JPS6126757A - Cold rolled steel sheet for deep drawing having sintering hardness - Google Patents
Cold rolled steel sheet for deep drawing having sintering hardnessInfo
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- JPS6126757A JPS6126757A JP14699084A JP14699084A JPS6126757A JP S6126757 A JPS6126757 A JP S6126757A JP 14699084 A JP14699084 A JP 14699084A JP 14699084 A JP14699084 A JP 14699084A JP S6126757 A JPS6126757 A JP S6126757A
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Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
超深絞り性を焼付硬化性にあわせ兼備する冷延鋼板は以
下の諸要請を充足すべき使途に適合する。[Detailed Description of the Invention] (Field of Industrial Application) A cold-rolled steel sheet that has both ultra-deep drawability and bake hardenability is suitable for use that satisfies the following requirements.
近年来自動車の軽量化による燃費向上を目指しして自動
車用鋼板の高強度化の要求が高まった。In recent years, there has been an increasing demand for higher strength steel sheets for automobiles, with the aim of improving fuel efficiency by reducing the weight of automobiles.
一方プレス成形性の面からは、低降伏強度、低引張強度
、高伸び、高r値などの特性が望まれる。On the other hand, from the viewpoint of press formability, properties such as low yield strength, low tensile strength, high elongation, and high r value are desired.
このような二律背反の背景からプレス成形時には軟質で
良好なプレス成形性を示し、その後の塗装焼付時に降伏
強度、引張強度が上昇する特性、すなわち焼付硬化性を
有する鋼板が必要とされる。Against this background, there is a need for a steel sheet that is soft and exhibits good press formability during press forming, and has characteristics that increase yield strength and tensile strength during subsequent coating baking, that is, has bake hardenability.
この発明はプレス成形性のうち超深絞り性を、焼付硬化
性にあわせ兼備する鋼板に関するものである。This invention relates to a steel plate that has ultra-deep drawability among press formability as well as bake hardenability.
(従来の技術)
焼付硬化性を有する冷延鋼板とその製造方法に関して、
特開昭53−114717号公報はT】添加鋼につき、
また特開昭57−70258号公報にはNb添加鋼につ
き、さらに特開昭59−31827号公報では、Nb複
合添加鋼につき、それぞれ開示されている。(Prior art) Regarding a cold rolled steel sheet having bake hardenability and its manufacturing method,
JP-A-53-114717 discloses T] additive steel,
Further, JP-A-57-70258 discloses Nb-added steel, and JP-A-59-31827 discloses Nb composite addition steel.
これらは何れもTi、 Nbの添加量又は焼なまし時の
冷却速度を制御することにより鋼中の固溶C量を適当に
して、材質の劣化を生じさせることなく、焼付硬化能を
付与したものである。In all of these, the amount of solid solute C in the steel is controlled by controlling the amount of Ti and Nb added or the cooling rate during annealing, thereby imparting bake hardenability without causing material deterioration. It is something.
しかし、このようにTi、Nbの添加量を制御して固溶
炭素を残存させようとすると、その添加量の微妙な変化
により鋼板の性質が著しく影響される。すなわち、Ti
、Nbの添加量が不足した場合、伸び、r値など成形性
を左右する材質の劣化につながり、一方、添加量が過剰
となると、焼付硬化性がなくなってしまう。従って、添
加元素量の制御が工程生産上の枢要問題となると考えら
れる。However, if an attempt is made to control the amounts of Ti and Nb added in this way to allow solid solution carbon to remain, the properties of the steel sheet will be significantly affected by subtle changes in the amounts added. That is, Ti
If the amount of Nb added is insufficient, it will lead to deterioration of the material that affects formability such as elongation and r value, while if the amount added is excessive, bake hardenability will be lost. Therefore, controlling the amount of added elements is considered to be a key issue in process production.
(発明が解決しようとする問題点)
このようなTi、 Nbなどの炭窒化物形成元素の添加
量に制限を加える場合における不利を回避すべ(、むし
ろT1と結合すべきS、 Nの含有量を制限す乙ことに
より安定した焼付硬化性を有する深絞り用冷延鋼板を与
えることがこの発明の目的である。(Problems to be Solved by the Invention) It is necessary to avoid such disadvantages when limiting the amount of added carbonitride forming elements such as Ti and Nb (rather, to limit the content of S and N that should be combined with T1). An object of the present invention is to provide a cold-rolled steel sheet for deep drawing that has stable bake hardenability by limiting the following.
ちなみにS、Nの各含有量を制限することに関しては特
開昭58−110659号公報ニSヲ0,001w以下
(以下単に%で示す)〜0.020%、N量0.003
5%、また特開昭58−42752号公報にはNを0.
0025%にそれぞれ制限することに言及されているが
、前者はTi、 B添加量の低減による表面欠陥の防止
、また、後者は二次加工性、およびr値の向上を目的と
しているにすきない。By the way, regarding limiting the respective contents of S and N, Japanese Patent Application Laid-open No. 110659/1983 discloses that S should be 0,001w or less (hereinafter simply expressed in %) to 0.020%, and N content should be 0.003%.
5%, and in Japanese Patent Application Laid-Open No. 58-42752, N is 0.
0.0025%, but the former is intended to prevent surface defects by reducing the amounts of Ti and B added, and the latter is likely to improve secondary processability and r-value. .
