TW420719B - Ferritic stainless steel sheet having less planar anisotropy and excellent anti-ridging characteristics and its manufacturing method - Google Patents

Abstract

Accordingly to the disclosed invention, a ferritic stainless steel sheet is provided with both excellent working production characteristics and less planar anisotropy and excellent anti-ridging characteristics. Otherwise, according to the disclosed invention, a ferritic stainless steel sheet is provided with not less than 30% of ductility, not less than 1.4 of r value, not more than 2.0 % of <delta>EI in planar anisotropy ductility, not more than 0.2 of <delta>r in planar anisotropy of r value, and not more than 10 mu m of anti-ridging characteristics capably worked out. Because the disclosed invention may provide the ferritic stainless steel sheet to be used to the component of stainless steel sheet, which made of austenite steel material in the part, it is a tremendous contribution and value to industry.

Description

42ύ713 ______ Β7_ V. Description of the Invention (1) [Technical Field of the Invention] The present invention relates to a ferrous iron-based stainless steel plate that is suitable for use in kitchen appliances, chemical equipment, water storage tanks, etc., and in particular, the in-plane anisotropy is Small ferrous stainless steel plate with good wrinkle resistance (hereinafter, steel strip is also included) and its manufacturing method. [Advanced technology] Stainless steel plates are widely used in building decoration materials, kitchen appliances, chemical equipment, and water storage tanks because of their flat surface and good corrosion resistance. In particular, Vostian iron-based stainless steels are superior to ferritic iron-based stainless steels due to various characteristics such as press formability, ductility, and even wrinkle resistance, so they are used in a wide range of applications. Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs (Read the notes on the back and then fill out this page). Also, in recent years, the progress of high-purity steel technology in the steel manufacturing process has improved the forming characteristics. The high-purity and high-corrosion-resistant ferritic iron-based steel sheet is used for applications of Vostian iron-based stainless steel that have conventionally used SUS 304, SUS 3 1 6. The characteristics of the ferritic iron-based stainless steel, such as the low sensitivity to stress corrosion cracking, have the advantage of being cheap because they do not contain high-priced Ni, and have been known. However, the ferritic iron-based stainless steel is inferior in terms of 'formability' and particularly inferior in elongation with respect to Vosstian iron-based stainless steel, and is therefore mainly used as a durable consumable material that values corrosion resistance. Therefore, in order to further expand the use of ferrous iron-based stainless steel ', it is necessary to improve in-plane anisotropy and further improve workability. However, 'In order to improve the formability of ferrous stainless steel, in the past, the paper was reduced and the Chinese National Standard (CNS) A4 specification (210X297 mm) was applied -4 1M 19 Α7 Β7 5. Description of the invention (2) (C + N) The method is known. Further, in Japanese Patent Laid-Open No. Sho. 5-6 to 1 2 3 3 2 7, a technology for optimizing reduction ratios or firing conditions for steels containing carbonitride stabilizers added with Nb has been disclosed. In Japanese Patent Laid-Open Nos. 3-2, 6 and 4 6 52, the addition of carbonitride-forming elements such as T i and nb controls the aggregate structure to increase the X-ray integral intensity ratio (2 2 2) / (2 0 0), and techniques for improving formability such as the Lank ford value have been disclosed.

In Japanese Patent Laid-Open Publication No. 5 4-11 7 7 0, a technique for improving cold workability by adding T i while reducing N has been disclosed. [Problems to be Solved by the Invention] However, these problems have been solved in the past. The main purpose of the known technology is to increase the r value and extensibility. With regard to the effects of the improvement of these characteristics, there are problems that the anisotropy in the plane is large, or the wrinkle resistance is incomplete. Therefore, the use of deep processing such as stamping, etc. / from the viewpoint of aesthetics, reduction of friction load, etc., is to strongly improve the in-plane anisotropy and wrinkle resistance. Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs — 1-- ϋ 1 ^ 1 ml I 1 -i-n-/ \-(Please read the precautions on the back before filling this page) The purpose of this invention is In order to solve the above-mentioned known problems, a ferrous iron-based stainless steel plate with good wrinkle resistance and a manufacturing method thereof are provided. In addition, another object of the present invention is to provide an in-plane anisotropy of an r-value other than an r-value of 1.4 or more and an extension of 30% or more. Δ! Is an in-plane anisotropy of 0 or less and 2 or less. △ EI is 2.0% or less, 尙 Fat-grained iron stainless steel plate with wrinkle resistance (details described below) of 10 M m or less and its manufacturing method "The paper size applies to Chinese National Standard (CNS) A4 Specifications (210 '乂 297mm) -5-420719 A7 ____B7_ V. Description of the invention _ (3)' [Means to solve the problem, means] ·, the inventor. The result of careful research in order to achieve the above purpose, the fertilizer The chemical composition, rolling conditions, and firing conditions of the granular iron-based stainless steel plate are appropriately adjusted, and the formation of the aggregate structure unique to the stainless steel plate is controlled. It was found that the above-mentioned object can be achieved, and the present invention has been completed. That is, the main composition of the present invention is as follows (1), which is characterized by containing: c: 0.02wt% or less, S i: 1.0% by weight or less, Μ η:, Γ · 〇wt% or less, P: 0_ 08wt% or less , S: 0 _ 〇1 wt% or less, 1 '

Aj ?: 30% by weight or less,

Cr: 1 l ~ g〇wt% or less,

Mo: .5.wt% or less, N: 0.03wt% or less Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (Read the precautions on the back before filling out this page) and C and N meet 0.00005 passengers (C 十 N ) 〇〇. 〇3wt%, and (C / N) &lt; 0.6 relationship, Ti satisfies the relationship of each 5 Ti / (C + N) guest 30, the remaining part is F e and unavoidable

