TWI901000B - Method of manufacturing cold-rolled steel sheet and cold-rolled steel sheet - Google Patents
Method of manufacturing cold-rolled steel sheet and cold-rolled steel sheetInfo
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- TWI901000B TWI901000B TW113103622A TW113103622A TWI901000B TW I901000 B TWI901000 B TW I901000B TW 113103622 A TW113103622 A TW 113103622A TW 113103622 A TW113103622 A TW 113103622A TW I901000 B TWI901000 B TW I901000B
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Abstract
Description
本發明係關於一種鋼片的製造方法及一種鋼片，特別係關於一種製造冷軋鋼片的方法及一種冷軋鋼片。The present invention relates to a method for manufacturing a steel sheet and a steel sheet, and in particular to a method for manufacturing a cold-rolled steel sheet and a cold-rolled steel sheet.
傳統冷軋鋼材製造方法，須以添加合金或是提升碳含量的方式來提升強度，並且於冷軋後施以批次退火或連續退火來調整內部金相組織，以及於退火後透過調質軋延來賦予鋼片表面的粗糙度。Traditional cold-rolled steel manufacturing methods require increasing strength by adding alloys or raising carbon content. Batch or continuous annealing is then performed after cold rolling to adjust the internal metallographic structure. After annealing, tempering and rolling are performed to impart surface roughness to the steel sheet.
例如，中華民國專利公告第I683906號公開了一種中碳鋼的製造方法，其係透過盒退火步驟與連續退火步驟的複合熱加工處理於中碳鋼中保留球狀碳化物組織，並且形成細晶組織，進而減少了製程時間，並提升中碳鋼的降伏強度、抗拉強度、硬度及伸長率等機械性質。For example, Republic of China Patent Publication No. I683906 discloses a method for manufacturing medium-carbon steel. This method uses a combined heat treatment process consisting of a box annealing step and a continuous annealing step to retain a spheroidal carbide structure and form a fine-grained structure within the medium-carbon steel. This reduces process time and improves the medium-carbon steel's mechanical properties, including yield strength, tensile strength, hardness, and elongation.
然而，現今鋼鐵產業供過於求，於新產品、新製程開發同時也強調精簡製程以降低生產成本。因此，習知的冷軋鋼片的製程有其改良之必要性。However, the current oversupply in the steel industry has led to an emphasis on streamlining processes to reduce production costs while developing new products and processes. Therefore, improvements are necessary to the traditional cold-rolled steel sheet manufacturing process.
本發明之主要目的在於提供一種製造冷軋鋼片的方法，能在使用低碳鋼的基礎下，改善所得到的冷軋鋼片（冷軋全硬板）的硬度及粗糙度，並且簡化製程。The main purpose of the present invention is to provide a method for manufacturing cold-rolled steel sheets, which can improve the hardness and roughness of the resulting cold-rolled steel sheets (cold-rolled full-hard plates) while using low-carbon steel and simplify the manufacturing process.
本發明之製造冷軋鋼片的方法係應用於製造冷軋全硬板，一般而言，全硬板係指在製程中，鋼材基本上不經退火處理。The method of manufacturing cold-rolled steel sheets of the present invention is applied to the manufacture of cold-rolled fully hardened steel sheets. Generally speaking, fully hardened steel sheets refer to steel sheets that are substantially not annealed during the manufacturing process.
