經濟部智慧財產局員工消費合作社印製 483781 A7 ___ B7 五、發明說明（1 ) 本發明係關於薄的不鏽鋼條之製造方法，直接令液態 金屬於由兩個與鋼條等速移動之冷卻壁組成的模中予已固 化，例如兩個具有平行軸之滾動輥的外壁。 • 在此鑄造法中，此鑄造法已達產業規模且被稱爲「雙 軋輥鑄造法」，主要一伴隨於鋼條品質的問題爲鋼條核心 可能出現孔隙。當鋼條經後續轉化（例如，酸洗、退火、 冷軋與其他轉化操作）後得到的產品中存有孔隙，因孔隙 會降低機械性質，故限制了產品的應用領域。 雙軋輥鑄造鋼條核心出現孔隙的原因可能類似於造成 (於較大尺寸規模時）鋼錠收縮孔與習知連續鑄造產品中 央孔隙（即，當產品固化不均勻時，固體金屬會將仍爲液 體金屬之囊密封）的原因，通常產品固化係於鋼條離開模 具壁時即已大部分完成，易言之，鋼條核心並非完全呈液 體狀態。囊中液體金屬冷卻固化後會收縮，於是造成空隙 ，這些密封囊在固化後便無法再被饋入新鮮之液態金屬， 所以無法被塡滿。這些孔隙不同於稱爲「氣孔」( blowhole )之球形缺陷，氣孔的成因爲溶解氣體釋出，而 且通常在靠近產品表面處發生。 E P 0 3 9 6 8 6 2提出於鋼條之雙軋輥鑄造法中 消除中央孔隙以及任何內部與表面缺陷的方法。根據此方 法，二個鑄造軋輥的圓周表面上偏移（offset )式地配置有 尺寸精密的溝槽。所以其目的在於防止軋輥表面上之固化 金屬層分離，導致鋼條固化不均勻。但是，僅僅防止該分 離並不足以完全消除中央孔隙。 ------------11 ------^--------I -- (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -4 - 483781 A7 B7 五、發明說明（2 ) 」τ P 8 2 5 2 6 5 3提出於鑄造操作中，令鋼條於 符合下式之條件下進行熱軋： r ^ (2 . 74xl〇— 5Τ2— 6 · 88x1 〇—2Τ •+43.55) (t〇 /w〇) 其中 r :熱軋縮減率； T :熱軋溫度（。C ); t 〇 :鋼條厚度方向之孔徑； w 〇 :鋼條寬度方向之孔徑。 根據此方法，熱軋時之縮減率需足以使孔隙於熱軋時 閉合，此縮減率之極小値視熱乳溫度（即，鋼條進入軋輥 咬合部的溫度）以及孔隙的形狀與方向而定。但是曾發現 這些熱軋條件仍不足以可靠地密合所有的孔隙，更重要的 ’此方法並不能完全防止密合孔隙於鋼條轉化時或產品應 用期間再次張開而使產品破裂。 本發明的目的在於提出一種方法，確保鋼條在完全固 化後核心中的中央孔隙已確定密合。 爲達此目的，本發明之製造薄的不鏽鋼條之方法，係 直接將厚度小於或等於8 rn m之條狀鋼水（liquid steel ) 於包含兩個冷卻移動壁的鑄造設備中予已固化，並將該鋼 條熱軋’前述固化在鋼條離開該壁時即已大部分完成，此 方法之特徵爲該熱軋係於軋鋼機中進行，該軋鋼機之工作 軋輥之直徑爲4 0 0至9 0 0 m m，鋼條離開該軋鋼機時 的溫度爲8 0 0至1 1 〇 〇 ° C，鋼條於熱軋時之厚度縮減 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） (請先閱讀背面之注意事項再填寫本頁) -------訂---------線—· 經濟部智慧財產局員工消費合作社印製 -5- 經濟部智慧財產局員工消費合作社印製 483781 A7 --- B7 五、發明說明（3 ) 率爲15至5〇%。 較好1熱軋係與鋼條之鑄造同時進行。鑄造設備可爲雙 軋輕鑄造型式。 • 如下文所述，本發明目的係由熱軋鋼機之工作軋輥直 徑、鋼條離開軋輥時的溫度與鋼條於熱軋時之厚度縮減率 寺要件組合而達成。 本發明可應用至各種等級不鏽鋼之鑄造，不鏽鋼通常 之碳含量低於或等於1 %，矽含量低於或等於1 %，錳含 量低於或等於1 5%，鉻含量爲1 0至3 0%，銅含量低 於或等於5%，氮含量低於或等於〇 . (這些含量係 以重量百分比表示）。鋼中亦可含有大量的鎳（至多4〇 %)或鉬（至多8%)。再者，一般說來，金屬中尙有其 他元素’不論爲雜質或是合金元素，特別是，硫、磷、鈦 、鈮、锆。其總含量不超過2 w t %。 如上文所述，薄的雙軋輥鑄造不鏽鋼條極可能於固化 時，當液囊被固體金屬包圍，便在核心產生孔隙。此現象 於漿狀區，亦稱爲「等軸區」，固化終了時發生，該等軸 區位於與軋輥接觸之上下已固化層間，前述已固化層亦稱 爲「柱狀區」。等軸區非常難以控制，其厚度隨柱狀區的 固化速度而定。所以，在柱狀區生長較快之處，等軸區會 被局部地密合起來。在密合部分的下游，液囊無法再被正 確地饋入液體金屬，當這些液囊固化時，金屬收縮便產生 孔隙。然而，前述現象不常發生，事實上，液相中等軸晶 體聚集才產生液囊，於是形成栓塞阻礙等軸區。等軸區中 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -6- -------!!.-----I — 訂---------線---AWI · (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 483781 A7 ___ B7 五、發明說明（4 ) 形成的孔隙係由不含氣體之通道與洞穴所組成，其於鋼條 厚度方向之最大尺寸相當於等軸區的厚度（即，1 〇 〇至 4 Ο Ο β m )，另一方向，通道與洞穴可長達1至2mm •。如上文所述，其並非球形氣孔，球形氣孔係由氣體釋出 或鋼條表面之內部缺陷所產生。 本發明的基本構思在於固化鋼條被熱軋時，使操作條 件不僅如已知地能夠導致中央孔隙的密合，亦能夠使因軋 壓而靠近之相對孔壁確實地熔接。如此便可確保在後續鋼 條的成型或所得產物的應用時，不會有孔隙打開的危險。 當鋼條熱軋時，有二個階段發生：首先，當鋼條厚度降低 時缺陷的內壁會靠近直到互相接觸；然後，接觸使鋼的組 成成分擴散而越過界面，造成孔壁熔接。但是，在鋼條離 開軋輥咬合部之前的瞬間，孔壁必須已有效地熔接，否則 鋼條壓縮後的釋放，即離開軋輥，會使得孔壁部分分離。_ 熔接的有效性取決於兩個因素：軋鋼機中與壁強迫接 觸的時間以及接觸的溫度。所以此強迫接觸必須於鋼條進 入軋鋼機後儘快發生，其持續時間主要取決於，當軋速一 定時（線上軋壓時，軋速主要取決於軋壓前鋼條的厚度） ，軋鋼機工作軋輥之直徑與工作軋輥施予鋼條上的厚度縮 減率。工作軋輥之直徑與縮減率越大，孔壁強迫接觸越快 且時間越長。但是並不能說爲了解決該問題，便使工作軋 輥之直徑與縮減率越高越好。因爲縮減率太高可能會超過 鋼條的熱變形性，導致表面裂痕發生，這是鋼條絕對要避 免的。