve the corrosion resistance and weldability and appropriate amount to increase the stability of elements Ti, Nb, Mo, etc., welding of stainless steel is better than the 13 chromium. Using the same type of chromium stainless steel electrode (G302, G307), should be above 200 ℃ preheating and post-weld tempering at about 800 ℃. If the weldment is not subjected to heat treatment should be used chrome-nickel stainless steel electrode (A107, A207).

12, chromium-nickel stainless steel with titanium calcium type coating and low hydrogen type. Titanium calcium type can be used for AC and DC, but AC welding shallow penetration depth, and easy to redness, so far as possible dc power supply. Diameter of 4.0 and below can be used for all-position welding parts, 5.0 and above for a flat butt and fillet welding.

13, in order to prevent corrosion of heat generated between the eyes, the welding current should not be too large, less than about 20% carbon electrode, the arc should not be too long, rapid cooling layers to narrow weld appropriate.

   Above 13 o'clock is our stainless steel laser cutting process often prone to problems, of course, there are other phenomena not listed on cutting stainless steel and how clever processing more knowledge, please pay attention to our website (Beijing Yi Electronics Co., Ltd. Tak Spirit) We are a professional production, design, processing, installation as one of the all-steel conglomerate.

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