為了達上述之目的，在本發明之一實施方式中，提供一種製造冷軋鋼片的方法，包含以下步驟：步驟10：提供一鋼材，其中以該鋼材的總重量為100 wt%計，該鋼材包含0.08至0.2 wt%的碳、0.3至0.4 wt%的錳、小於0.025 wt%的磷、小於0.025 wt%的硫、小於0.04 wt%的矽、小於0.1 wt%的銅、小於0.1 wt%的鈮、小於0.1 wt%的鉻、小於0.05 wt%的鉬，以及餘量的鐵；步驟20：對該鋼材進行熱軋，以形成一熱軋片；以及步驟30：將該熱軋片進行連續式冷軋，該連續式冷軋包含多道次連續軋延，其中在最末道軋延中，使用放電加工工輥對該熱軋片進行軋延，以產生表面具有粗糙度的該冷軋鋼片，其中該最末道軋延的工輥粗糙度為3.7 µm至4.7 µm，該最末道軋延的軋延力為500牛頓至700牛頓，並且該最末道軋延的軋延裁減率為小於1%。To achieve the above-mentioned object, in one embodiment of the present invention, a method for manufacturing a cold-rolled steel sheet is provided, comprising the following steps: Step 10: providing a steel material, wherein, based on the total weight of the steel material being 100 wt%, the steel material comprises 0.08 to 0.2 wt% of carbon, 0.3 to 0.4 wt% of manganese, less than 0.025 wt% of phosphorus, less than 0.025 wt% of sulfur, less than 0.04 wt% of silicon, less than 0.1 wt% of copper, less than 0.1 wt% of niobium, less than 0.1 wt% of chromium, less than 0.05 wt% molybdenum, and the balance iron; step 20: hot rolling the steel material to form a hot-rolled sheet; and step 30: continuously cold rolling the hot-rolled sheet, wherein the continuous cold rolling includes multiple continuous rolling passes, wherein in the final rolling pass, the hot-rolled sheet is rolled using an electrodischarge machining roll to produce the cold-rolled steel sheet having a surface roughness, wherein the roll roughness of the final rolling pass is 3.7 μm to 4.7 μm, the rolling force of the final rolling pass is 500 Newtons to 700 Newtons, and the rolling reduction rate of the final rolling pass is less than 1%.
在本發明之一實施方式中，在該步驟30中，該最末道軋延的軋延速度為800 mpm至900 mpm。In one embodiment of the present invention, in step 30, the rolling speed of the final rolling is 800 mpm to 900 mpm.
在本發明之一實施方式中，在該步驟10中，該鋼材包含小於0.1 wt%的雜質。In one embodiment of the present invention, in step 10, the steel material contains less than 0.1 wt% of impurities.
在本發明之一實施方式中，在該步驟30後，該製造冷軋鋼片的方法還包含一步驟40：對該冷軋鋼片進行精整。In one embodiment of the present invention, after step 30, the method for manufacturing a cold-rolled steel sheet further includes step 40: finishing the cold-rolled steel sheet.
在本發明之一實施方式中，該步驟40不包含調質軋延處理。In one embodiment of the present invention, step 40 does not include tempering and rolling treatment.
在本發明之一實施方式中，在該步驟30中，該連續式冷軋包含5道次連續軋延，在第5道軋延中，使用放電加工工輥對該熱軋片進行軋延，以產生表面具有粗糙度的該冷軋鋼片。In one embodiment of the present invention, in step 30, the continuous cold rolling includes five continuous rolling passes. In the fifth rolling pass, the hot rolled sheet is rolled using an electrodischarge processing roller to produce the cold rolled steel sheet with a rough surface.
在本發明之一實施方式中，在該步驟30中，係採用四重式軋機進行該連續式冷軋。In one embodiment of the present invention, in step 30, a quadruple rolling mill is used to perform the continuous cold rolling.
在本發明之一實施方式中，在該步驟30中，係採用四重式軋機進行該5道次連續軋延。In one embodiment of the present invention, in step 30, a quadruple rolling mill is used to perform the five-pass continuous rolling.
為了達上述之目的，在本發明之一另一實施方式中，提供一種透過以上所述之製造冷軋鋼片的方法所製成的冷軋鋼片，包含：以該鋼材的總重量為100 wt%計，0.08至0.2 wt%的碳、0.3至0.4 wt%的錳、小於0.025 wt%的磷、小於0.025 wt%的硫、小於0.04 wt%的矽、小於0.1 wt%的銅、小於0.1 wt%的鈮、小於0.1 wt%的鉻、小於0.05 wt%的鉬，以及餘量的鐵，其中該冷軋鋼片的粗糙度大於或等於0.6 µm，該冷軋鋼片的維氏硬度係大於170。To achieve the above-mentioned objectives, in another embodiment of the present invention, a cold-rolled steel sheet is provided, produced by the above-mentioned method for producing a cold-rolled steel sheet. The cold-rolled steel sheet comprises: based on 100 wt% of the total weight of the steel material, 0.08 to 0.2 wt% of carbon, 0.3 to 0.4 wt% of manganese, less than 0.025 wt% of phosphorus, less than 0.025 wt% of sulfur, less than 0.04 wt% of silicon, less than 0.1 wt% of copper, less than 0.1 wt% of niobium, less than 0.1 wt% of chromium, less than 0.05 wt% of molybdenum, and the remainder of iron. The cold-rolled steel sheet has a roughness greater than or equal to 0.6 µm and a Vickers hardness greater than 170.
