JPS59185703A - Production of steel plate - Google Patents

Abstract

PURPOSE:To produce continuously a steel plate having different properties in a transverse direction by a direct rolling method of metallic powders by supplying continuously plural kinds of metallic powders having different properties in the transverse direction to the spacing between forming rolls, and compression-molding the powders then subjecting the molded powder to sintering and hot rolling in succession. CONSTITUTION:Metallic powders 2 are continuously supplied to forming rolls 3, by which the powders are made into a powder-molded plate 4 and are conducted to a sintering furnace 5. The plate is heated and sintered at 1,000-1,300 deg.C in a non-oxidative atmosphere and thereafter the plate is hot-rolled with a hot rolling mill 6 and is coiled with a take-up reel 8. Plural kinds of the metallic powders having different properties are supplied in the transverse direction of the rolls 3 in such direct rolling method of the metallic powders. More specifically, the metallic powder 2b is charged between partition plates 9, 9' provided in the transverse direction of a device 1 for supplying the metallic powders and the metallic powder 2a having the different properties is charged on the outside of the plates 9, 9'. The molded plate formed by compression with the rolls 3 is the powder-molded plate having different properties in both edge parts 4a in the transverse direction and the central part 4b and thereafter the plate is passed through the conventional sintering furnace and hot rolling mill, by which the steel plate having the properties different in the edge parts in the transverse direction and the central part is obtd.

Description

【発明の詳細な説明】 この発明は、金属粉末の直接圧延法番こより巾方向に性
質の異なった鋼板を連続的に製造する方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for continuously manufacturing steel sheets having different properties in the width direction through direct rolling of metal powder.

最近、鋼材の製造に、従来から行われてしまた製銑−製
鋼−圧延法にかわり、直接還元法をこより金属粉末を製
造し、この金属粉末の直接圧延注力５開発され急速に普
及されつつある。この直接圧延法は金属粉末を連続的に
圧縮成形し、高温で焼結し、引続き熱間圧延により製造
されるが、従来の製銑−製鋼−圧延法に比べ省エネルギ
ー、環境問題等すぐれた面が多い。Recently, in the production of steel materials, instead of the traditional pig iron making - steel making - rolling method, metal powder is produced using the direct reduction method, and direct rolling of this metal powder has been developed and is rapidly becoming popular. be. This direct rolling method involves continuous compression molding of metal powder, sintering at high temperature, and subsequent hot rolling, but it has superior aspects such as energy saving and environmental issues compared to the conventional ironmaking-steelmaking-rolling method. There are many.

一方、鋼板には自動運屋根部材等のように、鋼板の巾方
向に異なった機械的性質が要求される場合がある。すな
わち、鋼板の巾方向のエツジ部は加工を行うため加工性
の良好なことが要求され、山中央部は剛性が必要である
。このような巾方向に成分、性質の異なりｔコ鋼板は従
来の製鋼−圧延法による製造は困難である。On the other hand, there are cases where steel plates are required to have different mechanical properties in the width direction, such as in automatic transport roof members. That is, the edges in the width direction of the steel plate are required to have good workability because they are processed, and the central portions of the ridges need to be rigid. It is difficult to manufacture steel sheets with such different compositions and properties in the width direction using conventional steel-making and rolling methods.

この発明は、このような巾方向に異なる成分、性質をも
った鋼板を、金属粉末の直接圧延により連続的に製造す
る方法を提供するもので１．その要旨は、−組の成形ロ
ールに金属粉末を連続的に供給して引続き焼結、圧延す
る金属粉末の直接圧延法において、成形ロール間巾方向
に性質の異なる複数種類の金属粉末を連続的に供給して
圧縮成形し、引続いて焼結、熱間圧延を行うことを特徴
とするものである。The present invention provides a method for continuously manufacturing steel sheets having different compositions and properties in the width direction by direct rolling of metal powder.1. The gist is: - In the direct rolling method of metal powder, in which metal powder is continuously supplied to a set of forming rolls, followed by sintering and rolling, multiple types of metal powders with different properties are continuously applied in the width direction of the forming rolls. It is characterized by supplying it to compression molding, followed by sintering and hot rolling.

以下添付図面にもとづいてこの発明の詳細について説明
する。第１図は金属粉末の直接圧延法を示す略図である
。（１）は金属粉末の供給装置、（２）は金属粉末、（
３）は粉末成形ロール、（４）は金属粉末成形板、（５
）は焼結炉、（６）は熱間圧延機、（７）は非酸化性雰
囲気ガス供給管、（８）は巻取りリールである。The details of this invention will be explained below based on the accompanying drawings. FIG. 1 is a schematic diagram showing a method of direct rolling of metal powder. (1) is a metal powder supply device, (2) is a metal powder, (
3) is a powder molding roll, (4) is a metal powder molding plate, and (5) is a powder molding roll.
) is a sintering furnace, (6) is a hot rolling mill, (7) is a non-oxidizing atmosphere gas supply pipe, and (8) is a take-up reel.