再者’孔壁強迫接觸的溫度不僅取決於鋼條進入軋 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） i (請先閱讀背面之注意事項再填寫本頁)Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 483781 A7 ___ B7 V. Description of the Invention (1) The present invention relates to the manufacturing method of thin stainless steel bars, which directly causes liquid metal to be cooled by two cooling walls moving at the same speed as the steel bars. The composition of the mold is pre-cured, such as the outer wall of two rolling rollers with parallel axes. • In this casting method, this casting method has reached the industrial scale and is called “double roll casting method”. The main problem associated with the quality of the steel bar is that the core of the steel bar may have pores. When the steel bar undergoes subsequent transformation (for example, pickling, annealing, cold rolling, and other transformation operations), there are pores in the product. The pores will reduce the mechanical properties, which limits the application field of the product. The reason for the pores in the core of the double-rolled cast steel bar may be similar to (for larger sizes) the shrinkage pores of the ingot and the central pores of the conventional continuous casting product (that is, when the product is not uniformly solidified, the solid metal will still be liquid The reason is that the solidification of the product is usually completed when the steel bar leaves the mold wall. In other words, the core of the steel bar is not completely liquid. The liquid metal in the capsule will shrink after cooling and solidification, which will cause voids. After curing, these sealed capsules can no longer be fed with fresh liquid metal, so they cannot be filled. These pores are different from spherical defects called "blowholes". The formation of pores is caused by the release of dissolved gas and usually occurs near the surface of the product. E P 0 3 9 6 8 6 2 proposes a method for eliminating central voids and any internal and surface defects in the double roll casting of steel bars. According to this method, grooves with precise dimensions are arranged on the circumferential surfaces of the two casting rolls in an offset manner. Therefore, the purpose is to prevent the solidified metal layer from separating on the surface of the roll, which causes uneven curing of the steel bar. However, simply preventing this separation is not sufficient to completely eliminate the central pores. ------------ 11 ------ ^ -------- I-(Please read the notes on the back before filling this page) This paper size is applicable to China Standard (CNS) A4 specification (210 X 297 mm) -4-483781 A7 B7 V. Description of the invention (2) "τ P 8 2 5 2 6 5 3 In the casting operation, the steel bar should meet the following formula: Hot rolling under the conditions: r ^ (2. 74xl0-5T2-6 · 88x1 0-2T • +43.55) (t〇 / w〇) where r: hot rolling reduction rate; T: hot rolling temperature (.C) t 〇: diameter of the steel bar in the thickness direction; w 〇: diameter of the steel bar in the width direction. According to this method, the reduction rate during hot rolling needs to be sufficient to close the pores during hot rolling. The minimum of this reduction rate depends on the hot milk temperature (that is, the temperature at which the steel bar enters the roll nip) and the shape and direction of the pores. . However, it has been found that these hot-rolling conditions are still not enough to reliably seal all the pores. More importantly, this method cannot completely prevent the closed pores from cracking during the transformation of the steel bar or during the application of the product. The purpose of the present invention is to propose a method to ensure that the central pores in the core of the steel bar have been tightly