在本發明之一實施方式中，該碳的含量為0.08至0.11 wt%。In one embodiment of the present invention, the carbon content is 0.08 to 0.11 wt %.
本發明之有益效果在於：透過本發明的製造冷軋鋼片的方法，得以在使用低碳鋼的情況下，且無須退火調質處理，得到粗糙度且硬度相當於中碳鋼之硬度的冷軋鋼片，進而達到降低生產成本及簡化製程的技術效果。The beneficial effect of the present invention is that, through the method of manufacturing cold-rolled steel sheets of the present invention, it is possible to obtain cold-rolled steel sheets with a roughness and hardness equivalent to that of medium-carbon steel while using low-carbon steel and without annealing and tempering treatment, thereby achieving the technical effects of reducing production costs and simplifying the manufacturing process.
下面將結合本發明之實施方式中的附圖，對本發明之實施方式中的技術方案進行清楚、完整地描述。另外，爲了更好地說明本發明，在下文的具體實施方式中給出了眾多的具體細節。本領域技術人員應當理解，沒有某些具體細節，本發明同樣可以實施。The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention, combined with the accompanying drawings. In addition, to better illustrate the present invention, numerous specific details are provided in the specific embodiments below. Those skilled in the art will understand that the present invention can be practiced without certain specific details.
參照圖1，根據本發明之一實施方式的一種製造冷軋鋼片的方法，包含以下步驟：Referring to FIG1 , a method for manufacturing a cold-rolled steel sheet according to one embodiment of the present invention comprises the following steps:
步驟S10：提供一鋼材，其中以該鋼材的總重量為100 wt%計，該鋼材包含0.08 wt%至0.2 wt%（例如：0.08 wt%至0.11 wt%；例如：0.08 wt%、0.09 wt%、0.1 wt%、0.11 wt%、0.13 wt%、0.15 wt%、0.2 wt%）的碳、0.3 wt%至0.4 wt%（例如：0.3 wt%、0.35 wt%、0.4 wt%）的錳、小於0.025 wt%（例如：0.025 wt%、0.024 wt%、0.023 wt%、0.022 wt%、0.021 wt%）的磷、小於0.025 wt%（例如：0.025 wt%、0.024 wt%、0.023 wt%、0.022 wt%、0.021 wt%）的硫、小於0.04 wt%（例如：0.04 wt%、0.03 wt%、0.02 wt%、0.01 wt%）的矽、小於0.1 wt%（例如：0.1 wt%、0.09 wt%、0.08 wt%、0.07 wt%、0.06 wt%、0.05 wt%、0.04 wt%、0.03 wt%、0.02 wt%、0.01 wt%）的銅、小於0.1 wt%（例如：0.1 wt%、0.09 wt%、0.08 wt%、0.07 wt%、0.06 wt%、0.05 wt%、0.04 wt%、0.03 wt%、0.02 wt%、0.01 wt%）的鈮、小於0.1 wt%（例如：0.1 wt%、0.09 wt%、0.08 wt%、0.07 wt%、0.06 wt%、0.05 wt%、0.04 wt%、0.03 wt%、0.02 wt%、0.01 wt%）的鉻、小於0.05 wt%（例如：0.05 wt%、0.04 wt%、0.03 wt%、0.02 wt%、0.01 wt%）的鉬，以及餘量的鐵。較佳的，該鋼材包含小於0.1 wt%的雜質。詳細而言，在步驟S10之前，還包括步驟S01的煉鋼及連鑄，以得到該鋼材。