金属粉末（２）は成形ロール（３）に連続的に供給され
圧縮成形されて粉末成形板（４）となり焼結炉（５）に
導かれる。焼結炉（５）では非酸化性雰囲気で１０００
〜１３００°Ｃの温度で加熱焼結されたのち熱間圧延機
（６）により熱間圧延されて巻取リール（８）に巻取ら
れる。The metal powder (2) is continuously supplied to a forming roll (3) and compression-molded to form a powder-formed plate (4), which is led to a sintering furnace (5). 1000 in a non-oxidizing atmosphere in the sintering furnace (5)
After being heated and sintered at a temperature of ~1300°C, it is hot rolled by a hot rolling mill (6) and wound onto a take-up reel (8).

この発明は、このような金属粉末の直接圧延法において
、成形ロール（３）の巾方向に性質の異なった複数種類
の金属粉末を供給する。第２図はこの発明を実施するた
めの装置の一例を示す図である。In the direct rolling method of metal powder, the present invention supplies a plurality of types of metal powder with different properties in the width direction of the forming roll (3). FIG. 2 is a diagram showing an example of an apparatus for carrying out the present invention.

この発明は、金属粉末の供給装置（１）の巾方向に仕切
板＋９＋、＋６＋を設け、仕切り板＋９１．　＋６＋間
に金属粉末（２）ｂを装入し、仕切板＋ｓ）、＋６＋の
外側には性質の異なった金属粉末（２）ａを装入する。This invention provides partition plates +9+, +6+ in the width direction of a metal powder supply device (1), and partition plates +91. A metal powder (2)b is charged between +6+, and a metal powder (2)a having different properties is charged outside of the partition plate +s) and +6+.

成形ロール（３）により圧縮成形された成形板は巾方向
両エツジ部（４）ａと中央部（４）ｂ部とは性質の異な
った粉末成形板が圧縮成形され、以後は従来通りの焼結
炉、熱間圧延機を経て巾方向のエツジ部と中央部の性質
の異なった鋼板が得られるものである。The molded plate compression-molded by the forming roll (3) has powder-formed plates with different properties in both widthwise edge portions (4)a and central portion (4)b, and is then subjected to conventional baking. After going through a furnace and a hot rolling mill, a steel plate with different properties at the edges and in the center in the width direction is obtained.

また、この発明は、金属粉末供給装置を別個に分けて供
給してもよい。第３図はこの発明を実施する装置の他の
例を示す図である。巾方向中央部の金属粉末供給装置（
１）ｂを成形ロール（３）側に設け、巾方向エツジ部の
供給装置＋１）　ａ、（１）五を成形ロール（６）側に
別個に設けて中央部に金属粉末（２）ｂをエツジ部に異
なった金属”粉末＋２＋　ａ　＋’ｚ＋　’ａを連続的
に供給するものである。Further, in the present invention, the metal powder supply device may be separately supplied. FIG. 3 is a diagram showing another example of an apparatus for carrying out the present invention. The metal powder supply device in the center of the width direction (
1) b is provided on the forming roll (3) side, and a feeding device for the width direction edge portion + 1) a, (1) 5 is provided separately on the forming roll (6) side, and metal powder (2) b is provided in the center part. Different metal powders +2+a+'z+'a are continuously supplied to the edge portion.

また、他の適切な供給装置を用いて異なった成分、性質
の金属粉末を３種類以上供給すると鋼板の巾方向に３種
類以上の異なった性質の鋼板が連続的に製造されるもの
である。Furthermore, if three or more types of metal powders with different components and properties are supplied using another suitable supply device, three or more types of steel plates with different properties can be continuously manufactured in the width direction of the steel plate.

実施例について説明する。第２図に例示した装置を用い
て自動車屋根用鋼板を製造した。An example will be explained. A steel plate for automobile roofs was manufactured using the apparatus illustrated in FIG.

エツジ部ａと中央部すに使用した金属粉末の鋼種、粒度
、Ｃ含有量を第１表に示す。Table 1 shows the steel type, grain size, and C content of the metal powder used for the edge portion a and the center portion.

第　　　１　　　表 まｔコ、直接圧延装置の寸法と実施条件を第２表に示す
。Table 1 and Table 2 show the dimensions and operating conditions of the direct rolling equipment.

第　　　２　　　表 得られた鋼板のエツジ部ａと中央部すの機械的性質を第
３表に示す。Table 2 Table 3 shows the mechanical properties of the edge part a and the center part of the obtained steel plate.

第　　　３　　　表 第３表に示すようにエツジ部であるａ部鋼板は加工性が
良好であり、中央部であるｂ部鋼板は剛性にすぐれた鋼
板が得られた。Table 3 As shown in Table 3, the edge part (a) steel plate had good workability, and the center part (b) steel plate had excellent rigidity.