fixed after being completely cured. To achieve this, the method for manufacturing thin stainless steel strips of the present invention is to directly solidify the strip-shaped molten steel having a thickness of less than or equal to 8 rn m in a casting equipment including two cooling moving walls, And the hot rolling of the steel bar is mostly completed when the steel bar leaves the wall. This method is characterized in that the hot rolling is performed in a rolling mill, and the diameter of the working roll of the rolling mill is 4 0 0 To 900 mm, the temperature of the steel bar when leaving the rolling mill is 800 to 11000 ° C, and the thickness of the steel bar during hot rolling is reduced. This paper applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) (Please read the precautions on the back before filling out this page) ------- Order --------- Line—— · Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-5 -Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 483781 A7 --- B7 V. Description of invention (3) The rate is 15 to 50%. It is preferred that the hot rolling system is performed simultaneously with the casting of the steel bar. The casting equipment can be a double-rolled light casting type. • As described below, the object of the present invention is achieved by combining the working roll diameter of a hot rolling mill, the temperature when the steel bar leaves the roll, and the thickness reduction rate of the steel bar during hot rolling. The invention can be applied to the casting of various grades of stainless steel. The stainless steel usually has a carbon content of less than or equal to 1%, a silicon content of less than or equal to 1%, a manganese content of less than or equal to 15%, and a chromium content of 10 to 30. %, Copper content is less than or equal to 5%, nitrogen content is less than or equal to 0.1 (these contents are expressed by weight percentage). Steel can also contain large amounts of nickel (up to 40%) or molybdenum (up to 8%). Furthermore, in general, the metal contains other elements', whether they are impurities or alloying elements, and in particular, sulfur, phosphorus, titanium, niobium, and zirconium. Its total content does not exceed 2 w t%. As mentioned above, thin double-rolled cast stainless steel bars are very likely to solidify. When the sac is surrounded by solid metal, voids are created in the core. This phenomenon occurs in the slurry region, also known as the "equiaxed region", which occurs at the end of curing. These axial regions are located between the cured layers above and below the contact with the roll. The aforementioned cured layer is also referred to as the "column region". The equiaxed area is very difficult to control, and its thickness depends on the curing speed of the columnar area. Therefore, where the columnar area grows faster, the equiaxed area will be partially tightly closed. Downstream of the tight part, the sacs can no longer be properly fed into the liquid metal. When these sacs solidify, the metal shrinks to create porosity. However, the aforementioned phenomenon does not occur very often. In fact, the liquid phase equiaxed crystals are aggregated to produce a sac, and an embolism obstructs the equiaxed area. The paper size of the paper in the isometric area applies the Chinese National Standard (CNS) A4 (210 X 297 mm) -6- ------- !! .