(問題点の解決手段)
発明者らは、極低炭素にT1を添加した鋼をベースとし
て、鋼中に含まれるS、 N量と材質の関係を研究して
いた際に、S、 N量の合計量を特定範囲にすることで
高い焼付硬化性かえられることを発見した。(Means for solving the problem) When the inventors were researching the relationship between the amount of S and N contained in the steel and the material quality, using a steel made by adding T1 to ultra-low carbon, they discovered that the amount of S and N contained in the steel We have discovered that high bake hardenability can be achieved by adjusting the total amount of
この発見に基づきこの発明は、上記問題点につき、次の
事項による解決を実現したものである。Based on this discovery, the present invention has achieved the following solutions to the above problems.
1、 C: 0.(1005〜0.0150″L%、
Si: 1.Ow以下以下Mn: 0150″L%
以下、 l: 0.005 〜0.100 wt%P
:0.15wt%以下を含むほか、S :0.003
wL%以下、N:0.0040w以下以下でかつ
(swt%〕+[:Nwt%〕≦0.0050の条件を
満たし、さらに下記式にて与えられる有効T1(Ti”
) を、〔C″1%〕の4〜20倍の範囲で含有し、残
部鉄および不可避的不純物の組成になる、
焼付硬化性(BH:2 kg’ / mm2 以上)
を有する深絞り用冷延鋼板(第1発明))。1, C: 0. (1005~0.0150″L%,
Si: 1. Ow or less Mn: 0150″L%
Hereinafter, l: 0.005 ~ 0.100 wt%P
: Contains 0.15wt% or less, S: 0.003
wL% or less, N: 0.0040w or less, and satisfies the conditions of (swt%] + [:Nwt%]≦0.0050, and the effective T1 (Ti”
) in a range of 4 to 20 times as much as [C″1%], with the balance being iron and unavoidable impurities, with bake hardenability (BH: 2 kg’/mm2 or more)
A cold-rolled steel sheet for deep drawing (first invention)).
2、 C: 0.0005−0.0150wt%、 S
i: 1、Ow%%以下Mn: 0150w以下 以
下、 八jg: 0.005 〜0.100 w以下P
:0.15”1%以下を含む
ほかS :0.003 wt%以下、N : 0.00
40wt%以下でかツ[S w以下]+〔Nwt%〕≦
0.0050の条件を満たし、さらに下記式にて与えら
れる有効Ti (Ti” ) を、[Cwt%〕の4〜
20倍の範囲で含有するとともに
〔C″1%〕の3倍未満のNbと、0.0050wt%
以下のBとのうち、1種又は2種を含有し、残部鉄およ
び不可避的不純物の組成になる、焼付硬化性(B旧2
kg’ 7mm2 以上)を有する深絞り用冷延鋼板。2, C: 0.0005-0.0150wt%, S
i: 1, Ow%% or less Mn: 0150w or less, 8jg: 0.005 to 0.100w or less P
: 0.15" including 1% or less, S: 0.003 wt% or less, N: 0.00
40wt% or less [S w or less] + [Nwt%] ≦
0.0050, and further, the effective Ti (Ti”) given by the following formula is 4 to [Cwt%].
Contains 20 times as much Nb as [C″1%] and less than 3 times as much Nb as 0.0050wt%
Contains one or two of the following B, with the balance being iron and unavoidable impurities.
kg' 7mm2 or more) for deep drawing.
(第2発明)
、3Z
まず上記した各発明に到達した実験の内容について説明
する。coo、 0015%、 Mn:0.1%、 A
β:0.04%。(Second invention), 3Z First, the contents of the experiments that led to the above-mentioned inventions will be explained. coo, 0015%, Mn: 0.1%, A
β: 0.04%.
を含みN、 SおよびTi量を変化させた真空溶解鋼を
、実験室にて溶製し、3.5mm厚さまで熱間圧延後、
さらに0.8+n+nまで冷間圧延した、この冷延板を
800 ℃で40秒均熱する熱サイクルで熱処理し、圧
下率約0.8%の調質圧延を施した後材質を調査した。Vacuum melted steel with varying amounts of N, S and Ti was melted in the laboratory and hot rolled to a thickness of 3.5 mm.
This cold-rolled sheet, which had been cold-rolled to 0.8+n+n, was heat-treated in a thermal cycle of soaking at 800° C. for 40 seconds, followed by temper rolling at a rolling reduction of about 0.8%, and then the material properties were investigated.
なお引張試験にはJIS S号試験片を用いた。Note that a JIS No. S test piece was used for the tensile test.
また焼付硬化性(以下BH性と略す)は第1図に示すよ
うに2%の予歪を与えた後、170 ℃で20分の焼付
相当の時効処理による降伏点の上昇量を測定した。Bake hardenability (hereinafter abbreviated as BH property) was determined by applying 2% prestrain as shown in FIG. 1, and then measuring the increase in yield point by aging treatment at 170° C. for 20 minutes equivalent to baking.
第2図に(S+N) 量とBβ、r値、 elf量の関
係をしめす。ここでBj!、r は圧延方向に対して平
行、45°方向、90°方向に採取した試験片の試験結
果を次式で平均した値である。Figure 2 shows the relationship between the (S+N) quantity, Bβ, r value, and elf quantity. Bj here! , r is a value obtained by averaging the test results of test pieces taken parallel to the rolling direction, in the 45° direction, and in the 90° direction using the following formula.
