JPS6167775A - Steel bar or wire for cold forging - Google Patents
Steel bar or wire for cold forgingInfo
- Publication number
- JPS6167775A JPS6167775A JP19005784A JP19005784A JPS6167775A JP S6167775 A JPS6167775 A JP S6167775A JP 19005784 A JP19005784 A JP 19005784A JP 19005784 A JP19005784 A JP 19005784A JP S6167775 A JPS6167775 A JP S6167775A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- treatment
- wire
- cold forging
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
- C23C22/22—Orthophosphates containing alkaline earth metal cations
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
Description
【発明の詳細な説明】
発明の技術分野
この発明はねじ類その他各種部品を冷間鍛造にて製造す
る場合に用いられる冷間鍛造用棒鋼線材′に係り、特に
耐ひずみ時効性および冷間鍛造潤滑性(以下「冷鍛性」
と略称する)にすぐれ、冷間鍛造において予成形後の中
間焼鈍の省略を可能ならしめる棒鋼線材に関するもので
ある。[Detailed Description of the Invention] Technical Field of the Invention The present invention relates to a steel bar wire rod for cold forging used when manufacturing screws and other various parts by cold forging, and particularly relates to a steel bar wire rod for cold forging, which is particularly suitable for strain aging resistance and cold forging. Lubricity (hereinafter referred to as "cold forging")
The present invention relates to a steel bar wire rod which has excellent properties (abbreviated as .
従来技術とその問題点
冷間鍛造用の棒鋼線材は、熱間圧延後脱スケール、潤滑
処理を経て冷間で伸線加工が施されたのち、最終成品に
加工される。このよう々加工が施される冷間鍛造用棒鋼
線材としては、従来よりリムド鋼、低中炭素アルミギル
ド鋼棒鋼線材が実用に供されている。Prior Art and Its Problems Steel bar wire rods for cold forging are hot rolled, descaled, and lubricated, then cold wire drawn, and then processed into final products. Rimmed steel and low-medium carbon aluminum guild steel wire bars have been put into practical use as steel wire rods for cold forging that are processed in this manner.
しかるに、一般リムド鋼、一般低中炭素鋼の冷間鍛造に
おいては、加工中に100〜200℃程度まで温度がと
外し、青熱脆性の温度域で冷間鍛造されるため冷間鍛造
中に時効硬化して、工具寿命が著しく低下する。そのた
め従来は予成形後、中間焼鈍を実施し、その後再度脱ス
ケール、2次潤滑処理を施して本成形を行なっている。However, in cold forging of general rimmed steel and general low-medium carbon steel, the temperature drops to about 100 to 200℃ during processing, and cold forging occurs in the blue brittle temperature range. Age hardens, significantly reducing tool life. Therefore, conventionally, after preforming, intermediate annealing is performed, and then descaling and secondary lubrication treatment are performed again to perform main molding.
発 明 の 目 的
この発明は従来の前記実情に鑑みてなされたものであり
、耐ひずみ時効性にすぐれかつD/Do >2.0(D
:製品径、Do:ワイヤー径)の製品の冷間鍛造におい
て予成形後の中間焼鈍および2次潤滑処理が省略可能と
なる冷間鍛造用棒鋼線材を提供するととを目的とするも
のである。Purpose of the Invention This invention was made in view of the above-mentioned conventional circumstances, and has excellent strain aging resistance and D/Do>2.0 (D
An object of the present invention is to provide a steel bar wire rod for cold forging, which makes it possible to omit intermediate annealing and secondary lubrication treatment after preforming in cold forging of a product having a diameter of 1.0: product diameter, Do: wire diameter).
発 明 の 構 成
この発明に係る冷間鍛造用棒鋼線材は、C0,45%以
下、SiO,35%以下、Mn 0.20〜2.00%
、P Q。Structure of the invention The steel bar wire rod for cold forging according to the present invention contains C0, 45% or less, SiO, 35% or less, Mn 0.20 to 2.00%.
,PQ.