----- I — Order ------ --- Line --- AWI · (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 483781 A7 ___ B7 V. Description of the invention (4) Composed of gas channels and caves, the maximum size in the thickness direction of the steel bar is equivalent to the thickness of the equiaxed area (that is, 100 to 4 〇 β β m). In the other direction, the channels and caves can be as long as 1 to 2mm •. As mentioned above, it is not a spherical pore, which is caused by gas release or internal defects on the surface of the steel bar. The basic idea of the present invention is that when the solidified steel bar is hot-rolled, the operating conditions can not only cause the central pores to be tightly closed as known, but also can reliably weld the opposite hole walls approached by rolling. This ensures that there is no danger of pore opening during subsequent forming of the steel bar or application of the resulting product. When the steel bar is hot-rolled, two stages occur: first, when the thickness of the steel bar is reduced, the inner walls of the defects approach until they contact each other; then, the contact causes the steel's constituents to diffuse across the interface, causing the hole wall to weld. However, the hole wall must be effectively welded immediately before the steel bar leaves the nip of the roll. Otherwise, the release of the steel bar after compression, that is, leaving the roll, will cause the hole wall part to separate. _ The effectiveness of welding depends on two factors: the time of forced contact with the wall in the rolling mill and the temperature of the contact. Therefore, this forced contact must occur as soon as the steel bar enters the rolling mill, and its duration mainly depends on the rolling speed. When the rolling speed is fixed (the rolling speed depends on the thickness of the steel bar before rolling), the rolling mill works. The diameter of the roll and the reduction in thickness applied to the bar by the work roll. The larger the diameter and reduction of the work roll, the faster and longer the forced contact of the hole wall. However, it cannot be said that in order to solve this problem, the higher the work roll diameter and the reduction ratio, the better. Because the reduction rate is too high, it may exceed the thermal deformability of the steel bar, causing surface cracks, which is absolutely avoided by the steel bar. Moreover, the temperature of the forcible contact of the hole wall is not only determined by the steel bar entering the rolling. The paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm).
483781 A7 ______ B7 五、發明說明（5 ) 鋼機的溫度，亦取決於鋼條與軋輥的接觸時間。若鋼條進 入溫度固定時，當軋輥之直徑很大，會使鋼條冷卻而使孔 壁無法完全熔接。此時，鋼條離開軋輥的溫度可以作爲孔 •壁於軋輥咬合處熔接情形的指示。 所以鋼條離開軋輥的溫度要高到足以使孔隙熔接，但 又不能太高使軋輥有過多的熱負載，因爲其將使軋輥表面 受損，進而損傷鋼條表面，提高糙度。所以只要適當地合 倂乳輥直徑、縮減率與鋼條離開軋輥的溫度等條件，本發 明目的可被達成而不會損傷鋼條的一般性質。 爲了決定如何組合這些參數，進行一系列的試驗。其 中使用同一型式的不鏽鋼，變化軋鋼機軋輥直徑、鋼條厚 度縮減率與鋼條離開軋輥的溫度。軋鋼機與鑄造設備爲同 線操作。各試驗中涉及一種特徵而可決定孔隙是否已有效 地熔接。這些特徵包括張力試驗試樣的破裂與破裂面的檢 視。若破裂面具有孔隙，且孔隙於張力試驗中打開了’便 可結論熔接並不令人滿意。若破裂面不具有孔隙，便判斷 熔接已令人滿意。 表1爲試驗所用鋼的組成，試驗結果列於表2。各種 元素的含量爲重量百分比。表1亦列出鋼條離開鐘造乳車比 的厚度，試驗便於此鋼條上進行，此外並列出 鑄造軋輥 與熱軋鋼機間的鑄造速度。 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公爱） (請先閱讀背面之注意事項再填寫本頁) -------訂---------線—AVI. 