Step S10: providing a steel material, wherein the steel material comprises, based on the total weight of the steel material as 100 wt%, 0.08 wt% to 0.2 wt% (e.g., 0.08 wt% to 0.11 wt%; e.g., 0.08 wt%, 0.09 wt%, 0.1 wt%, 0.11 wt%, 0.13 wt%, 0.15 wt%, 0.2 wt%) of carbon, 0.3 wt% to 0.4 wt% (e.g., 0.3 wt%, 0.35 wt%, 0.4 wt%) of manganese, less than 0.025 wt% (e.g., 0.025 wt%, 0.024 wt%, 0.023 wt%, 0.022 wt%, 0.021 wt%) of phosphorus, less than 0.025 wt% (e.g., 0.025 wt%) of tungsten; wt%, 0.024 wt%, 0.023 wt%, 0.022 wt%, 0.021 wt%) of sulfur, less than 0.04 wt% (e.g., 0.04 wt%, 0.03 wt%, 0.02 wt%, 0.01 wt%) of silicon, less than 0.1 wt% (e.g., 0.1 wt%, 0.09 wt%, 0.08 wt%, 0.07 wt%, 0.06 wt%, 0.05 wt%, 0.04 wt%, 0.03 wt%, 0.02 wt%, 0.01 wt%) of copper, less than 0.1 wt% (e.g., 0.1 wt%, 0.09 wt%, 0.08 wt%, 0.07 wt%, 0.06 wt%, 0.05 wt%, 0.04 wt%, 0.03 wt%, 0.02 wt%, 0.01 wt%) of niobium, less than 0.1 wt% (e.g., 0.1 wt%, 0.09 wt%, 0.08 wt%, 0.07 wt%, 0.06 wt%, 0.05 wt%, 0.04 wt%, 0.03 wt%, 0.02 wt%, 0.01 wt%) of chromium, less than 0.05 wt% (e.g., 0.05 wt%, 0.04 wt%, 0.03 wt%, 0.02 wt%, 0.01 wt%) of molybdenum, and the remainder of iron. Preferably, the steel contains less than 0.1 wt% of impurities. Specifically, prior to step S10, the steel further includes steel smelting and continuous casting in step S01 to obtain the steel.
步驟S20：對該鋼材進行熱軋，以形成一熱軋片。Step S20: hot rolling the steel material to form a hot rolled sheet.
步驟S30：將該熱軋片進行連續式冷軋，例如，可採用四重式軋機來進行該連續式冷軋。該連續式冷軋包含多道次連續軋延，其中在最末道軋延中，使用放電加工工輥對該熱軋片進行軋延，以產生表面具有粗糙度的該冷軋鋼片。該最末道軋延的工輥粗糙度為3.7 µm至4.7 µm，例如：3.7 µm、3.8 µm、3.9 µm、4 µm、4.1 µm、4.2 µm、4.3 µm、4.4 µm、4.5 µm、4.6 µm、4.7 µm，選擇性的，例如4.22 µm、4.23 µm、4.25 µm、4.31 µm。該最末道軋延的軋延力為500牛頓至700牛頓，例如：500牛頓、550牛頓、600牛頓、601牛頓、603牛頓、605牛頓、610牛頓、620牛頓、630牛頓、650牛頓、700牛頓。該最末道軋延的軋延裁減率為小於1%，例如：1%、0.9%、0.8%、0.7%、0.6%、0.5%、0.4%，該最末道軋延的軋延速度可為800 mpm至900 mpm，例如：800 mpm、810 mpm、820 mpm、830 mpm、840 mpm、850 mpm、860 mpm、870 mpm、880 mpm、890 mpm、900 mpm。在一實施方式中，該連續式冷軋包含5道次連續軋延，在第5道軋延中，使用放電加工工輥對該熱軋片進行軋延，以產生表面具有粗糙度的該冷軋鋼片。Step S30: The hot-rolled sheet is continuously cold-rolled. For example, a quadruple rolling mill can be used for the continuous cold rolling. The continuous cold rolling includes multiple continuous rolling passes, wherein the hot-rolled sheet is rolled using an electro-discharge processing roller in the final rolling pass to produce a cold-rolled steel sheet with a rough surface. The roughness of the work roll of the final rolling pass is 3.7 µm to 4.7 µm, for example: 3.7 µm, 3.8 µm, 3.9 µm, 4 µm, 4.1 µm, 4.2 µm, 4.3 µm, 4.4 µm, 4.5 µm, 4.6 µm, 4.7 µm, and optionally, for example, 4.22 µm, 4.23 µm, 4.25 µm, 4.31 µm. The rolling force of the final rolling pass is 500 Newton to 700 Newton, for example, 500 Newton, 550 Newton, 600 Newton, 601 Newton, 603 Newton, 605 