I X-ray integrated intensity ratio (222) / (310) formed on the plane parallel to the plate surface at the same time. The surface anisotropy is small and has a good 35 at 1/4 of the plate thickness. Method for producing wrinkle-resistant ferrous iron-based stainless steel plate. This paper size applies the Chinese National Standard (CNS) (21GX297 mm): '-6-1 4; ς 〇19 Α7 Β7 V. Description of the invention (4) (2) Its characteristics are C: 0.02 Si: 1. 0 w Μ η: 1 · 〇w Ρ: 0.08 S: 0.01 A 芡: 0 · 3 0 C r: 1 1 to 5 Contains: wt% t% to t% to wt% wt% wt% 0 wtt% to wt % 0 5 ^ .6 system, the remaining plate surface) plate integration strength of ± 40 or more plate. : It lies below, below, below, below, below, below, below, and below (the degree ratio of the parallel thickness of the remainder of the C relationship is% by the surface L ----.--- L-{'' 黎-{谙 先 敏 读Note on the back, please fill in this page again.) Order the M OON printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs: and C and Ν, and (CC + Ν) pure form 2 2 2), and then the thickness of the plate There are platelet-shaped fertilizer grains (3 4 0% rolling with C: S i: 5.0 .0 w 0.03 satisfies 0 · 0 / N) &lt; 0 S 3 0 Guan Cheng, at the same time / (310 in The aforementioned X-ray average thickness of 80% iron-based stainless steel) is characterized by the above, and the fineness is 0.02: 1.0 w + N) SO. 03wt% 'T i satisfies 5 ST i / (divided by F e And unavoidable @ ® & X-ray integral intensity ratio (1/4 thickness position is .3 5 in the plate thickness direction length in the area within (2 2 2) / (3 1 0) is small And the final rolling reduction rate of the good anti-wrinkle rough rolling is the final temperature below 750 ° C, the thermal weight% below t%, and the paper size applies the Chinese National Standard (CNS) A4 specification (210 × 297 mm). 420719 _ Please file aB and month to amend B7 V. Description of the invention (5) Toi Μη of each year: 1. Owt% or less · --- Ordered by the Ministry of Economic Affairs, Central Government Standards Co., Ltd. 印 P • 0 * 0 8 W t% or less, S; 0 • '0 1 W t% or less «A; 0 * 3 0 W t% or less' C Γ ·· 1 1 5 0 wt% or less &gt; Μ 0 ·· 5 • 0 W t% Below, Ν: 0 * 0 3 W 't% or less and C and N satisfy 0 • 0 0 5 ^ (c + N) 0 • 0 3 W t% and (C / Ν) &lt; 0 • 6 relationship, The in-plane anisotropy of the hot-rolled plate obtained by T i satisfying the relationship of 5 T i / (C + N) 3 0, followed by hot-rolled plate cold forging, cold rolling, and fine firing is Method 9 (4) for the production of small, good-grained ferritic iron-based stainless steel plates, characterized by the final rolling reduction of 40% or more * in the final rolling and the fine fin finishing temperature Below 7 5 ac &gt; Yes c; 0 * 0 2 W t% or less si; 1 * 0 W t% or less, Μ η ·· 1 • 0 W t% or less, P: 0-0 8 wt% or less% s 0 • 0 1 wt% The following A i? 0 • 3 0 wt% or less cr 1 1 5 0 wt% or less * M 0 5 • 0 W t% or less * N: 0 0 3 wt% or less This paper is universal t «National Standard (CNS ) A4Jit pile (210 × 297 mm) Please read the precautions on the back before p. ^ 〇) Λν, ρ

V. Description of the invention (δ) and C and N satisfying the relationship of 0.005 Mn (C + N) SO. 〇3wt% and (C / N) &lt; 0.6 · Ti satisfies 5 彡 Ti / (C + N) S 3 0 · Relationship steel material, and at the 1/4 thickness position of the plate thickness, the X-ray integral intensity ratio of the parallel surface of the plate surface (2 2 2) / (3 1 0) is 3 A method for producing a ferritic stainless steel plate with a hot-rolled sheet below 0, followed by hot forging, cold rolling and finish forging. The structure of the structure can be understood in the following detailed description. [Simplified description of the drawing] Figure 1 is a graph showing the relationship between in-plane anisotropy and C / N. 9) Figure is a plane. Graphic of the relationship between the internal anisotropy and the integral intensity ratio of the X-ray [α = (222) / (310)] Ikitf sets the third figure as the length in the thickness direction of the area existing within the range of ± 40% of the average value in the thickness direction of the X. line integral intensity ratio [α = (2 2 2) / (3 1 0), Represents the ratio of occupied plate thickness The graph of the relationship of anisotropy in the plane. Figure 4 is a plate existing in the area within ± 40% of the average value of the plate thickness direction of the X-ray integrated intensity ratio [(2 2 2) / (3 1 〇) The length in the thickness direction, a diagram illustrating the method for obtaining the ratio of occupied plate thickness, [Detailed description of the invention] _ This paper is a universal t-size standard (CNS) A4At grid (210. × 297 mm) -9-A / B7 420719 V. Description of the invention (7) Secondly, the present invention will be described in detail with limited reasons. C: 0.02 wt% or less {Please read the precautions on the back before filling this page) C Generally, it is to reduce r value And extension at the same time 'is an element harmful to corrosion resistance. If the value exceeds 0.02 wt%, its adverse effect is particularly significant, so it is 0.02 wt% or less. However, the ideal content is not more than 0.005 wt%.

Si: 1.0 wt% or less Si is an effective element for deacidification, but excessive addition will cause a decrease in cold processability and a decrease in elongation, so the addition range is 1.0 wt% or less. However, the ideal content is 0.3 to 0.5 wt%.