經濟部智慧財產局員工消費合作社印製 -8 - 483781 A7 B7 五、發明說明（6 ) 表！：試驗鑄造流程所用鋼的組成’鑄造鋼條的厚度483781 A7 ______ B7 V. Description of the invention (5) The temperature of the steel machine also depends on the contact time between the steel bar and the roll. If the temperature of the steel bar is fixed, when the diameter of the roll is large, the steel bar will be cooled and the hole wall cannot be completely welded. At this time, the temperature of the steel bar leaving the roll can be used as an indication of the welding situation of the hole at the roll nip. Therefore, the temperature of the steel bar leaving the roll should be high enough to weld the pores, but not too high to cause excessive heat load on the roll, because it will damage the surface of the roll, thereby damaging the surface of the steel bar and increasing the roughness. Therefore, as long as the conditions such as the diameter of the milk roll, the reduction rate, and the temperature at which the steel bar leaves the roll are appropriately combined, the purpose of the present invention can be achieved without damaging the general properties of the steel bar. To decide how to combine these parameters, a series of experiments are performed. Among them, the same type of stainless steel is used, and the rolling mill roll diameter, the thickness reduction rate of the steel bar and the temperature at which the steel bar leaves the roll are changed. Rolling mills and casting equipment operate on the same line. Each test involves a feature that determines whether the pores have been effectively welded. These features include inspection of the fracture and fracture surface of the tensile test specimen. If the fracture surface has pores and the pores are opened in the tension test, it can be concluded that the welding is not satisfactory. If the fracture surface does not have pores, the welding is judged to be satisfactory. Table 1 shows the composition of the steel used in the test. The test results are shown in Table 2. The content of each element is a percentage by weight. Table 1 also lists the thickness of the steel bar from the bell milking car ratio. The test is convenient for this steel bar. In addition, the casting speed between the casting roll and the hot rolling mill is also listed. This paper size applies to China National Standard (CNS) A4 specification (210 X 297 public love) (Please read the precautions on the back before filling this page) ------- Order --------- Line —AVI. Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-483781 A7 B7 V. Description of Invention (6) Table! ： Test composition of steel used in casting process ’thickness of cast steel bar
N 8.6 8.6 <0.3 C rN 8.6 8.6 < 0.3 C r
C Μ Τ Ν 鋼條厚度 鑄造速度 18 <0.5 1_8_ <0.5 16.5 11.5 (請先閱讀背面之注意事項再填寫本頁) <0.2 <0.2 <0.5 <0.5 <0.1 <0.1 <0.01 0.05 4mm 2 5 m/mm, <0.01 0.05 <0.01 0.15 0.04 0.01 2mm 3 mm 3 mm 1 OOm/mm. 60m/min, 60m/min, 經濟部智慧財產局員工消費合作社印製C Μ Τ Ν bar thickness casting speed 18 < 0.5 1_8_ < 0.5 16.5 11.5 (Please read the precautions on the back before filling this page) < 0.2 < 0.2 < 0.5 < 0.5 < 0.1 < 0.1 < 0.01 0.05 4mm 2 5 m / mm, < 0.01 0.05 < 0.01 0.15 0.04 0.01 2mm 3 mm 3 mm 1 OOm / mm. 60m / min, 60m / min, printed by the Consumer Cooperative of Intellectual Property Bureau of the Ministry of Economic Affairs