040%以下、30.025%以下、sot、N0.o
s o〜0゜090%、N60p¥1m以下を含有し
、かツSol 、kl/N=15以上で残部Feおよび
不可避的不純物からなる素材を用い、熱間圧延後冷却途
中または冷却後200〜500℃の過時効処理を施し、
下記式により算出される時効硬化率が5%以下となるよ
うにした圧延材を脱スケールし、ついでリン酸亜鉛カル
シウム溶液(Ca/Zn = 0.1〜1.0)にて潤
滑下地処理し、続いてステアリン酸ナトリウムを主体と
した潤滑剤(反応型石けん)にて潤滑処理した後伸線し
、伸線材の表面にはリン酸亜鉛カルシウム付着量≧5f
/lrl、反応層(ステアリン酸亜鉛)付着量≧1f/
d、湯溶石けん付着量≧211/rr?の潤滑皮膜を有
し、D/D0> 2.0 (D :製品径、Do:伸線
材径)の製品の冷間鍛造において予成形後の中間焼鈍の
省略を可能ならしめることを特徴とするものであ、る。040% or less, 30.025% or less, sot, N0. o
Using a material containing so~0゜090%, N60p\1m or less, Sol, kl/N = 15 or more and the balance consisting of Fe and inevitable impurities, during cooling after hot rolling or after cooling 200 ~ Overaged at 500℃,
The rolled material was descaled so that the age hardening rate calculated by the following formula was 5% or less, and then the lubricating base was treated with a zinc calcium phosphate solution (Ca/Zn = 0.1 to 1.0). Then, the wire is drawn after being lubricated with a lubricant mainly containing sodium stearate (reactive soap), and the surface of the drawn wire is coated with zinc calcium phosphate ≧5f.
/lrl, reaction layer (zinc stearate) adhesion amount ≧1f/
d. Amount of molten soap adhesion ≧211/rr? It is characterized by having a lubricating film of D/D0 > 2.0 (D: product diameter, Do: wire drawing material diameter), making it possible to omit intermediate annealing after preforming in cold forging of products. It's something.
ただし、T、S :伸線後時効処理材の引張強さくKg
/W )
T、S :伸線のままの引張強さく
即/−)
ここで、この発明の対象鋼を限定した理由について説明
する。However, T, S: Tensile strength of aging treated material after wire drawing (Kg)
/W) T, S: Tensile strength as drawn /-) Here, the reason for limiting the target steel of this invention will be explained.
この発明の対象鋼における成分系としては、圧延のまま
で実用的に冷間鍛造が可能である線材の引張強さが90
K9/Wdであることが要求され、との引張強さに見
合う成分系を前提として、C,St。As for the composition system of the target steel of this invention, the tensile strength of the wire rod, which can be practically cold-forged as rolled, is 90.
K9/Wd is required, and C, St.
■、Sol、fihl 、 Nの組成範囲を前記のごと
く定めた理由は次のとおりである。The reason for determining the composition ranges of (1), Sol, fihl, and N as described above is as follows.
Cはとの発明鋼材では0.45%以上にすると圧縮率7
5%で加工割れを生じるので上限を0.45%とした。C Hato's invented steel has a compressibility of 7 when it is 0.45% or more.
Since processing cracks occur at 5%, the upper limit was set at 0.45%.
まだ下限についてはC量が少々いほど時効性がよくなる
ので、特に限定しない。The lower limit is not particularly limited because the lower the C content, the better the aging properties.
Stは時効性には影響しないが、脱酸あるいは強度調整
用に添加される程度なので上限値を0.35%としだ。Although St does not affect aging properties, it is only added for deoxidation or strength adjustment, so the upper limit is set at 0.35%.
0.35%を超えて含有せしめると冷間鍛造加工性が劣
化するので好ましくなり0
胤はS−iに基づく熱間圧延時の割れ防止および棒鋼線
材の強度調整用に用いられるものが2.0%を超える必
要性はなく、壕だ下限としてはSによる割れ防止のため
最低0.2%が必要である。If the content exceeds 0.35%, the cold forging workability deteriorates, so it is preferable. 2. Seeds are those used for preventing cracking during hot rolling and adjusting the strength of steel wire rods based on S-i. There is no need for it to exceed 0%, and the lower limit of the trench depth should be at least 0.2% to prevent cracking due to S.