第2図に、〔S〕+ 〔N量が50ppm以下となると
OHが4kg/mm” 以上になし得ることがわかる。FIG. 2 shows that when the [S] + [N amount is 50 ppm or less, the OH can be increased to 4 kg/mm'' or more.
このときr値、 Eβは劣化せず([S)+ 〔N量)
量が減少するにつれて向上する。At this time, r value and Eβ do not deteriorate ([S) + [N amount]
Improves as quantity decreases.
一方〔S〕が40ppmの鋼(・印)およびNが45p
pm の(ム印)では(〔S〕+ 〔N量)が50pp
mでもBHはせいぜい1.5 lag’ /m12 以
下となった。On the other hand, [S] is 40 ppm steel (・mark) and N is 45 ppm.
In pm (mu mark), ([S] + [N amount)] is 50pp.
Even with m, the BH was at most 1.5 lag'/m12 or less.
以上の結果より[j)量、[N )量、および((3+
(N)) 量を制御することにより有効Ti: Ti
” =((:Ti量 )−−CN%)−5C3%))が
4×〔C%〕以上、すなわちCにたいする有効なT1の
原子比が1以上の場合でも、適切に焼付硬化性が得られ
ることが明らかとなった。From the above results, [j) quantity, [N ) quantity, and ((3+
(N)) Effective Ti by controlling the amount: Ti
” = ((Ti amount) - - CN%) - 5C3%)) is 4 x [C%] or more, that is, even if the effective atomic ratio of T1 to C is 1 or more, appropriate bake hardenability cannot be obtained. It became clear that
(作 用)
このように〔S)、[N)量を制御することにより焼付
硬化性が現れる理由は明らかでないが、TiS、 Ti
N析出物の減少により、TICが不安定になり固溶Cが
残存したものと考えられる。(Function) Although it is not clear why bake hardenability appears by controlling the amounts of [S] and [N] in this way, TiS, Ti
It is thought that due to the decrease in N precipitates, TIC became unstable and solid solution C remained.
さらにS、Nの低減は当然TiS、 TiN等の析出物
の減少につながり、これは、[+1缶のように強加工を
受ける用途にも適合すると考えられる。Furthermore, a reduction in S and N naturally leads to a reduction in precipitates such as TiS and TiN, and this is considered to be suitable for applications that are subject to severe processing, such as [+1 can].
この発明における成分限定の理由について説明する。The reason for limiting the ingredients in this invention will be explained.
CTCは、低いほど材質に有利であり、0.015%を
越えると後述のTiの添加量を増しても、良好な絞り性
が得られなくなる。一方0.OO,05%未満ではこの
発明の目的である焼付硬化性が得られない。したがって
、C量は0.0005%〜0.0150%とする。The lower the CTC, the better the quality of the material, and if it exceeds 0.015%, good drawability cannot be obtained even if the amount of Ti added, which will be described later, is increased. On the other hand, 0. If it is less than 0.05%, the bake hardenability which is the object of this invention cannot be obtained. Therefore, the amount of C is set to 0.0005% to 0.0150%.
Si、 Mn:Si、 Mn は深絞り性を劣化させず
に鋼板の強度を上げるために有効である。ただし、Si
>0150%Mn > 0150%、の添加は鋼板の伸
び、および絞り性を著しく劣化させるので、添加量はS
i 0150%以下Mn’ 1.’0%以下に制限する
。Si, Mn: Si and Mn are effective for increasing the strength of the steel sheet without deteriorating the deep drawability. However, Si
>0150% Mn >0150%, the addition of Mn significantly deteriorates the elongation and drawability of the steel sheet, so the amount added
i 0150% or less Mn' 1. 'Limit to 0% or less.
P:PもSi、 Mnと同様に探しぼり性を劣化させず
に鋼板の強度を上げるが0.15%を越えると鋼板の伸
び、絞り性を著しく劣化させるので0.15%までの添
加にする。P: Like Si and Mn, P also increases the strength of the steel sheet without deteriorating its findability, but if it exceeds 0.15%, it will significantly deteriorate the elongation and drawability of the steel sheet, so it should be added up to 0.15%. do.
へβ:へlは脱酸などのために0.005%以上添加す
るが、0.10%をこえる添加は表面性状に悪影響をお
よぼすので上限を0.10%とする。β: Hel is added in an amount of 0.005% or more for deoxidation and the like, but addition of more than 0.10% has a negative effect on the surface properties, so the upper limit is set at 0.10%.
S、N:鋼中のS、N量はこの発明で最も重要な成分で
あり、先の実験結果から明らかなように、S≦0.00
30%、N量0.0040%でかつ〔S%〕+〔N%〕
≦0.0050 の場合有利に焼付硬化性があられれる
゛ことが限定理由である。S, N: The amounts of S and N in steel are the most important components in this invention, and as is clear from the previous experimental results, S≦0.00
30%, N amount 0.0040% and [S%] + [N%]
The reason for the limitation is that bake hardenability is advantageously improved when ≦0.0050.