岡 鏽 不 I豆 , 素 岡鐵 > § A 鏽型 與不ϋ Α 田 3 程斯 4 流沃 造型 I 鑄 4 S 〇 I 3 A I於 S 當 I 相 A 成 知組 習的 mb 當程 相流 成造 組鑄 的 。 化斤 定戶 安程 鈦流 型造。 9鑄中 ο 些 其 4 這於 出列 I 列亦 5 2 件 I 表條 A 驗 於 試 當 相 成 組 C 程 流 造 鑄 岡 0 &令 II 不 體 素 鐵 之 應 對 果 結 驗 試 之 條 鋼 得 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -9 - 483781 A7 B7 五、發明說明（7 ) 經濟部智慧財產局員工消費合作社印製 表2 :鑄造流程A，A ’，B與C所得鋼條之試驗結果 依據本發 明 f尋造流程 軋鋼機軋輥 直徑(mm) 縮減率 (%) 鋼條離開軋 鋼機之溫度 CC) 孔熔接 其他缺陷 否 A 300 50 1100 否 並 j\\\ 否 A 400 10 1100 否 j\w 否 A 400 15 750 否 並 j \w 是 A，A’，B，C 400 15 800 是 j w\ 是 A，A’，B，C 400 15 1100 是 ί f ΤτΤΓ J \ \\ 否 A 400 15 1150 是 過度粗糙 否 A 400 50 750 否 Μ j\\\ 是 A，A’，B，C 400 50 800 是 te jw\ 是 A，A’，B，C 400 50 1100 是 te j\w 否 A 400 50 1150 是 過度粗糙 否 A 400 60 1100 是 裂痕 否 A 900 10 1100 否 並 J \ w 否 A 900 15 750 否 Μ j \ \\ 是 A，A’，B，C 900 15 800 是 te j \ w 是 A，A’，B，C 900 15 1100 是 Μ 否 A 900 15 1150 是 過度粗糙 否 A 900 50 750 否 Μ j\\\ 是 A，A’，B，C 900 50 800 是 fiE j \\\ 是 A，A’，B，C 900 50 1100 是 M 否 A 900 50 1150 是 過度粗糙 否 A 900 60 1100 是 裂痕 否 A 1000 50 750 否 Μ j \ w (請先閱讀背面之注意事項再填寫本頁) 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -10 - 483781 A7 _________ ______________ B7 五、發明說明（8 ) (請先閱讀背面之注意事項再填寫本頁) 由這些試驗結果可看出’當合倂下列三個條件，可以 獲致有效的孔隙熔接，且不會在鋼條上造成表面裂痕與過 度粗糙： • ( 1 )軋鋼機工作軋輥直徑爲4 0 0至9 0 0 m m ; (2 )軋壓時鋼條厚度縮減率爲1 5至5 0% ;Gang rust and I beans, Sugaoka iron > § A rust type and ϋ ϋ Tian 3 Cheng Si 4 flowing design I cast 4 S 〇I 3 AI in S when I phase A into the cognition group mb when the phase flows into Made of cast. Huajin Settlement Ancheng Titanium flow model. 9 Casting ο Some of them 4 This is listed in the I column and 5 2 pieces I Form A Tested in the test group C Process flow to make the cast gang 0 & order II not to be the result of the test The paper size of the steel is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -9-483781 A7 B7 V. Description of the invention (7) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs Table 2: Casting Process A The test results of steel bars obtained by A ', B, and C are in accordance with the f process of the present invention. Roller diameter (mm) of the rolling mill Reduction rate (%) The temperature of the steel bar leaving the rolling mill CC) Hole welding other defects No A 300 50 1100 No and j \\\ No A 400 10 1100 No j \ w No A 400 15 750 No and j \ w Yes A, A ', B, C 400 15 800 Yes jw \ Yes A, A', B, C 400 15 1100 Yes ί ΤτΤΓ J \ \\ No A 400 15 1150 Yes Overly rough No A 400 50 750 No Μ j \\\ Yes A, A ', B, C 400 50 800 Yes te jw \ Yes A, A' , B, C 400 50 1100 yes te j \ w no A 400 50 1150 yes excessively rough no A 400 60 1100 yes crack no A 900 10 1100 no and J \ w No A 900 15 750 No M j \ \\ Yes A, A ', B, C 900 15 800 Yes te j \ w Yes A, A', B, C 900 15 1100 Yes M No A 900 15 1150 Is excessively rough No A 900 50 750 No Μ j \\\ Yes A, A ', B, C 900 50 800 Yes fiE j \\\ Yes A, A', B, C 900 50 1100 Yes M No A 900 50 1150 Is excessive Rough No A 900 60 1100 Yes Crack No A 1000 50 750 No Μ j \ w (Please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) -10-483781 A7 _________ ______________ B7 V. Description of the invention (8) (Please read the notes on the back before filling this page) From these test results, you can see that when the following three conditions are combined, effective pore welding can be achieved Without causing surface cracks and excessive roughness on the steel bar: (1) the diameter of the working roll of the rolling mill is 400 to 900 mm; (2) the reduction rate of the thickness of the steel bar during rolling is 15 to 5 0%;