Mn: 1.0 wt% or less Mn is an effective element for the precipitation and fixation of S existing in steel to maintain the hot rolling property. However, excessive addition may result in a decrease in the processability or corrosion resistance. It is reduced to 1.0 wt% or less, and desirably 0.5 wt% or less. P: 0.08wt% or less Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs P is a harmful element that reduces thermal processability and degrades mechanical properties. If the content exceeds 0.8 wt%, the effect is particularly significant. Therefore, the content is preferably 0.8 wt% or less, and preferably 0.4 wt% or less. S: 0. Olwt% or less S is a harmful element that forms Mn S in combination with Mη and becomes the starting point of initial rust. It also segregates at the grain boundary and promotes brittleness of the grain boundary. S Contains this paper size Applicable to Chinese National Standard (CNS) A4 specification (210 × 297 mm) -1 η 10 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs 420719 A7 __B7 ___ V. Description of invention (8). The quantity exceeds O .Olwt% has a significant effect, so it is 0.01.wt% or less' ideally 0. 06 wt% or less. Αβ: 0.30% by weight or less. A is an effective element for deacidification. However, the excessive addition is caused by the increase of Aj? -Based intermediary substances and causes surface damage, so it is 0.30% by weight or less. Preferably, it is in a range of 0.10 wt% or less. Cr: 11 to 50 wt% Cr is an indispensable element for improving corrosion resistance. If the amount is less than 1 1 wt%, it will not be able to obtain very good corrosion resistance, and if it exceeds 50 wt%, adding it will reduce the hot and cold processability. Therefore, the addition range is 1 1 to 50 wt%. , Ideally 1 1 ~ 35wt%. Mo: 5.0% by weight or less Μ〇 is an effective element for improving corrosion resistance and recording resistance, but when it exceeds 5.0% by weight, it not only saturates these effects, but also promotes the precipitation of σ phase or 7 phase, making it Decrease in corrosion resistance or processability, so that it is added in a range of 5.0 wt% or less. However, in order to obtain the effect of Μ 〇, it is desirable to add at least 0 -1 wt%. N: 0.03 wt% or less N is the same as C to reduce the r value and elongation. With the formation of C r nitride Since the de-Cr layer is generated, the element is harmful to the corrosion resistance. In particular, the effect is significant when it exceeds 0. 0 3 w t%, so it is preferably 0.03 wt% or less', and ideally, it is 0.01 wt% or less. —Ln · HL · 1 ^ 1 In .1 n ^ i-(Read the precautions on the back before filling in this page) The size of the paper is applicable to China National Standard (CNS) A4 (210X297mm) 719 719 Ministry of Economic Affairs Printed by the Consumer Standards Cooperative of the Central Bureau of Standards A7 B7 V. Description of the Invention (9) 005S (C + N) SO. 03wt%, (C / N) &lt; 〇. 6 C and N are as described above, for r Value, elongation, and corrosion resistance all have an adverse effect. If the total amount of these exceeds 0.03 wt%, the effects are also significant. On the other hand, if C and N are extremely reduced, and the total amount is less than 〇 .. '〇 〇 5 .w_ t%, it will promote the preferential growth of crystal grains, and it is difficult to control the aggregate structure and reduce the wrinkle resistance. Therefore, the C and N content must satisfy 0.005S (C + N) $ 0.30% by weight. In addition, the inventors found that the weight ratio of C to N (C / N) greatly affects the aggregate organization. When (C / N) is less than 0.6, the value of the X-ray integral intensity ratio (2 2 2) to (3 1 0) (2 2 2) / (3 Γ〇.) Is increased (hereinafter, expressed as α) , While improving the r value and extension, the in-plane anisotropy becomes smaller. Therefore, the contents of C and N must also satisfy the relationship of (C / N) &lt; 0.6. Fig. 1 is a graph showing that C + N is 0. 0 0 8 0 to 0 200 wt%, Ti / (C + N) is 10 to 19, and other elements are steel plates within the scope of the present invention. The relationship between anisotropy (the fg method is the same as the method described later) and C / N. It is known from the second figure that in order to reduce the in-plane anisotropy, it is necessary to make the C / N less than 0.6 ° 5 ^ Ti / (C + N ') ^ 30 This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ----- r ---- ^-install --------- order- (Please read the precautions on the back before filling in this page) -12-• ^ 0719 A7 ___ _B7_ V. Description of the invention (10). T i is a carbon nitride forming element, an effective element for suppressing the precipitation of cr carbon nitride grain boundaries during welding or heat treatment, and for improving the corrosion resistance. In addition, solid solution C and N in the fixed steel are effective elements for controlling the aggregate structure and improving workability as carbonitrides. These effects are based on the weight ratio of _ (C + N), which makes it Ti / (C + N). When it is less than 5, it is not obtained, and when it exceeds 30, adding this value makes it reduce these characteristics. . Therefore, the relationship between T i and C and N must satisfy 5STi / (C + N) $ 30. In addition to the above component elements, one or more groups can be selected from the following three groups as required, and one or three or more types can be added from the selected group. ① Ca: 0.0050wt% or less ② Nb: 0.0100wt% or less, B: 0.0020wt% or less ③ Cu: 2.0wt% or less, Ni: 2.0 wt% or less

Ca: 0.0050wt% or less <Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs (Please read the precautions on the back before filling this page) C a is an effective control caused by the T i in the steel casting Element of the nozzle. However, excessive addition may cause rusting or embrittlement failure with a Ca-based intermediary as a starting point, so add it in the range of 0.0050 wt% or less. ’