Ti:Ti は、S、NそしてCを固定するために添加
するが、従来の焼付硬化性を持つ鋼板のように有効Ti
(Ti” = [Ti量)−7[N%〕−5C8%
〕)をcに対して原子比で1(つまり重量%で0%の4
倍)未満とするのではなく、原子比で1以上、とするこ
とにより、良好な材質と焼付硬化性が得られる。Ti: Ti is added to fix S, N, and C, but unlike conventional bake-hardenable steel plates, effective Ti
(Ti” = [Ti amount)-7[N%]-5C8%
]) to c in an atomic ratio of 1 (that is, 0% by weight)
Good material quality and bake hardenability can be obtained by setting the atomic ratio to 1 or more, rather than less than 2 times).
しかし、過剰なT1の添加は、鋼板の表面性状の劣化に
つながり、コスト的にも不利になるため、その上限を2
0X[:C%〕とする。従ってTi添加量は、4×〔C
%〕≦(〔11%)−−CN%)−−[S%〕)T4
32
≦20X[C%〕とする。However, adding too much T1 leads to deterioration of the surface properties of the steel sheet and is disadvantageous in terms of cost, so the upper limit is set at 2.
0X[:C%]. Therefore, the amount of Ti added is 4×[C
%〕≦([11%)--CN%)--[S%])T4
32 ≦20X [C%].
以上のべたところにおいてNb、 B の1種又は2種
をTiと複合して添加してもこの発明の特徴である焼付
硬化性は失われることなく、r値、Blが向上する。し
かし、Nbについては3×〔C%〕またBは0.005
0%をこえる添加をしてもその硬化は飽和し、コスト的
にも不利になるためNb<3x[C%]B≦0.005
0% とする。As mentioned above, even if one or both of Nb and B are added in combination with Ti, the bake hardenability, which is a feature of the present invention, is not lost, and the r value and Bl are improved. However, for Nb, 3×[C%] and for B, 0.005
Even if more than 0% is added, the curing will be saturated and it will be disadvantageous in terms of cost, so Nb<3x[C%]B≦0.005
0%.
さらに0150%以下のCr、 Cu、 V、 0.0
5%以下のPb。Furthermore, 0.0150% or less Cr, Cu, V, 0.0
5% or less Pb.
Caの添加は、B11性と深絞り性を劣化させないので
これらの添加が可能である。Addition of Ca is possible because it does not deteriorate B11 properties and deep drawability.
以上のような組成を持つ冷延鋼板の製造方法は、特に規
制されない。転炉あるいは電気炉で出鋼した鋼を、造塊
−分塊法あるいは連続鋳造法にてスラブとし、通常の熱
間圧延、冷間圧延により冷延板とする。再結晶焼鈍は、
箱焼鈍法でおこなっても連続焼鈍法でおこなってもよい
。The method for producing cold rolled steel sheets having the above composition is not particularly regulated. Steel tapped in a converter or electric furnace is made into a slab by the ingot-blowing method or continuous casting method, and is made into a cold-rolled plate by normal hot rolling or cold rolling. Recrystallization annealing is
The annealing may be performed by a box annealing method or by a continuous annealing method.
又、次に示す実施例で製造した鋼板は、化成処理性に優
れ、溶融亜鉛めっき性、2次加工性も問題なかった。Further, the steel sheets manufactured in the following examples had excellent chemical conversion treatment properties, and had no problems in hot-dip galvanizing properties and secondary workability.
実施例 1
表1に示す組成の鋼を転炉にて溶製し、真空脱ガス処理
後連続鋳造機にてスラブとした。Example 1 Steel having the composition shown in Table 1 was melted in a converter, and after vacuum degassing treatment, it was made into a slab using a continuous casting machine.
このスラブに通常の熱間圧延、冷間圧延を行って板厚0
.8mmの冷延板とした後、連続焼鈍(均熱条件=80
0℃−305)を施した。表2に製品の機械的性質を示
す。なお機械的性質はすべてJIS 5号試験片を用
いて測定した。This slab is subjected to normal hot rolling and cold rolling to achieve a plate thickness of 0.
.. After forming a cold-rolled sheet of 8 mm, continuous annealing (soaking condition = 80
0°C-305) was applied. Table 2 shows the mechanical properties of the product. All mechanical properties were measured using JIS No. 5 test pieces.
表2に示したYS、 TS、 Bβ、r値は、圧延方
向(X、)、圧延方向から45°(X45) 、圧延方
向から90゜(xso) の方向にとった試験結果の
平均値(X−一虹一眼一一旦 )の値である。またY
BA。The YS, TS, Bβ, and r values shown in Table 2 are the average values of test results taken in the rolling direction (X, ), 45° from the rolling direction (X45), and 90° from the rolling direction (xso). This is the value of Also Y
B.A.
BHそして時効指数Aj(7,5%予歪100 ℃30
分時効後の降伏点上昇分)は圧延方向に平行に採取した
試験片による試験の結果である。BH and aging index Aj (7,5% prestrain 100 ℃ 30
The increase in yield point after aging) is the result of a test using test pieces taken parallel to the rolling direction.
この発明ではすべて50%以上のBA、1.9以上のr
値、および3.2 kg’ 7mm2以上の8H量が得
られた。In this invention, BA of 50% or more, r of 1.9 or more
value, and an 8H amount of more than 3.2 kg' 7 mm2 was obtained.