Newton, 610 Newton, 620 Newton, 630 Newton, 650 Newton, and 700 Newton. The final rolling reduction rate is less than 1%, for example, 1%, 0.9%, 0.8%, 0.7%, 0.6%, 0.5%, or 0.4%. The final rolling speed can be between 800 mpm and 900 mpm, for example, 800 mpm, 810 mpm, 820 mpm, 830 mpm, 840 mpm, 850 mpm, 860 mpm, 870 mpm, 880 mpm, 890 mpm, and 900 mpm. In one embodiment, the continuous cold rolling process includes five continuous rolling passes. In the fifth rolling pass, the hot rolled sheet is rolled using an electro-discharge processing roll to produce a cold rolled steel sheet having a rough surface.
在一實施方式中，在該步驟S30後，該製造冷軋鋼片的方法還包含一步驟S40：對該冷軋鋼片進行精整。較佳的，該步驟S40不包含調質軋延處理。In one embodiment, after step S30, the method for manufacturing a cold-rolled steel sheet further includes step S40: finishing the cold-rolled steel sheet. Preferably, step S40 does not include a tempering and rolling treatment.
根據本發明之一實施方式的一種透過製造冷軋鋼片的方法所製成的冷軋鋼片，包含：以該鋼材的總重量為100 wt%計，0.08 wt%至0.2 wt%的碳、0.3 wt%至0.4 wt%的錳、小於0.025 wt%的磷、小於0.025 wt%的硫、小於0.04 wt%的矽、小於0.1 wt%的銅、小於0.1 wt%的鈮、小於0.1 wt%的鉻、小於0.05 wt%的鉬，以及餘量的鐵，其中該冷軋鋼片的粗糙度大於或等於0.6 µm，該冷軋鋼片的維氏硬度係大於170。According to one embodiment of the present invention, a cold-rolled steel sheet produced by a method for producing a cold-rolled steel sheet comprises, based on 100 wt% of the total weight of the steel material, 0.08 wt% to 0.2 wt% of carbon, 0.3 wt% to 0.4 wt% of manganese, less than 0.025 wt% of phosphorus, less than 0.025 wt% of sulfur, less than 0.04 wt% of silicon, less than 0.1 wt% of copper, less than 0.1 wt% of niobium, less than 0.1 wt% of chromium, less than 0.05 wt% of molybdenum, and the remainder of iron. The cold-rolled steel sheet has a roughness greater than or equal to 0.6 µm and a Vickers hardness greater than 170.
在一實施方式中，該碳的含量為0.08 wt%至0.11 wt%。In one embodiment, the carbon content is 0.08 wt % to 0.11 wt %.
在本文中，術語「全硬板（full hard）」係指不經退火處理的鋼板，其維氏硬度（Vickers hardness）最小為170。In this article, the term "full hard" refers to unannealed steel plates with a minimum Vickers hardness of 170.
以下列舉實施例來進一步說明本發明的製造冷軋鋼片的方法，然其並非用以限定本發明，任何熟習此技術者，在不脫離本發明的精神及範圍內，當可做各種更動及潤飾。The following examples are provided to further illustrate the method for manufacturing cold-rolled steel sheets of the present invention. However, they are not intended to limit the present invention. Anyone skilled in the art may make various modifications and improvements without departing from the spirit and scope of the present invention.