Nb: 0.001% by weight or less. Nb is a carbonitride-forming element, and has improved contact resistance and processability, and particularly effectively improved in-plane anisotropy of mechanical properties. However, if the paper size exceeds the Chinese national standard (CNS> A4 size (210X297mm) -13-A7 B7), it will increase the recrystallization and decrease the saturation, so the upper limit of the amount of addition is set to steel. It is expected that minute carbides will be produced in order to obtain the effect of in-plane anisotropy improvement in the range of 0% or more. 0 wt% or less. The grain boundary is improved to increase the secondary processing brittleness in the steel, which reduces workability. Therefore, it is added in the following range. However, the ideal range is 0 0 0 0 wt%. Elements with an acid corrosion resistance and anti-interstitial corrosion resistance below t% increase the pits at the starting point of rust to improve the rust resistance or The effective element of the corrosion resistance of the use of kitchen appliances will have adverse effects such as high temperature cracking, etc., which is less than 0. wt%. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (11) Over 0. Olwt % And its effect leads to workability of 0.01 wt%. However, it is added to the fineness of crystal grains, and 0. 0 3 wt. B: 0. 0 0 2 B is an effective element for precipitating crystals. However, adding 0 · 0 0 2 0 W t% 〇 · 0 0 0 3 0. C u: 2.0 w C u is an improvement pair. In addition, it has the effect of controlling production and improving the quality of building materials. However, the excessive addition is set to the addition range of 2. However, in order to increase 0. Olwt% or more N i: 2. 0 w N i: It is also an effective element. In addition, it has the effect of rust control and enhances the building element. However, the addition range is set to (please read the precautions on the back before filling this page) Corrosion resistance. Therefore, it is expected that the amount of Cu + N i is less than 0%. For acid corrosion resistance and anti-interstitial corrosion resistance, corrosion holes produced by rusting starting points can be grown to improve the resistance to materials or kitchen appliances. The effective addition of the corrosion resistance will cause adverse effects such as high temperature cracking, below 2.0 wt%. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm)

V. Description of the invention ΐ l2) In the Ministry of Economic Affairs, a sample of the quasi-station XB Cooperative Consumers ¾ However, in order to improve the corrosion resistance • Therefore, it is expected that (: 11 + \ [the amount is 0 · 0 1 wt% above β X-ray Integral strength, degree ratio: α = (222) / (310) Increase the χ-line integral intensity ratio α of the plane parallel to the plate surface of the rolled steel sheet (details will be described later), so as not to impair the r value and extend or △ Ε Ι is formed as an index to reduce in-plane anisotropy. * In order to obtain these effects, first of all, the state of the hot-rolled plate is obtained, and the α value of the position of the thickness in the thickness direction I〆4 is controlled to be more than 30. Aggregate-structured hot-rolled sheet 'Given hot-rolled sheet forging, cold rolling, and cold-rolled sheet forging' Finally 'can be made in the thickness direction 1 / 4 thickness of the position of the α value is controlled to more than 3 5 fat iron-based stainless steel sheet * Figure 2 is to change the conditions of hot extension * burning • cold extension conditions c ten N is 0. 0080 ~ 0. 0200 wt % 'C / N is 0.1 to 3.0 Ti / (C + N) is 1 0 to 1 9' The in-plane anisotropy of the cold-rolled steel sheet whose other elements are within the scope of the present invention (measurement method & @ For and after The method is the same) and the relationship with the 1/4 thickness of the cold-rolled sheet. "In order to reduce the in-plane anisotropy from Figure 2", it is necessary to control the α of the cold-rolled sheet to more than 35%. Ideally, Controlled at 7 5 or more β However, the position where the X-ray integrated intensity ratio α is measured as the position of 1/4 thickness in the plate thickness direction has a good relationship with the anisotropy in the plane. It is the most appropriate to represent the entire steel plate. In addition, the value of the integrated X-ray intensity ratio α mentioned above is added, and it is known that there is not much difference in the thickness distribution of α in the plane parallel to the plane, and the paper Λ scale is appropriate. National Standards for Distressed Countries (CNS) M is now available (2 丨 0 公 297mm) _ (Please read the notes on the back before rolling the rt page) 襞. Order -15-420719 a? ^ ___ _B7 _ ^ _ V. Description of the invention 丨 I3) It is uniform and tends to keep the anisotropy in the plane smaller. Fig. 3 is a steel plate with a value of α of the thickness of 1/4 of the cold-rolled sheet at a value of 50 to 130. The α is measured in the direction of the plate thickness to obtain the value of each plate thickness position. The ratio of the plate thickness in the plate thickness direction length (thickness) in the area of 40% of the average plate thickness direction α represents the relationship between this ratio and the in-plane anisotropy. A specific calculation method of the value of the X-ray integrated intensity ratio α. First, in the direction of the thickness of the plate, for example, when the measurement interval is 1 〇 0 V m or less, or the measurement point is 30 or more, the α value at each position is measured to obtain the distribution curve in the thickness direction, and the distribution curve is integrated in the thickness direction. The plate thickness B is obtained by excluding this integral value to obtain an average value in the plate thickness direction of the X-ray integrated intensity ratio α. Next, find the thickness direction length of the area that is within ± 40% of the average value (the total length of the lines in the figure: A 1 + A 2), and the ratio to the thickness {(Al + A2 ) / B) x 100%. Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs (谙 Please read the precautions on the back and then fill out this page). From Figure 3, we know that the X-ray integral intensity ratio α obtained in this way is the average value in the thickness direction. The length in the plate thickness direction of the area within ± 40% makes it more than 80% of the plate thickness, thus reducing the in-plane anisotropy. The manufacturing process of the steel sheet of the present invention is to melt the steel composed of the above components by a converter, an electric furnace, and the like, and then use continuous casting or agglomeration to form the steel sheet. The method of pickling-cold rolling-finishing-forging (pickling) is sufficient. Hereinafter, these processes will be described in detail. The hot rolled calender scale is applicable to the Chinese National Standard (Oyang) 8-4 specifications (210 mm 297 mm) -16-Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 420719 at _____: _B7 _.___ V. Description of the Invention (M) The reduction ratio of the hot rolling is closely related to the division of the band-shaped fertilizer iron which is considered to be the cause of wrinkle formation. In particular, since the rolling reduction rate of the last pass of the rough rolling is increased to more than 40%, the strip-shaped fertilizer grains are broken while the deformation in the thickness direction is uniform, and the crystallization caused by static recrystallization is effectively achieved. Grain refinement. In addition, the lower the final rolling temperature of the fine rolling is, the same as the rolling reduction of the rough rolling described above, because the rolling deformation remains, which is beneficial to the uniformity, miniaturization, and equiaxing of crystal grains in the thickness direction. In particular, since the end temperature is set to 75 ° C or higher, the above-mentioned effect is increased to 75 ° C. However, if the final temperature is less than 600 ° C, surface defects are prone to occur. Since the productivity is lowered, the lower limit temperature is preferably set to 60 ° C. In addition, in the hot-pressing time delay in the above-mentioned low-temperature region, uniform deformation is added in the thickness direction due to the application of lubrication, and it is desirable to achieve 'static' crystals caused by accelerating deformation accumulation. Hot-rolled plate forging Forging conditions of hot-rolled plate are to affect wrinkling. If the hot forging temperature of the hot-rolled sheet is too low, band-shaped wrinkles will be generated. On the other hand, if the temperature is too low, the surface will crack and damage the appearance of the surface. Therefore, the calcining temperature is in the range of 900 ° C to ‘1 100 ° C, and the range of 975 ° C to 1050 ° C is ideal. However, the firing time period ranges from 5 seconds to 4 minutes. Cold rolling reduction. The reduction ratio of cold rolling is to affect wrinkle, r value, and surface anisotropy. Increasing the reduction ratio of cold rolling will increase the r value and wrinkle resistance. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -___ 5 _____ t5 -______ ► In'm ^^^ 1 — ^ 1 · In ί. Ί * ^ yv · m ^ i 1 ^ 1 nn HI ^ (谙 Please read the notes on the back before filling this page)-17 _ A7 B7 AO r \ ^ ^ / -¾ i. I9 V. Invention Note (15) reduce in-plane anisotropy. Because of these points, the reduction ratio must be 60% or more ', but exceeding 95% will reduce these characteristics', so the reduction ratio for cold rolling may be in the range of 60 to 95%. Calcining and forging Calcining and forging of a cold-rolled sheet is indispensable for ensuring equiaxed and uniform crystal grains and mechanical properties. The temperature range of the calcination and forging is from 8 3 0 to 9 5 0 t: that is, the range of the holding time is preferably from 3 seconds to 1 minute. [Examples] Hereinafter, specific examples will be described. The steel having the chemical composition shown in Table 1 (1, 2) was melted in a converter and secondary refining to form a slurry, and then added to 1 250. (: After that, rough rolling with 4 passes and fine rolling with 7 passes are used for hot rolling. Hot rolling is forging this hot rolled plate (holding time: 1 minute. Minutes.), Cold rolling after pickling, and then fine forging. (Holding time: 30 seconds), it becomes a cold-rolled steel sheet with a thickness of 0.6 mm. Using the cold-rolled steel sheet obtained by the above method as a sample, the X-ray integrated intensity ratio is obtained by X-ray reversal for the thickness of the 1/4 thickness position Simultaneously with α, elongation (E I), deep formability (r value), and Δ EI, Δ r, wrinkle resistance, and stretch_formability (eccentricity value) are measured. In addition, the occupancy is determined by the method described above. The ratio of the plate thickness in the plate thickness direction area within the range of ± 40% of the average value in the plate thickness direction of α. Furthermore, this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) &lt; 谙(Read the notes on the back before filling out this page)

Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs -18-42s 719 A7 B7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs V. Invention Description (16) 'In order to investigate the collective organization of hot-rolled plates, the plate thickness was also measured 1/4. Α of thickness position. The results are shown in Table 3. Furthermore, some of the steels in Table 1 are manufactured under the conditions shown in Table 2 and combined with the same method as in Table 4 in the same manner as described above to produce a cold-rolled steel sheet having a thickness of λ 0.6 mra. The test results of these steel plates are shown in Table 4. f However, the method for measuring each of the above properties is the following method. • EL, Z \ EI, r value, △! · The rolling direction from the steel sheet is 45 for the rolling direction. The direction is 90 for the rolling direction. In each direction, the elongation at break was measured from each tensile test using JIS No. 13 test piece ', and E I and Δ E I were determined by the following formulas. EI = (EIl + 2EId + EIt) / 4 △ EI = (E Il-2E Id + E It) / 2 E IL, E Id, and E IT respectively indicate the rolling direction. For the rolling direction of 45 °, for rolling The direction is 90. The direction of the break extends. Similarly, in the JIS 1 No. 3 B test taken from each direction, check #, and measure the ratio of the lateral deformation to the thickness of the plate when the uniaxial tension is added in the range of 5 to 15%. Lank ford value: The r value and Δ r are obtained by the following formula. This paper size applies the Chinese National Standard (CNS) A4 specification (2.10X297 mm)-(Read the notes on the back and then fill out this page). Binding · Booking-19-V. Description of the invention (17) r = ( rL + 2rD + rT) / 4 Δ r = (rl — 2 r D + r τ) / 2 rL, rD and the rolling direction respectively, the rolling direction at 45 ° for the rolling direction, and the direction at 90 ° for the rolling direction Lank fordvalue. * Eccentricity value ′ Measured by applying graphite grease with J I s Z 2 2 4 7 as a standard. • Ripple height The wrinkle height is the height of the wave determined from the results of the initiation of the tensile test using a roughness meter in the tensile direction and the vertical direction. Printed (read the precautions on the back and then fill out this page). The value is a wet type 6 0 0 fine grinding test: ί IS No. 5 tensile test piece, and then controlled at 20% of room temperature to stretch, and use a thickness meter to determine the wrinkle occurred in the direction of stretching and vertical direction, from The average value is determined. From these results, it is understood that the composition and production conditions are appropriately tailored to control the α value of the cold-rolled sheet, except that EI is 30% or more, · △ Ε I is 2 · 0% or less, and the r value is 1.4. When the above, △! · Is -0.2 or less, and the eccentric value is · 1 or more, in addition to the good forming processability with a lifting height of 10 μm or less, the plane anisotropy is small and good Wrinkle-resistant ferrous iron-based stainless steel plate. this! The scale is applicable to China National Standards (CNS) Α4 specification (210X297 mm) '-20-Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economics B7 V. Invention Description (IS) oi CO h3 i »m4 — s &lt; JD oo ^ 4 0¾ CJ1 Λ · CO N3 first instance § f = &gt; C5 sf = &gt; sound &lt; r &gt; o CO s P o oo C3 g OJ C3 § CD § U1 c &gt; G &gt; cn 1 C3 8 C3 three OO G &gt; g ro fp G &gt; CO ο CD • Μ · * Ο p &gt; mh4 P &gt; uS p &gt; one &lt; k .〇 In3 f = &gt; § F3 sog F &gt; af = &gt; 3 5 o mm ^ P s cp CD S User C2 &gt; ps c &gt; k cr &gt; cr &gt; 03 obc = &gt; a G &gt; b P &gt; &lt; = »is R CO G? Is F9 ro cn w Ο § § o C3 s cn p &gt; o 辁 oo os cn OS U5 o § f = &gt; § f = &gt; § F &gt; o CD§ CD § p &gt; s cn g &lt; = &gt; g ro &lt; =? N3 CD i P 1 fZ &gt; 1 c &gt; o Valley P § C3 1 R 1 f = &gt; s 8 N5 § F5 o CD fS3 os oo CD ri CO CD oo &lt; r \ • M * ll $ CJ1 FS Ca &gt; r4 cn «« A r * J CO OO C3 U1 o C: i: CJ1 C3 CO CiJ C; s • o 〇 &gt; 〇5 g? 1 ~ »· * SCO; o 2, cn 3 = 5 = · s 〇 &gt; s. f = &gt; «Μ · * · »_ * CD sf = &gt; 〇§ P g F * so § 5 = &gt; i c &gt; a C3 s $ = &gt; mmJi · 〇S &gt; so 0¾ c &gt; &lt; = s P b ro § ok CO P g cn f = &gt; 5 F * PS o § p JS R mmJk g 5 = &gt; S -H f = &gt; i • o CD pi sg CD CD g CO o S cn F »g σί og 00 O o § P § f = &gt; oi § PQ o CO P g oo 2: s · 〇CD C &gt; g F * Cd to 〇§ CO oh CO P os C3 CD ro F &gt; oc〇F * s P i PSP § o &lt; m4 os 4 is will &lt; z &gt; hgp CO p &gt; a P s F &gt; s c &gt; sgm * »s F» S F &gt; g J »ho ro o ss po N3 C§ h? Oo &? s ω gg p. b P &gt; no g —H &gt; I C3 CS of = &gt; 2 C5 CD cn &lt; r &gt; i G &gt; g 0 1 5 = s cn · 〇CD &lt; = &gt; i P ip G &gt; 9 c &gt; i P igf = * § o cz &gt; o § CD § f = &gt; g tn 1 Cd § p &gt; g 1 P § · ◦ C3 § 1 1 · 〇§ 1 P CD s 1 ff £? G F &gt; g Cn og C3 C3 g 1 〇g 1 · ◦ § i = &gt; g OJ f = &gt; g --Jk 1 f = &gt; i CO P g ι &lt; 4 F &gt; &lt; 〇 o 1 gg p &gt; g ΓΟ f = &gt; S CO 1 1 P &gt; g ro 1 C3 c = &gt; i 1 • ogo 1 c &gt; go cr &gt; § P g 1 CO 1 1 1 1 1 Ί 1 1 1 1 1 1 1 1 1? 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 5 = m 〇 &gt; Bismuth U &gt; »K &gt; M. m D &gt; w &gt;. !! &amp; i D &gt; Avoid porphyry m Charm knot mi 1 m Spirit I Spirit 1 I Porcine mm Porcine avoidance m [_1] (Ϊ) {Please read the precautions on the back before filling this page) This paper size applies Chinese national standards ( CNS) A4 size (210X297 mm) -21-4 nx