第４図は実施例による鋼板を用いて高形した自動車屋根
部材の断面を示す図である。図でわかるように加工を行
なうエツジａ部は第３表に示すように加工性が良好で、
中央部す部は剛性にすぐれた理想的な鋼板が得られるも
のである。FIG. 4 is a cross-sectional view of an automobile roof member made of steel plate according to an embodiment. As can be seen in the figure, the edge a part to be processed has good workability as shown in Table 3.
In the central part, an ideal steel plate with excellent rigidity can be obtained.

実施例２、第３図に例示する装置を用い溶接管用の鋼板
を製造しγこ。Example 2 A steel plate for a welded pipe was manufactured using the apparatus illustrated in FIG.

供給装置［１）　ｂに装入した金属粉末（２）ｂと供給
装置＋１）　ａ　、＋＋’）　ａに装入した金属粉末（
２）　ａ　Ｏ）　欽ｍ、粒度、Ｃ含有量を第４表に示す
。Supply device [1) Metal powder charged in b (2) b and supply device +1) a, ++') Metal powder charged in a (
2) aO) The molar ratio, particle size, and C content are shown in Table 4.

第　　　４　　　表 また、直接圧延装置の寸法と実施条件を第５表に示す。Table 4 Further, the dimensions and operating conditions of the direct rolling device are shown in Table 5.

第　　　５　　　表 得られた鋼板のエツジ部ａと中央部すの機械的性質を第
６表に示す。Table 5 Table 6 shows the mechanical properties of the edge part a and the center part of the obtained steel plate.

第　　　６　　　表 第６表から明らかのようにエツジ部である８部鋼板は溶
接性良好であり、中央部である５部銅板は溶接性は悪い
が高強度の鋼板が得られた。Table 6 As is clear from Table 6, the 8-section steel plate at the edges had good weldability, and the 5-section copper plate at the center had poor weldability, but a high-strength steel plate was obtained.

第５図は実施例２で得られた銅板により製造した溶接鋼
管の断面を示す図である。図であきらかのようにエツジ
部ａは溶接性が良好であり、溶接欠陥の少なくかつ高強
度の溶接鋼管がイυられるものである。FIG. 5 is a diagram showing a cross section of a welded steel pipe manufactured from the copper plate obtained in Example 2. As is clear from the figure, edge portion a has good weldability, and a welded steel pipe with few weld defects and high strength can be obtained.

以上のように、この発明は従来、製銑−製飾コー圧延法
では製造困難であった巾方向に性質の異なった鋼板を金
属粉末の直接圧延法にまり連続的に製造可能としたもの
で、自動車屋根部材用鋼板あるいは溶接鋼等の品質向上
に寄与する効果は多大なものがある。As described above, the present invention has made it possible to continuously manufacture steel sheets with different properties in the width direction, which was previously difficult to manufacture using the ironmaking-decoration rolling method, by using the direct rolling method of metal powder. It has a great effect on improving the quality of steel plates for automobile roof members, welded steel, etc.

【図面の簡単な説明】[Brief explanation of drawings]

第３図はこの発明を実施する装置の他の例を示す図、第
４図は実施例による鋼板を用いて加工成形した自動車屋
根部材の断面を示す図、第５図は実施例２で得られた鋼
板より製造した溶接鋼管の断面を示す図でふる。 図中　１・・・供給装置、２・・・金属粉末、３・・・
成形ロール、４・・・粉末成形板、５・・・焼結炉、６
・・・熱間圧延機、７・・・非酸化性雰囲気ガス供給管
、８・・・巻取リール、９・・・仕切板。 出願人　　住友金属工業株式会社 第１図 第２図 第３図 ９α 男４図　　　　　　第５図FIG. 3 is a diagram showing another example of an apparatus for carrying out the present invention, FIG. 4 is a diagram showing a cross section of an automobile roof member processed and formed using the steel plate according to the embodiment, and FIG. This is a diagram showing a cross section of a welded steel pipe manufactured from a steel plate. In the figure 1... Supply device, 2... Metal powder, 3...
Forming roll, 4... Powder forming plate, 5... Sintering furnace, 6
...Hot rolling mill, 7.Non-oxidizing atmosphere gas supply pipe, 8.Take-up reel, 9.Partition plate. Applicant: Sumitomo Metal Industries, Ltd. Figure 1 Figure 2 Figure 3 Figure 9α Male Figure 4 Figure 5

Claims (1)

【特許請求の範囲】 一組の成形ロールに金属粉末を連続的に供給して引続き
焼結、圧延する金属粉末の直接圧延【こおムて、成形・
−・し間中方向をこ性質の異なる複数種類の金属粉末を
連続的に供給して圧縮成形し、弓ｌ続いて焼結、熱間圧
延を行うことを特徴とする鋼板の製造方法。[Claims] Direct rolling of metal powder in which metal powder is continuously supplied to a set of forming rolls for subsequent sintering and rolling.
- A method for manufacturing a steel sheet, characterized in that a plurality of types of metal powders having different properties are continuously supplied in the middle direction and compression molded, followed by sintering and hot rolling.