下表1分別顯示了實施例以及比較例的製程中的各個參數條件，其中實施例為本發明的製造冷軋鋼片的方法，在連續式冷軋中，係透過四重式軋機進行5道次連續軋延，在第5道次中，使用放電加工（EDT, electro-discharge texturing）工輥賦予鋼材粗糙度；而比較例與實施例的製程步驟大致相同，兩者相異之處主要在於連續式冷軋的步驟，比較例係以噴砂輥替代放電加工工輥，並且因應於此差異（放電加工工輥與噴砂輥），在連續式冷軋中的各參數亦有所不同。Table 1 below shows the various process parameters for the embodiment and comparative example. The embodiment is a method for manufacturing cold-rolled steel sheet according to the present invention. In continuous cold rolling, five passes are performed using a quadruple rolling mill. In the fifth pass, an electro-discharge texturing (EDT) roll is used to impart roughness to the steel. The comparative example and the embodiment have substantially the same process steps, differing primarily in the continuous cold rolling step. The comparative example uses a sandblasting roll instead of the EDT roll. Due to this difference (EDT roll vs. sandblasting roll), the various parameters used in the continuous cold rolling process also differ.
［表1］
由表1可得知，在本實施例中，在相近的軋延力下，可維持高軋延速度，並產出具有高粗糙度（≥0.86 µm）的冷軋全硬板（即：冷軋鋼片）。As shown in Table 1, in this embodiment, a high rolling speed can be maintained under similar rolling forces, and a cold-rolled fully hard plate (i.e., cold-rolled steel sheet) with a high roughness (≥0.86 µm) can be produced.
參照圖2a及圖2b，其分別為上述之實施例以及比較例的板形平面趨勢圖，其中橫軸為鋼捲之對應長度位置，縱軸為鋼捲之對應寬度位置，I值定義為應變量測值，係板型之量化指標，I絕對值數值越大則板型越差。實施例之I值平均為-8.26，優於比較例的-12.03，表示整顆鋼捲平均板型較佳。再者，實施例的最小I值-18.41以及最大I值12.64均優於比較例的最小I值-36.76以及最大I值14.01，顯示比較例有局部板型較差區域，如圖2b中之長度位置0至400 m處，板寬中間有多處白色區塊（I值約為20），兩側則有多處深色區塊（I值約為-30）。綜上，根據圖2a及圖2b可得到發明的製造冷軋鋼片的方法所製得之鋼片可維持良好板型。Refer to Figures 2a and 2b, which show the flatness trend graphs for the aforementioned Example and Comparative Example, respectively. The horizontal axis represents the length of the coil, and the vertical axis represents the width of the coil. The I value, defined as a strain measurement, is a quantitative indicator of flatness. A larger I absolute value indicates poorer flatness. The average I value for the Example is -8.26, better than the -12.03 for the Comparative Example, indicating a better average flatness for the entire coil. Furthermore, the Example's minimum I value of -18.41 and maximum I value of 12.64 both surpassed the Comparative Example's minimum I value of -36.76 and maximum I value of 14.01, indicating that the Comparative Example has localized areas of poor flatness. For example, from 0 to 400 m in length, there are multiple white areas (I values of approximately 20) in the middle of the plate width, and multiple dark areas (I values of approximately -30) on either side. Overall, Figures 2a and 2b demonstrate that the invented method for producing cold-rolled steel sheet can maintain good flatness.