7 7 AB V. Description of Invention (19) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs p〇CO K5 s? Ϋ́ FS s 〇5 σ &gt; 1 i C3 g C * J &lt; = &gt; g, p &gt; g C3 g CO ο C3 s P g CD sound C3 i P o OJ era S s CO · 〇S ο &lt; r &gt; C3 cn g · ◦ C3 S C5 oo oo • C a • C5 __ 袅 P 〇1 C5 8 cs mA P s F &gt; g S CO C3 5 = 3 CO cr &gt; K f = &gt; w cz &gt; Zr \ · 〇oo F &gt; turn cz &gt; 0 £ P s R δ f = &gt; Sd era Ρ S OO w Ο § § ps CO C3 S CO os to CD o IS3 CD s PS cn € = &gt; cn R C3 £ 3 o § F = * o iS «〇tn c =» &quot; OC /) CD C5 S C2i 8 ΓΌ o § C5 CZJ ro c? g CD 〇P s CO oos P o S c &gt; § i Ρ »§ c &gt; s ro • os CO CO ··· * r- *-'P ° po CO? CO &lt; · 〇oo m ^ L · po ·· —A oo · * »« cn rva o CO mm * un • A cn £ 5 s cn «Μ * 5ϊ δ mvA cri ί» 袅 wi = &gt; SI cs &gt; I p &gt; gos C £ 3 F5 2 ut C3 ω F3 § CD s CO § f = &gt; § c? S p O C3 h &gt;: P § f = &gt; CaJ CD 03 oo 〇 5 f = &gt; S C3 PS 5 = »2 &lt; = &gt; ss P ro oo 5» Mi. g R C3 o S n c & g t; § F5 CD CO C3 g &lt; JD F &gt; g P § to CD &lt; 〇s Q § C3 〇CJ) i = &gt; § § g oo POP 1 c &gt; § z: P o • CD C3 N3 C3 CO • C3 i C3 o CO CD 〇F &gt; 2 C3 &lt; = &gt; o ca P 2 CSt &lt; = &gt; F &gt; o nmnK P i 〇i 〇§ o go to c &gt; o5 PC = &gt; k C3 k cs :: ok · 〇 & C3 h P * H} oS--CD is C3 s 矣 Is § stuffy gog «-Α b Un * § rs P〇oo« wA mm-Λ • —4 c = &gt; sound sg CO h Ώ r! &gt; if = &gt; c = &gt; 〇 &gt; g -4 c &gt; g F &gt; o § CD g OO .〇1 pg tn P go § 0 1 P o —4 C5 i P 2 〇1 P * § cn R g § C3 1 G &gt; g § oo § 1 1 1 1 g & f = &gt; gi 8 Ϊ K 1 F &gt; o § § CO 1 1 go 1 1 1 1 o 8 waA CO C9 § CO · ◦ g OO o § §? 1 • og C3 § CO 1 p &gt; § hO 1 1 1 1 &lt; z &gt; Q i P gf = * g oo • og ΟΊ f = &gt; i CO ro 1 5 = &gt; PSF »M * • Mk 1 1 p M * 1 P & 1 1 1 1 1 9 1 ca S ps 1 1 f = * s P on 1 I 1 1 1 1 2: w D &gt; m S3 [Pi ms ni &gt; M m 〇t &gt; Charm 〇t &gt; net tear porch 〇 &gt; £ im D &gt; mm & 〇 &gt; m D &gt; m Lingling * (Please read the precautions on the back before filling this page) This paper size applies the Chinese National Standard (CMS) A4 specification (210X297 mm) 22 ·! Ο /··，.J »A CV / 1 $ Central of the Ministry of Economy Printed by the Consumer Bureau of Standards Bureau A7 B7 V. Description of the invention (2〇) [Table y 1! Last pass reduction rate of coarse calendar extension (%) Fine rolling hot rolled sheet final temperature forging temperature (° 〇1 (° 〇 Cold rolling 1 Total reduction / (%) Fine forging 'Temperature (° C) Remarks 1 4 3 7 2 1 1048 8 5 9 2 0 Suitable method 2 3 0 7 2 5 1045 8 5 9 2 0 3 4 5 8 1 0 1040 8 5 9 15 4 3 0 8 2 2 1040 8 5 9 0 0 5 4 5 7 3 0 '' 850 8 5 9 10 6 4 3 7 2 1 1115 8 5 9 丨 5 went to 4 7 7 3 8 1022 8 5 8 0 0 mm 8 "7 0 0 1030 7 5 9 8 0 Carving method 9 2 5 7 9 8 1000 8 5 9 0 5 Ajm 10 4 5 6 8 0 1020 8 5 9 0 0 Suitable method 11 4 5 6 2 0 1035 8 5 8 8 0 Appropriate law "Please read the precautions on the back before filling this page.) The size of the binding and binding paper is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) -23- Printed at the Consumer Cooperatives of the Central Bureau of Ministry of Economic Affairs, mniB at B7 Description of the invention (21) [Table 3] m Να El (¾) ΔΕΙ (X) r 値 Δ r Eccentric ridge height (^ m) *: (222) / (310) ^ average 値 soil 40% Within the preparation area (%) Hot rolled sheet Cold rolled sheet 1 33.1 1.5 1.58 0.08 11.5 5.8 56 70 85 Suitable example 2 34.2 1.2 1.63 0.05 12.3 4.4 70 91 81 Suitable example 3 J3.3. 2.1 1.43 0.21 9.4 2.1 16 20 58 Comparative example 4 36.1 2.8 1.71 0.38 12.1 2.3 21 27 60 Comparative example 5 33.0 2.2 1.53 0.23 11.2 12.1 j 8 51 Comparative example 6 31'0 3.4 1.51 0.33 10.8 14.3 0.6 0.8 42 Qing j 7 32.1 2.2 1.53 0.28 11.0 9.8 10 13 59 mm1 .8 29.8 1.7 1.33 0.15 9.8 5.1 2.4 3.5 55 Comparative example 9 30.3 2.1 1.41 0.18 10.2 4.7 18 22 63 mm 10 32.5 1.7 1.53 0.13 1U 5.4 30 40 83 Suitable example 11 35.3 0.7 1.68 0.03 12.5 3.4 104 130 85 Suitable example 12 32.1 1.8 1.51 0.15 10.8 5.3 43 55 80 Fit case 13 32.4 1.6 1.55 0.14 11.0 4.7 70 90 83 Fit case 14 31.3 1.3 1.52 0.12 10.8 6.1 54 68 81 Fit case 15 33.8 1.9 1.53 0.08 1Z1 6.0 51 67 82 Fit case 16 27.3 3.2 1.19 0.35 9.1 4.2 9.5 18 38 Thief example 17 27.0 3.0 1.13 0.31 9.2 4.3 9.0] 9 42 Comparative example) 8 33.3 1.4 1.59 0.07 11.3 5.0 70 88 83 Fit case 19 33.4 1.3 1.59 0.09 11.4 5.0 63 80 85 Fit case 20 34.1 U 1.61 0.15 11.8 4.8 62 81 82 General case 21 32.4 1.5 1.59 0.13 11.0 5.3 55 71 85 Suitable example 22 33.3 1.8 1.70 0.16 11.5 5.5 50 71 86 Suitable example 23 33.4 1.7 1.59 0.15 11.5 5.7 55 63 87 Suitable example 24 32.9 1.3 I.6Z 0.09 11.3 5.9 54 79 83 Suitable example 25 34.5 1.2 1.68 0.08 12.1 5.0 60 80 83 fit case 26 33.3 0.9 1.63 0.11 11.0 5.8 57 80 84 fit case 27 32.8 1.3 1.63 0.09 11.5 6.1 48 69 85 fit case 28 33.4 1.1 1.63 0.16 10.9 5.5 51 70 83 fit case 29 33.0 1.5 1.58 0.17 11.3 6.3 43 59 83 Suitable examples-(Please read the precautions on the reverse side before filling out this page) Binding. The size of the paper used for this edition applies to the Chinese National Standard (CNS) A4 (210X297 mm) 24 —