SataAJは0.03%以下ではNの固定に不足であ
り、また0、09%を超えると介在物が多くなるので0
.03〜0.09%の範囲に設定した。If SataAJ is less than 0.03%, it is insufficient to fix N, and if it exceeds 0.09%, inclusions will increase.
.. It was set in the range of 0.03% to 0.09%.
Nは806Mの値の上限が0.09%であるのでSat
。Since the upper limit of the value of 806M is 0.09%, N is Sat.
.
Al/N 〉1 ’5でか−)N(1)上限を60pp
mとしだ。Al/N 〉1'5 deka-)N(1) upper limit to 60pp
m and toshida.
なお、時効硬化率(5%以下)は前記成分からなる素材
を熱間圧延後、冷却途中または冷却後別〜500℃の過
時効処理を施すことにより得ることができる。すなわち
、時効処理温度についてはCの拡散が200℃以下では
悪いため析出が十分に行なわれず、また500℃を超え
るとCの固溶度が大きいためやはり析出が不十分となる
。従って時効処理温度は200〜500℃の温度範囲が
好ましい。The age hardening rate (5% or less) can be obtained by hot-rolling a material made of the above-mentioned components and subjecting it to a separate over-aging treatment at ~500° C. during or after cooling. That is, with respect to the aging treatment temperature, if the aging treatment temperature is 200° C. or lower, the diffusion of C is poor, so precipitation is not sufficient, and if it exceeds 500° C., the solid solubility of C is large, so precipitation is also insufficient. Therefore, the aging treatment temperature is preferably in the range of 200 to 500°C.
一方、冷間鍛造中の温度は100〜200℃で、棒鋼線
材の時効処理温度よりも低いので冷間鍛造中に時効処理
の効果が失なわれることはない。On the other hand, the temperature during cold forging is 100 to 200°C, which is lower than the aging treatment temperature of the steel bar wire rod, so the effect of the aging treatment is not lost during cold forging.
すなわち、との発明ではSat 、A/含有量を0.0
3〜0.09%とし、Sat 、N/N上15とするこ
とで、NをAtNとして固定した後Cを冷却途中または
冷却後200〜500℃の時効処理により炭化物として
析出させ固定することによってC,Nによる時効硬化を
抑止1〜たものである。このことは第1図に示すSOム
Aj’ /Nと時効硬化率の関係および第2図に示す線
材の過時効処理温度と時効硬化率の関係より明らかであ
る。That is, in the invention of Sat, A/content is 0.0
3 to 0.09%, and Sat and N/N to 15, and after fixing N as AtN, C is precipitated and fixed as a carbide by aging treatment at 200 to 500 ° C. during or after cooling. Age hardening caused by C and N is suppressed. This is clear from the relationship between the SO ratio Aj' /N and the age hardening rate shown in FIG. 1 and the relationship between the overaging temperature of the wire and the age hardening rate shown in FIG.
なお、第1図における時効条件は80℃X1hrで、A
け過時効処理(300℃X l hr )、Bは・過時
効処理なしの場合の時効硬化率を示したものである。ま
た第2図めイはC0,06%、SiO,05%、Mn0
.30%、Sol、fi−1/N = 12.8、口は
C0,06%、SIo。In addition, the aging conditions in Fig. 1 are 80°C x 1 hr, and A
Overaging treatment (300° C. X l hr); B indicates the age hardening rate without overaging treatment. In addition, the second figure A shows C0.06%, SiO,05%, Mn0
.. 30%, Sol, fi-1/N = 12.8, mouth C0,06%, SIo.
05%、Mn Q、3 Q%、SOl、Al/N =
31.4、ハはC0,23%、SiQ、25%、Mn
1.5%、Sol 、fiJ/N = 20.3の線材
の時効硬化率であり、いずれも時効条件80℃×l h
rの場合の結果である。05%, Mn Q, 3 Q%, SOI, Al/N =
31.4, Ha is C0, 23%, SiQ, 25%, Mn
1.5%, Sol, fiJ/N = 20.3 wire rod age hardening rate, both aging conditions 80 ° C × l h
This is the result for r.