しかし〔S〕量が範囲外の比較鋼6、(〔S%〕+
[N%〕)が範囲外の比較鋼7ではBH量がそれぞれ1
.2 kg’ 7mm2.0.8kg’ 7mm2
と低かった。又、C量が過剰の比較鋼8、Tl量が不
足した比較鋼9ではBj!、r値の劣化がみられた。However, comparative steel 6 whose [S] amount is outside the range, ([S%] +
[N%]) was outside the range for comparison steel 7, the BH amount was 1, respectively.
.. 2 kg'7mm2.0.8kg' 7mm2
It was low. Moreover, in comparative steel 8 with an excessive amount of C and comparative steel 9 with an insufficient amount of Tl, Bj! , deterioration of r value was observed.
(発明の効果)
上記した[:S:]、(N)および[:S)+[:N)
量の制限によって第1、第2各発明を通じ、Tiを有効
Ti (Ti” )−のCに対する原子比が1以上とな
るように添加した鋼であっても、適切な焼付硬化性が、
深絞り性にあわせて兼備され得る。(Effect of the invention) The above [:S:], (N) and [:S)+[:N)
Due to the limitation of the amount, it is found in the first and second inventions that even in steels in which Ti is added such that the atomic ratio of effective Ti (Ti") to C is 1 or more, appropriate bake hardenability is not achieved.
It can be combined according to deep drawability.
第1図はB)I性の測定要領を示す線図、第2図は鋼中
の(S十N)量と材質の関係を示すグラフである。
第1図
予歪(2,0%) 子
弟2図
(SfNン (PPtn)
手 続 袖 正 書
昭和59年11月8日
特許庁長官 志 賀 学 殿1、事件の
表示
昭和59年特許願第146990号
2、発明の名称
焼付硬化性を有する深絞り用冷延鋼板
3、補正をする者
事件との関係 特許出願人
(125)川崎製鉄株式会社
4、代理人
5、補正の対象 明細書の「発明の名称I及び「焼付
硬化性を有する深絞り用冷延鋼板」と補正する。
−9/1、明細書の特許請求の範囲を以下のとおり
に訂正する。
rl、 C: 0.0005〜0.0150wt%、
Si: 1.Ow’%以下Mn: 1,0″以下 以
下、 Aβ: 0.005 〜0.100 w以下P二
0.15w以下を含むほか、S :0.003 w以下
以下、N : 0.0040w以下以下でかつ[:S
wt%〕→〔Nw以下) ≦0.0050の条件を満た
し、さらに下記式にて与えられる有効T1(Ti” )
を、〔CwL%〕の4〜20倍の範囲で含有し、残部
鉄および不可避的不純物の組成になる、
焼付硬傷露■する深絞り用冷延鋼板。
2、 C: O−,0005〜0.0150wt%、
Si: 1.Ow以下以下Mn: 0150w1% 以
下、 AA’: 0.005 〜0.100 w以下
P:0.15w以下以下を含むほか、S :0.003
w以下以下、 N :0.0040w以下以下でかつ
〔S″%)+(Nw以下〕≦0.0050 ノ条件を満
たし、さらに下記式にて与えられる有効T1(Ti”)
を、〔Cw以下〕の4〜20倍の範囲で含有するととも
に、
〔C°1%〕のゴ倍未満のNbと、0.0050°1%
以下のBとのうち、1種又は2種を含有し、残部鉄およ
び不可避的不純物の組成になる、焼付硬化性を有する深
絞り用冷延鋼板。
(記)
T + * (w 1%)−((Tiwt%:] −−
□ (N wt%〕−−□ 〔S w以下〕)J
2、発明の名称を
「焼付硬化性を有する深絞り用冷延鋼板」に訂正する。
手 続 補 正 書
昭和60年6月5日
特許庁長官 志 賀 学 殿1、事件
の表示
昭和59年特許願第146990号
2、発明の名称
焼付硬化性を有する深絞り用冷延鋼板
3、補正をする者
事件との関係 特許出願人
(125)川崎製鉄株式会社
4、代理人
5、補正の対象 明細書の「発明の詳細な説明」の
欄1、明細書第10頁下から第6〜1行の「Ti :
Tiは一一一が得られる。」を「Ti:TiはS、Nそ
してCを固定するために添加するが有効T1(Ti”
= (Ti量)−−[N%)−−(S%〕)をCに対し
て原子比で1(つまり重量%で0%の4倍)以上とする
ことにより高r値と共に2kyf/−以上の焼付硬化性
が得られる。」に訂正する。
2、同第18頁、第15頁の「表1」、「表2」中の/
169のデータをそれぞれ削除する。
手 続 補 正 書
昭和60年6月29日
特許庁長官 志 賀 学 殿■、事件
の表示
昭和59年特許願第146 ’990号2、発明の名称
焼付硬化性を有する深絞り用冷延鋼板
3、補正をする者
事件との関係 特許出願人
(125) 川崎製鉄株式会社
4、代理人
1、明細書第8頁第20行のr Nb Jをr Ti
、 Wb J+に訂正する。
2、同第6頁第4行のro、oogs%」をjO,00
25%以下」に訂正する。
8、同第16頁第7行の「比較aS、Ti量が不足した
比較鋼9」を「比較鋼8」に訂正する。
4、同第18頁の表1および第15頁の表2をそれぞれ
次のとおりに訂正する。Fig. 1 is a diagram showing the procedure for measuring B) I property, and Fig. 2 is a graph showing the relationship between the amount of (S + N) in steel and the material. Figure 1 Predistortion (2.0%) Child Figure 2 (SfN (PPtn) Procedure Masa Sode Written November 8, 1980 Manabu Shiga, Commissioner of the Patent Office 1, Indication of the case 1988 Patent Application No. 146990 No. 2, Name of the invention Cold-rolled steel sheet for deep drawing with bake hardenability 3, Relationship with the case of the person making the amendment Patent applicant (125) Kawasaki Steel Corporation 4, Attorney 5, Subject of the amendment Description of the specification The title of the invention has been amended to ``I'' and ``cold rolled steel sheet for deep drawing with bake hardenability''.