A7 ___B7 V. Description of the invention (22) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs [Table 4] Outline Nα I »ΕΙ (¾) ΔΕΙ (¾) r 値 Δ r Eccentricity wrinkle height«: (222) / (310) π means less than 40% of the average soil to prepare for the test. Field (%) (κ m) surface anti-cold extension plate 1 1 33.1 1.5 1.53 0.08 11.5 5.8 56 70 85 Suitable example 1 2_ 32 * 5 1.3 1.48 0.11 10.3 25.2 18 25 63 Comparative example Γ 3 ^ 32.3 1.3 1.51 0.13 10.3 18.3] 6 η 68 Qing J 1 1 30.3 1.0 1.38 0.29 9.9 12 · 3 JJ 50 Comparative Example 1 5_ 31.3 1.2 1.51 0.09 10.3 17.2 16 21 83 feet 丨 J 1 Γ 33.9 2.9 1.53 0.11 11.5 8.8 J 13 55 Comparative Example 1 7_ 22.5 1.3 1.40 0.33 9.5 8.3 38 48 82 mm 1 8_ 34.1 1.9 1.58 0.13 11.0 28.3 39 52 85 mm 1 9_ 32.5 1.3 1.38 0.11 11.2 7.1 11 18 43 j 1 10 33.3 1.2 1.60 0.08 11.3 5.2 67 83 85, suitable example 1 11 32.9 1.3 1.59 0.05 11.2 5.5 70 88 88 suitable example 2 1 34.3 1.2 1.71 0.05 13.2 7.0 66 83 84 suitable example J 1 32.1 1.5 1.63 0.11 12.1 14.1 40 50 60 Qing 丨】 J 2 30.3 2.1 1.40 0.33 10.3 12.1 40 48 58 Leg cases J 4 32.3 2.3 1.58 0.25 10.2 11.0 48 63 47 Comparative example_3_ 3 30.3 .11 1.51 0.31 11.3 13.4 32 42 65 mm 10 1 32.5 1.7 1.52 0.13 11.1 5.4 30 48 80 Fit case 11 1 35.3 0.7 1.68 0.03 12.5 3.4 104 136 85 Fit case 18 1 32.1 1.8 1.51 0.15 10.8 5.3 43 55 83 Fit case 20 10 34.1 1.7 1.61 0.15 11.8 4.8 62 81 82 Fit case 21 10 32.4 1.5 1.59 0.13 11.0 5.3 55 71 85 Fit case 22 11 33.3 1.8 1.70 0.16 tl.5 5.5 50 71 86 Suitable example 23 11 33.4 1.7 1.59 0.15 11.5 5.7 55 63 87 Suitable example 24 1 32.9 1.3 1.62 0.09 11.3 5.9 54 79 83® Combined example 25 1 34.5 1.3 1.68 0.08 12.1 5.0 60 80 83 Suitable example 26 1 33.3 0,9 1.63 0.11 11.0 5.8 57 80 84 Suitable example 27 1 32.8 1.3 1.63 0.09 11.5 6.1 48 69 85 Suitable example 28 1 33.4 1.1 1.63 0.16 10.9 5.5 51 70 83 ® Combined example 29 1 33.0 1.5 1.58 0.17 Π.3 6.3 43 59 83 (With d &lt; please read the notes on the back before filling out this page)