再參照圖3a、圖3b、圖4a、圖4b，其分別為上述之實施例（圖3a、圖3b）以及比較例（圖4a、圖4b）的厚度（圖3a、圖4a）暨生產速度（圖3b、圖4b）之趨勢圖，其中圖3a、圖3b、圖4a、圖4b之橫軸為鋼捲對應長度，圖3a及圖4a之縱軸為厚度，圖3b及圖4b之縱軸為生產速度。可看出在比較例中，生產速度多次變換，厚度晃動亦明顯較大，生產不穩定；反之，實施例以固定速度800 mpm以上生產，厚度晃動亦較小，可穩定提供高產量、高合格率以及高粗糙度之冷軋全硬板。Referring again to Figures 3a, 3b, 4a, and 4b, they are trend charts of thickness (Figures 3a, 4a) and production speed (Figures 3b, 4b) for the aforementioned embodiment (Figures 3a, 3b) and comparative example (Figures 4a, 4b), respectively. The horizontal axes of Figures 3a, 3b, 4a, and 4b represent the corresponding length of the steel coil, the vertical axes of Figures 3a and 4a represent thickness, and the vertical axes of Figures 3b and 4b represent production speed. It can be seen that in the comparative example, the production speed changes repeatedly, the thickness fluctuation is also significantly larger, and the production is unstable; on the contrary, the embodiment is produced at a fixed speed of more than 800 mpm, and the thickness fluctuation is also smaller, which can stably provide high production, high pass rate, and high roughness of cold-rolled full-rigid boards.
綜上所述，透過本發明的製造冷軋鋼片的方法，得以在使用低碳鋼的情況下，且無須退火調質，得到粗糙度且硬度相當於中碳鋼之硬度的冷軋鋼片，進而達到降低生產成本及簡化製程的技術效果。In summary, the method for manufacturing cold-rolled steel sheets of the present invention allows the use of low-carbon steel without annealing and tempering to produce cold-rolled steel sheets with a roughness and hardness equivalent to that of medium-carbon steel, thereby achieving the technical effects of reducing production costs and simplifying the manufacturing process.
雖然本發明已以較佳實施方式揭露，然其並非用以限制本發明，任何熟習此項技藝之人士，在不脫離本發明之精神和範圍內，當可作各種更動與修飾，因此本發明之保護範圍當視後附之申請專利範圍所界定者為準。Although the present invention has been disclosed in terms of preferred embodiments, this is not intended to limit the present invention. Anyone skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope of the attached patent application.
S01、S10至S40:本發明的製造冷軋鋼片的方法的步驟S01, S10 to S40: Steps of the method for manufacturing cold-rolled steel sheet of the present invention
圖1為是根據本發明的一實施方式的一種製造冷軋鋼片的方法的流程圖； 圖2a是根據本發明的一實施方式的一種製造冷軋鋼片的方法所製得的冷軋鋼片的板形平面趨勢圖； 圖2b是在連續式冷軋中的最末道軋延使用噴砂輥所製得的冷軋鋼片的板形平面趨勢圖； 圖3a是根據本發明的一實施方式的一種製造冷軋鋼片的方法所製得的冷軋鋼片的厚度趨勢圖； 圖3b是根據本發明的一實施方式的一種製造冷軋鋼片的方法所製得的冷軋鋼片的速度趨勢圖； 圖4a是在連續式冷軋中的最末道軋延使用噴砂輥所製得的冷軋鋼片的厚度趨勢圖；以及 圖4b是在連續式冷軋中的最末道軋延使用噴砂輥所製得的冷軋鋼片的速度趨勢圖。 Figure 1 is a flow chart of a method for manufacturing cold-rolled steel sheets according to an embodiment of the present invention; Figure 2a is a planar trend diagram of the plate shape of a cold-rolled steel sheet produced by the method for manufacturing cold-rolled steel sheets according to an embodiment of the present invention; Figure 2b is a planar trend diagram of the plate shape of a cold-rolled steel sheet produced using a sandblasting roll in the final rolling pass of continuous cold rolling; Figure 3a is a thickness trend diagram of a cold-rolled steel sheet produced by the method for manufacturing cold-rolled steel sheets according to an embodiment of the present invention; Figure 3b is a speed trend diagram of a cold-rolled steel sheet produced by the method for manufacturing cold-rolled steel sheets according to an embodiment of the present invention; Figure 4a shows the thickness trend of a cold-rolled steel sheet produced using a sandblasting roll in the final rolling pass of a continuous cold rolling process; and Figure 4b shows the speed trend of a cold-rolled steel sheet produced using a sandblasting roll in the final rolling pass of a continuous cold rolling process.
S01、S10至S40:本發明的製造冷軋鋼片的方法的步驟S01, S10 to S40: Steps of the method for manufacturing cold-rolled steel sheet of the present invention
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