-9/1, the claims of the specification are amended as follows. rl, C: 0.0005-0.0150wt%,
Si: 1. Ow'% or less Mn: 1,0" or less, Aβ: 0.005 to 0.100 w or less, P2 0.15 w or less, S: 0.003 w or less, N: 0.0040 w or less Dekatsu [:S
wt%] → [Nw or less] ≦0.0050, and the effective T1 (Ti”) given by the following formula
A cold-rolled steel sheet for deep drawing which is resistant to baking hard scratches and has a composition of 4 to 20 times as much as [CwL%], with the balance being iron and unavoidable impurities. 2. C: O-,0005~0.0150wt%,
Si: 1. Ow or less, Mn: 0150w or less, AA': 0.005 to 0.100 w or less, P: 0.15w or less, S: 0.003
w or less, N: 0.0040w or less, and satisfies the following conditions: [S″%) + (Nw or less] ≦0.0050, and furthermore, the effective T1 (Ti”) given by the following formula
Contains Nb in an amount of 4 to 20 times as much as [Cw or less], and Nb that is less than twice as much as [C°1%] and 0.0050°1%.
A cold-rolled steel sheet for deep drawing with bake hardenability, containing one or two of the following B, with the balance being iron and unavoidable impurities. (Note) T + * (w 1%) - ((Tiwt%:] --
□ (N wt%] - - □ [S w or less]) J 2. The title of the invention is corrected to "Cold rolled steel sheet for deep drawing with bake hardenability." Procedural amendment Written on June 5, 1985 Manabu Shiga, Commissioner of the Patent Office1, Indication of the case, Patent Application No. 146990 filed in 19812, Name of the invention Cold rolled steel plate for deep drawing with bake hardenability3, Relationship with the case of the person making the amendment Patent applicant (125) Kawasaki Steel Corporation 4, Agent 5, Subject of amendment Column 1 of “Detailed Description of the Invention” of the specification, page 10 of the specification, 6th from the bottom ~1 line “Ti:
For Ti, 111 can be obtained. "Ti: Ti is added to fix S, N and C, but the effective T1 (Ti"
= (Ti amount) -- [N%) -- (S%]) to C in an atomic ratio of 1 (that is, 4 times as much as 0% by weight) or more, with a high r value and 2kyf/- The above bake hardenability can be obtained. ” is corrected. 2. / in "Table 1" and "Table 2" on pages 18 and 15 of the same
169 data are deleted respectively. Procedural amendments June 29, 1985 Mr. Manabu Shiga, Commissioner of the Patent Office, Indication of the case, Patent Application No. 146 '990 2 of 1982, Name of the invention: Cold-rolled steel sheet for deep drawing with bake hardenability 3. Relationship with the case of the person making the amendment Patent applicant (125) Kawasaki Steel Corporation 4, Agent 1, r Nb J on page 8, line 20 of the specification, r Ti
, Corrected to Wb J+. 2. "ro,oogs%" on page 6, line 4 of the same page, jO,00
Corrected to 25% or less. 8. Correct "Comparative aS, comparative steel 9 with insufficient Ti amount" in line 7 of page 16 to "comparative steel 8". 4. Table 1 on page 18 and Table 2 on page 15 are corrected as follows.