またこの発明では、伸線後の表面にリン酸亜鉛カルシウ
ム付着量≧59/rl、反応層付着量≧1f/m−湯溶
石けん付着量≧2(1/rr?の潤滑皮膜を形成するこ
とを特徴とするが、それは下記の理由による。In addition, in this invention, a lubricating film is formed on the surface after wire drawing with an amount of zinc phosphate adhesion ≧59/rl, a reaction layer adhesion amount ≧1f/m and a molten soap adhesion amount ≧2(1/rr?). It is characterized by the following reasons.
まず、リン酸亜鉛カルシウム皮膜は耐熱性にすぐれ、伸
線により皮膜に亀裂が入ることがないという特徴を有す
る。リン酸亜鉛カルシウム付着量≧517rl、反応層
(ステアリン酸亜鉛)付着量≧1 firl、湯溶石け
ん付着量≧2 firlとしたのは、いずれも冷間鍛造
時の潤滑性能を考慮したものであり、リン酸亜鉛カルシ
ウム付着量≧59/dは従来のリン酸亜鉛付着量≧79
/d(文献等でも7f〃以上と紹介されている)に比べ
るとやや少ないが、これはリン酸亜鉛カルシウム皮膜が
耐熱性にすぐれ皮膜の密着性が良好であることによる。First, the zinc-calcium phosphate coating has excellent heat resistance and is characterized by not cracking during wire drawing. The adhesion amount of zinc calcium phosphate ≥ 517 rl, reaction layer (zinc stearate) adhesion amount ≥ 1 firl, and molten soap adhesion amount ≥ 2 firl are all taken into consideration the lubrication performance during cold forging. , zinc phosphate calcium adhesion amount ≧59/d is the conventional zinc phosphate adhesion amount ≧79
/d (which is introduced as 7f or higher in literature), but this is because the zinc calcium phosphate film has excellent heat resistance and good adhesion.
また、リン酸亜鉛カルシウム付着量≧59/rr?、反
応層付着量≧1f/rrl、湯溶石けん付着量≧2 f
iぜは、潤滑能を考慮した場合の最底の付着量で、これ
以下では冷間鍛造時焼付きを発生する。Also, is the zinc phosphate calcium adhesion amount ≧59/rr? , reaction layer adhesion amount≧1f/rrl, hot water molten soap adhesion amount≧2f
ize is the lowest adhesion amount when lubricating ability is taken into account; below this amount, seizure occurs during cold forging.
上記したこの発明に係る冷間鍛造用棒鋼線材について説
明する。The above-described steel bar wire rod for cold forging according to the present invention will be explained.
まず前記成分からなる鋼を棒鋼線材に熱間圧延した後、
冷却途中まだは冷却後200〜500℃の過時効処理を
施し、時効硬化率が5%以下となるようにした圧延材を
、脱スケール(酸洗)後リン酸亜鉛カルシウム溶液(C
a/Zn = 0.1〜1.0 )にて潤滑下地処理し
、続いて反応型面けん処理を施した後伸線する。First, after hot rolling the steel made of the above ingredients into a steel bar wire rod,
During cooling, the rolled material is subjected to over-aging treatment at 200 to 500°C after cooling so that the age hardening rate is 5% or less, and after descaling (pickling), zinc calcium phosphate solution (C
a/Zn = 0.1 to 1.0), the wire is subjected to a lubricating base treatment, and then subjected to a reactive surface treatment, followed by wire drawing.