(3 )鋼條離開軋輥的溫度爲8 0 0 °C至1 1 0 〇 °C 0 另外’在試驗條件下未觀察到厚度/鑄造速度組合的 影響：因爲鑄造參數相同的鑄造流程A，A ’之結果相同 〇 經濟部智慧財產局員工消費合作社印製 如上述，這些試驗係於熱軋廠中進行，此熱軋廠與鑄 造設備同線操作且位於鋼條捲取設備之前。但是此特徵並 非必須，熱軋可於獨立於鑄造設備與捲取設備之設備中進 行，只要是未捲取之鋼條且再加熱過後便可進行熱軋。然 而基於各種理由，同線操作較好。第一爲連續操作之經濟 優點。在第一個例子中，鋼條製造流程可以縮短。此外’ 亦可節省捲取器與相當高功率之再加熱設備，因爲鑄條可 能不夠熱到得到適宜之熱軋溫度。所以可以使用一覆蓋物 阻止鋼條在離開鑄造軋輥與進入乳鋼機時之輻射。但是’ 若需要再加熱鋼條，則可使用低功率之感應爐，其功率足 以使鋼條之溫度升高數百度。再者，同線操作熱軋免去了 剛鑄好鋼條的捲取，故可消除捲取時鋼條的損傷，特別是 具有未結晶結構之較厚鋼條。最後，因爲無須將鋼條自室 溫再加熱至熱軋溫度，可以免除鋼條的表面再氧化’此再 -11 - 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） 483781 A7 ________________ B7 五、發明說明（9 ) 氧化通常於此操作中發生。再氧化也會形成鏽，使得此鏽 會嵌入鋼條與軋鋼機軋輥中，使得產品在酸洗後表面受損 〇 _ 本發明不僅可用於雙軋輥鑄造設備中，亦可用於任何 用兩個冷卻移動壁來鑄造薄的不鏽鋼條（如，連續鋼條） 之設備中。 (請先閱讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） -12 -(3) The temperature at which the steel bar leaves the roll is 8 0 ° C to 1 1 0 0 ° C 0 In addition, 'the effect of the thickness / casting speed combination is not observed under the test conditions: because the casting process A, A with the same casting parameters 'The results are the same. The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed as above. These tests were performed in a hot rolling mill that operates on the same line as the casting equipment and is located in front of the steel coil winding equipment. However, this feature is not necessary. Hot rolling can be performed in a separate equipment from the casting equipment and the coiling equipment. As long as it is an unrolled steel bar and reheated, hot rolling can be performed. However, for various reasons, in-line operation is better. The first is the economic advantage of continuous operation. In the first example, the steel bar manufacturing process can be shortened. In addition, it also saves the coiler and the reheating equipment with a relatively high power, because the casting rod may not be hot enough to obtain a suitable hot rolling temperature. Therefore, a covering can be used to prevent the steel bar from radiating when it leaves the casting roll and enters the steel mill. But if you need to reheat the steel bar, you can use a low-power induction furnace with enough power to raise the temperature of the steel bar by hundreds of degrees. Furthermore, hot rolling in the same line eliminates the coiling of the freshly cast steel bar, so it can eliminate the damage of the steel bar during coiling, especially for thicker steel bars with an uncrystallized structure. Finally, because it is not necessary to reheat the steel bar from room temperature to the hot rolling temperature, the surface of the steel bar can be re-oxidized. This time -11-This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) 483781 A7 ________________ B7 5. Description of the Invention (9) Oxidation usually occurs during this operation. Re-oxidation will also form rust, so that this rust will be embedded in the steel bar and rolling mill rolls, which will damage the surface of the product after pickling. Moving equipment to cast thin stainless steel bars (eg, continuous steel bars). (Please read the precautions on the back before filling out this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -12-