Claims (1)
:1.0^w^t%以下Mn:1.0^w^t%以下、
Al:0.005〜0.100^w^t%P:0.15
^w^t%を含むほか、S:0.003^w^t%以下
、N:0.0040^w^t%以下でかつ〔S^w^t
%〕+〔N^w^t%〕≦0.0050の条件を満たし
、さらに下記式にて与えられる有効Ti(Ti^*)を
、〔C^w^t%〕の4〜20倍の範囲で含有し、残部
鉄および不可避的不純物の組成になる、 焼付硬化性(BH:2kg^f/mm^2以上)を有す
る深絞り用冷延鋼板。 2、C:0.0005〜0.0150^w^t%、Si
:1.0^w^t%以下Mn:1.0^w^t%以下、
Al:0.005〜0.100^w^t%P:0.15
^w^t%以下を含むほか、S:0.003^w^t%
以下、N:0.0040^w^t%以下でかつ〔S^w
^t%〕+〔N^w^t%〕≦0.0050の条件を満
たし、さらに下記式にて与えられる有効Ti(Ti^*
)を、〔C^w^t%〕の4〜20倍の範囲で含有する
とともに、 〔C^w^t%〕の3倍未満のNbと、0.0050^
w^t%以下のBとのうち、1種又は2種を含有し、残
部鉄および不可避的不純物の組成になる、焼付硬化性(
BH:2kg^f/mm^2以上)を有する深絞り用冷
延鋼板。 (記) Ti^*(^w^t%)=(〔Ti^w^t%〕−48
/14〔N^w^t%〕−48/32〔S^w^t%〕
)[Claims] 1. C: 0.0005 to 0.0150^w^t%, Si
: 1.0^w^t% or less Mn: 1.0^w^t% or less,
Al: 0.005-0.100^w^t%P: 0.15
In addition to including ^w^t%, S: 0.003^w^t% or less, N: 0.0040^w^t% or less, and [S^w^t
%]+[N^w^t%]≦0.0050, and furthermore, the effective Ti (Ti^*) given by the following formula is 4 to 20 times the [C^w^t%]. A cold-rolled steel sheet for deep drawing that has bake hardenability (BH: 2 kg^f/mm^2 or more) and has a composition of iron and unavoidable impurities. 2, C: 0.0005-0.0150^w^t%, Si
: 1.0^w^t% or less Mn: 1.0^w^t% or less,
Al: 0.005-0.100^w^t%P: 0.15
Including ^w^t% or less, S: 0.003^w^t%
Below, N: 0.0040^w^t% or less and [S^w
^t%]+[N^w^t%]≦0.0050, and the effective Ti (Ti^*
) in a range of 4 to 20 times as much as [C^w^t%], and less than 3 times as much Nb as [C^w^t%], and 0.0050^
Bake-hardening (
Cold-rolled steel sheet for deep drawing with BH: 2 kg^f/mm^2 or more. (Note) Ti^*(^w^t%) = ([Ti^w^t%]-48
/14 [N^w^t%] -48/32 [S^w^t%]
)
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14699084A JPS6126757A (en) | 1984-07-17 | 1984-07-17 | Cold rolled steel sheet for deep drawing having sintering hardness |
CA000486656A CA1259827A (en) | 1984-07-17 | 1985-07-11 | Cold-rolled steel sheets and a method of manufacturing the same |
AU44885/85A AU560865B2 (en) | 1984-07-17 | 1985-07-12 | Cold rolled steel sheet for vehicle body |
EP85304993A EP0171208B2 (en) | 1984-07-17 | 1985-07-12 | Cold-rolled steel sheets and a method of manufacturing the same |
DE8585304993T DE3568192D1 (en) | 1984-07-17 | 1985-07-12 | Cold-rolled steel sheets and a method of manufacturing the same |
US06/755,500 US4750952A (en) | 1984-07-17 | 1985-07-15 | Cold-rolled steel sheets |
KR1019850005098A KR910002872B1 (en) | 1984-07-17 | 1985-07-16 | Cold-rolled steel sheets and a method of manufacturing the same |
ZA855397A ZA855397B (en) | 1984-07-17 | 1985-07-17 | Cold-rolled steel sheets and a method of manufacturing the same |
BR8503417A BR8503417A (en) | 1984-07-17 | 1985-07-17 | THIN COLD LAMINATED STEEL SHEET AND PROCESS FOR ITS PRODUCTION |
US07/125,921 US4818299A (en) | 1984-07-17 | 1987-11-27 | Method of manufacturing cold-rolled steel sheets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14699084A JPS6126757A (en) | 1984-07-17 | 1984-07-17 | Cold rolled steel sheet for deep drawing having sintering hardness |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6126757A true JPS6126757A (en) | 1986-02-06 |
JPS634899B2 JPS634899B2 (en) | 1988-02-01 |
Family
ID=15420114
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14699084A Granted JPS6126757A (en) | 1984-07-17 | 1984-07-17 | Cold rolled steel sheet for deep drawing having sintering hardness |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS6126757A (en) |
ZA (1) | ZA855397B (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6280251A (en) * | 1985-10-04 | 1987-04-13 | Kawasaki Steel Corp | Low-carbon steel sheet for working excellent in ridging resistance |
JPS6376848A (en) * | 1986-09-19 | 1988-04-07 | Kawasaki Steel Corp | Cold rolled steel sheet for extra deep drawing and its manufacture |
JPS6383230A (en) * | 1986-09-27 | 1988-04-13 | Nkk Corp | Production of high-strength cold rolling steel sheet having excellent quenching hardenability and press formability |
JPS63247338A (en) * | 1987-04-01 | 1988-10-14 | Kawasaki Steel Corp | High tensile strength steel plate for deep drawing having excellent secondary workability and baking hardenability |
WO1990008202A1 (en) * | 1989-01-20 | 1990-07-26 | Sumitomo Metal Industries, Ltd. | Production of seizing-hardenable steel sheet |
JPH02197549A (en) * | 1989-01-27 | 1990-08-06 | Sumitomo Metal Ind Ltd | High strength cold rolled steel sheet for deep drawing having baking hardenability of coating and manufacture thereof |
JPH0331857A (en) * | 1989-06-29 | 1991-02-12 | Mita Ind Co Ltd | Toner for developing electrostatic charge image |
JPH04154937A (en) * | 1990-10-16 | 1992-05-27 | Nippon Steel Corp | High strength galvannealed steel sheet |
JPH05230598A (en) * | 1992-02-19 | 1993-09-07 | Sumitomo Metal Ind Ltd | High strength cold rolled steel sheet for deep drawing having baking hardenability and its production |
JP2011525569A (en) * | 2008-06-23 | 2011-09-22 | ポスコ | Bake hardened steel with excellent surface characteristics and secondary work brittleness resistance and method for producing the same |