This paper size applies to China National Standard (CNS) A4 (210X297 mm) 25

Claims (1)

Bulletin -.... Application date September 25, 85 Case No. 85111747 ________ · »&quot; ϊ Category lint / ClS 420719 A4 C4 The invention is a non-embroidered steel sheet with a small amount of anisotropy in the plane and good chick resistance, and a manufacturing method thereof- Surname Hiroko Kosuke Fujiya Yusa (l) i Nationality ⑴ 本 0 Japan (3) Japanese inventor (1) Kawasaki Manufacturing Co., Ltd., Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture, Japan Residence and residence 0 In Kawasaki Manufacturing Co., Ltd., Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture, Japan (3) Kawasaki Manufacturing Co., Ltd. ) Kawasaki Steel Co., Ltd. Kawasaki Steel Co., Ltd. Central Standards Bureau, Ministry of Economic Affairs, Consumer Cooperatives, Printed Line Nationality Residence, Domicile (Office) Name of Representative (1) Japanese Version (1) Chuo-ku, Kobe City, Hyogo Prefecture, Japan Kitamoto-cho Tsuchiichichome No. 28 (I) Eimoto Hiroji private paper size is applicable to Chinese National Standard (CNS) A4 (210X297 mm) Application date: September 25, 85 Case No. 85111747 Category (the above columns are filled out by this Office) The written statement states that the name ψ is issued,% Μ is named-invented Chinese English name nationality Lang Taizhi Shen Zelinjing Xiong Xiao 笠 (4 ) ee Japan (9 Japanese sister, Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba, Japan, residence and residence of the Technical Research Institute of Kawasaki Co., Ltd. (5) Kawasaki-cho, Chiba-shi, Chiba Prefecture, Japan Office B) Japan Institute of Technology, Kawasaki-cho, Chuo-ku, Chiba City, Japan Kawasaki Manufacturing Co., Ltd. Binding Name (Name) Central Bureau of Standards, Ministry of Economic Affairs! Yibaigong Cooperative Co., Ltd. Printed Line Country · Applicant's Residence, Residence (Office) Name of Representative This paper size applies to China National Standard (CNS) A4 Specification (210X297 mm) 420713 (Filled by the Bureau) Major Code I PC classification This case has been filed with: Country (region) for patent application, Date of application: Case No .: □ Is there any claim for priority? B Version 1995 1995 1996 B 6 6 0 2 2 March Month 7- 247770 8- 107289 8-230875 Right Right Right You You Η EE ΗΗ EE 主 EE ττί The owner has no or not 000 The relevant microorganisms have been deposited in: Deposit date: Deposit number (please read the precautions on the back before filling in this (Columns of each page) -n ^ nt n — ^ n In nn m ^ ic Order --- Printed line of the staff consumer cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs-a paper size applicable to the Chinese National Standard (CNS) A4 specification (210X297) %)