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濟南復合板的熱處理要求有哪些?

來源:http://www.ebassfish.com/ 日期:2020-03-25 發布人:admin
  今天,金屬復合板生產廠家小編來講解一下復合板的熱處理要求:
  Today, the manufacturer of metal clad plate will explain the heat treatment requirements of the composite plate:
  為了消除爆炸復合界面的殘余應力,對爆炸復合試樣1Cr18Ni9Ti/Q235A進行了不同溫度、不同保溫時間的熱處理。對包層厚度d f=2mm,加載比R=1.20的試樣進行了焊接界面顯微硬度測量。樣品在550℃處理1h后,顯微硬度曲線與常溫曲線差異不大。但試樣在650℃和750℃處理1h后的顯微硬度曲線明顯低于常溫曲線,說明熱處理是有效的。
  In order to eliminate the residual stress of explosive composite interface, 1Cr18Ni9Ti / Q235A was heat treated at different temperature and holding time. The microhardness of the welding interface was measured for the samples with cladding thickness d f = 2mm and loading ratio r = 1.20. After the samples were treated at 550 ℃ for 1 h, the microhardness curve was not different from that at room temperature. However, the microhardness curves of the samples treated at 650 ℃ and 750 ℃ for one hour are obviously lower than those at room temperature, indicating that the heat treatment is effective.
  掃描電子顯微鏡樣品進行了分析,結果表明,熱處理后,是否組件兩邊擴散焊界面的,也就是說,有鉻和鎳組件的Q235A和硅和鐵組件1 cr18ni9ti。擴散程度與熱處理溫度無關,但與取樣位置有關:離界面越遠,擴散成分含量越少。說明界面兩側構件的擴散是爆炸焊接本身產生的,與熱處理無關。當溫度低于550℃時,即使在不銹鋼的亞表面也看不到碳的峰值(見圖1a)。但是,在650℃時,在離界面較遠的過渡區可以看到一個小的碳峰(見圖1b),這說明碳鋼中的碳已經擴散到不銹鋼的過渡區,這種碳成分的擴散與熱處理溫度有關。
  Scanning electron microscope (SEM) was used to analyze the samples. The results showed whether the interface of the two sides of the module was diffused after heat treatment, that is to say, Q235A with chromium and nickel module and 1Cr18Ni9Ti with silicon and iron module. The diffusion degree has nothing to do with the heat treatment temperature, but has something to do with the sampling position: the farther away from the interface, the less the diffusion component content. It shows that the diffusion of components on both sides of the interface is generated by explosive welding itself, and has nothing to do with heat treatment. When the temperature is lower than 550 ℃, the peak value of carbon can not be seen even on the sub surface of stainless steel (see Fig. 1a). However, at 650 ℃, a small carbon peak can be seen in the transition zone far away from the interface (see Fig. 1b), which indicates that carbon in carbon steel has diffused to the transition zone of stainless steel, and the diffusion of carbon composition is related to the heat treatment temperature.
  (a) 550℃不銹鋼二次表面,無碳峰(b) 650℃不銹鋼過渡區,有碳峰
  (a) 550 ℃ stainless steel secondary surface, no carbon peak (b) 650 ℃ stainless steel transition zone, with carbon peak
濟南復合板廠
  常溫550℃處理的碳鋼表面層(近界面層)具有纖維狀結構和嚴重變形引起的許多細小顆粒。核心結構為鐵素體和珠光體。第二階段為不銹鋼界面點狀組織,心臟為針狀組織。然而,在650℃處理的碳鋼試樣近界面區域的小顆粒結構消失(表明可能發生脫碳),晶粒變厚。核心結構仍為鐵素體和珠光體,但組織變形引起的滑移線已消失。在不銹鋼的界面上有大量的黑色小顆粒,這些小顆??赡苁翘蓟t顆粒經過脫碳后形成的。在750℃處理的碳鋼試樣表面金相與在650℃處理的碳鋼試樣表面金相相似,在近界面區域小顆粒的損失范圍增大,晶粒尺寸也增大。但鐵芯已轉變為板狀馬氏體+塊狀鐵素體,并對相變進行了估算。不銹鋼表面和鐵芯基本相同,為650℃。
  The surface layer (near interface layer) of carbon steel treated at 550 ℃ has fibrous structure and many fine particles caused by serious deformation. The core structure is ferrite and pearlite. The second stage is the stainless steel interface point like tissue, and the heart is needle like tissue. However, the small particle structure of the near interface area of the carbon steel treated at 650 ℃ disappeared (indicating that decarburization may occur), and the grains became thicker. The core structure is still ferrite and pearlite, but the slip line caused by structural deformation has disappeared. There are a lot of small black particles on the interface of stainless steel, which may be formed after decarburization of chromium carbide particles. The surface metallography of carbon steel treated at 750 ℃ is similar to that of carbon steel treated at 650 ℃, and the loss range of small particles and the grain size increase in the near interface region. However, the iron core has been transformed into plate martensite + massive ferrite, and the transformation has been estimated. The surface of stainless steel and iron core are basically the same, 650 ℃.
  綜上所述,當熱處理溫度低于550℃時,界面兩側近區顯微硬度沒有變化,Q235A鋼基本未脫碳。當熱處理溫度高于650℃時,Q235A鋼的顯微硬度明顯降低,但仍存在脫碳現象。因此,熱處理溫度估計在600℃左右。
  In conclusion, when the heat treatment temperature is lower than 550 ℃, the microhardness of the near zone on both sides of the interface does not change, and Q235A steel is basically not decarburized. When the heat treatment temperature is higher than 650 ℃, the microhardness of Q235A steel decreases obviously, but decarburization still exists. Therefore, the heat treatment temperature is estimated to be about 600 ℃.
  無論復合板是否經過熱處理,界面兩側都有物質擴散。擴散程度與熱處理溫度關系不大,但與離界面的距離有關。
  Whether the composite plate is heat treated or not, there is material diffusion on both sides of the interface. The diffusion degree is not related to the heat treatment temperature, but to the distance from the interface.
此文關鍵詞: 濟南復合板廠  

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