US8128763B2 (en) | 2005-09-23 | 2012-03-06 | Posco | Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel sheet and method for manufacturing the cold rolled steel sheet |
KR20220040594A (en) | 2020-09-24 | 2022-03-31 | 주식회사 포스코 | Cold rolled steel sheet and metal plated steel sheet having excellent bake hardenability and anti-aging properties at room temperature and manufacturing method thereof |
KR20220060799A (en) | 2020-11-05 | 2022-05-12 | 주식회사 포스코 | Cold rolled steel sheet and metal plated steel sheet having excellent bake hardenability and anti-aging properties and manufacturing method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53114717A (en) * | 1977-03-18 | 1978-10-06 | Nippon Steel Corp | Cold rolled steel sheet for deep drawing, hardenable after working |
JPS5943824A (en) * | 1982-09-07 | 1984-03-12 | Sumitomo Metal Ind Ltd | Manufacture of cold rolled steel plate for press forming |
-
1984
- 1984-07-17 JP JP14699084A patent/JPS6126757A/en active Granted
-
1985
- 1985-07-17 ZA ZA855397A patent/ZA855397B/en unknown
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53114717A (en) * | 1977-03-18 | 1978-10-06 | Nippon Steel Corp | Cold rolled steel sheet for deep drawing, hardenable after working |
JPS5943824A (en) * | 1982-09-07 | 1984-03-12 | Sumitomo Metal Ind Ltd | Manufacture of cold rolled steel plate for press forming |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6280251A (en) * | 1985-10-04 | 1987-04-13 | Kawasaki Steel Corp | Low-carbon steel sheet for working excellent in ridging resistance |
JPS6376848A (en) * | 1986-09-19 | 1988-04-07 | Kawasaki Steel Corp | Cold rolled steel sheet for extra deep drawing and its manufacture |
JPH0559187B2 (en) * | 1986-09-19 | 1993-08-30 | Kawasaki Steel Co | |
JPH0555586B2 (en) * | 1986-09-27 | 1993-08-17 | Nippon Kokan Kk | |
JPS6383230A (en) * | 1986-09-27 | 1988-04-13 | Nkk Corp | Production of high-strength cold rolling steel sheet having excellent quenching hardenability and press formability |
JPS63247338A (en) * | 1987-04-01 | 1988-10-14 | Kawasaki Steel Corp | High tensile strength steel plate for deep drawing having excellent secondary workability and baking hardenability |
JPH0653913B2 (en) * | 1987-04-01 | 1994-07-20 | 川崎製鉄株式会社 | High tensile steel sheet for deep drawing with excellent secondary workability and bake hardenability |
WO1990008202A1 (en) * | 1989-01-20 | 1990-07-26 | Sumitomo Metal Industries, Ltd. | Production of seizing-hardenable steel sheet |
GB2234985A (en) * | 1989-01-20 | 1991-02-20 | Sumitomo Metal Ind | Production of bake-hardenable steel sheet |
GB2234985B (en) * | 1989-01-20 | 1993-04-07 | Sumitomo Metal Ind | Manufacturing method for bake-hardenable steel sheet |
JPH02197549A (en) * | 1989-01-27 | 1990-08-06 | Sumitomo Metal Ind Ltd | High strength cold rolled steel sheet for deep drawing having baking hardenability of coating and manufacture thereof |
JPH0331857A (en) * | 1989-06-29 | 1991-02-12 | Mita Ind Co Ltd | Toner for developing electrostatic charge image |
JPH04154937A (en) * | 1990-10-16 | 1992-05-27 | Nippon Steel Corp | High strength galvannealed steel sheet |
JPH05230598A (en) * | 1992-02-19 | 1993-09-07 | Sumitomo Metal Ind Ltd | High strength cold rolled steel sheet for deep drawing having baking hardenability and its production |
US8128763B2 (en) | 2005-09-23 | 2012-03-06 | Posco | Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel sheet and method for manufacturing the cold rolled steel sheet |
EP2492363A1 (en) | 2005-09-23 | 2012-08-29 | Posco | Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel sheet and method for manufacturing the cold rolled steel sheet |
US8518191B2 (en) | 2005-09-23 | 2013-08-27 | Posco | Bake-hardenable cold rolled steel sheet with superior strength, galvannealed steel sheet using the cold rolled steel and method for manufacturing the cold rolled steel sheet |
JP2011525569A (en) * | 2008-06-23 | 2011-09-22 | ポスコ | Bake hardened steel with excellent surface characteristics and secondary work brittleness resistance and method for producing the same |
US9011615B2 (en) | 2008-06-23 | 2015-04-21 | Posco | Bake hardening steel with excellent surface properties and resistance to secondary work embrittlement, and preparation method thereof |
KR20220040594A (en) | 2020-09-24 | 2022-03-31 | 주식회사 포스코 | Cold rolled steel sheet and metal plated steel sheet having excellent bake hardenability and anti-aging properties at room temperature and manufacturing method thereof |
KR20220060799A (en) | 2020-11-05 | 2022-05-12 | 주식회사 포스코 | Cold rolled steel sheet and metal plated steel sheet having excellent bake hardenability and anti-aging properties and manufacturing method thereof |
Also Published As
Publication number | Publication date |
---|---|
JPS634899B2 (en) | 1988-02-01 |
ZA855397B (en) | 1986-03-26 |
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