ここで、リン酸亜鉛カルシウム溶液のCa/Zn比率を
0.1〜1.0としたのは、第3図に示すCa/Zn比
率とリン酸塩皮膜付着量の関係より、Ca/Znの比が
0.1以下になるとCa比率が少ないためにCa添加の
効果が少なく、耐熱性が十分でなく、またCa/Znの
比が1.0以上の場合は化成処理性、反応型面けんとの
反応性が悪く、第4図に示すCa/Zn比率と反応層付
着量の関係より、所定のリン酸亜鉛カルシウム付着量(
≧597rl)、反応層付着量(≧1f/y/)が得ら
れにくいからである。Here, the reason why the Ca/Zn ratio of the zinc calcium phosphate solution was set to 0.1 to 1.0 was based on the relationship between the Ca/Zn ratio and the amount of phosphate film deposited as shown in Figure 3. When the ratio is less than 0.1, the Ca ratio is small, so the effect of Ca addition is small and the heat resistance is insufficient, and when the Ca/Zn ratio is more than 1.0, chemical conversion treatment properties and reactive surface oxidation are poor. According to the relationship between the Ca/Zn ratio and the amount of reaction layer adhesion shown in Figure 4, the predetermined amount of adhesion of calcium zinc phosphate (
This is because it is difficult to obtain a reaction layer adhesion amount (≧1f/y/).
々お、全酸度(処理濃度)、温度、時間については、対
象加工品の難易度によって従来のリン酸亜鉛処理と同様
に適当に変更すればよい(通常は全酸度30〜40ポイ
ント、温度70〜80℃、時間5〜20分)。As for the total acidity (processing concentration), temperature, and time, you can change it appropriately as in the conventional zinc phosphate treatment depending on the difficulty of the target product (usually, the total acidity is 30 to 40 points and the temperature is 70 points). ~80°C, time 5-20 minutes).
また、リン酸亜鉛カルシウム処理後の反応型面けん処理
は、従来のリン酸亜鉛処理と同様でよい。Further, the reactive surface cleaning treatment after the zinc calcium phosphate treatment may be the same as the conventional zinc phosphate treatment.
いずれの場合も、リン酸亜鉛カルシウム処理、反応型面
けん処理、伸線の潤滑付着量、すなわち、リン酸亜鉛l
カルシウム付着量、反応層付着量、実 施 例
第1表に示す成分を有する供試材を用い、かつ潤滑処理
として、リン酸亜鉛カルシウム処理(Ca/Zn =
0.3 )−反応型面けん処理を実施し、伸線して得ら
れたワイヤーを用い、全圧縮率約80%の製品を冷間鍛
造した。In either case, the amount of lubrication deposited during zinc calcium phosphate treatment, reactive surface cleaning treatment, and wire drawing, i.e., zinc phosphate l
A sample material having the amount of calcium deposited, the amount of reaction layer deposited, and the components shown in Example Table 1 was used, and as a lubrication treatment, zinc phosphate calcium treatment (Ca/Zn =
0.3) - Using the wire obtained by carrying out the reaction type surface treatment and drawing, a product with a total compression rate of about 80% was cold forged.
なお比較のため、従来鋼(リムド鋼−リン酸亜鉛処理−
反応型面けん処理)について同様に実施した。For comparison, conventional steel (rimmed steel - zinc phosphate treatment)
The same procedure was carried out for (reactive surface treatment).
本実施例の結果を第2表に示す。なお、試験販4.5に
おける伸線材の潤滑剤付着量を第3表に示した。The results of this example are shown in Table 2. Table 3 shows the amount of lubricant applied to the wire drawn material in test sales 4.5.
第2表の結果より、この発明の非時硬線材にリン酸亜鉛
カルシウム処理(+反応型面けん処理)を施し伸線して
得られたワイヤーは、中間焼鈍の省略が可能であり、従
来の中間焼鈍品に比べ冷鍛荷重の上でもほとんど差はな
いことがわかる。From the results in Table 2, the wire obtained by subjecting the non-time-hardened wire rod of the present invention to zinc calcium phosphate treatment (+reactive surface treatment) and drawing it can omit intermediate annealing, and It can be seen that there is almost no difference in cold forging load compared to the intermediate annealed product.
なお、この発明の非時効線材でも、リン酸亜鉛処理の場
合は潤滑皮膜の耐熱性に乏しく冷間鍛造は不可能であっ
た。Even with the non-aging wire rod of the present invention, cold forging was impossible due to poor heat resistance of the lubricating film when treated with zinc phosphate.
また、第3表に示す伸線材の潤滑剤付着量より明らかな
ごとく、伸線材の潤滑剤付着量によって冷鍛性は大きく
異なり、冷間潤滑能の点から湯溶石けん付着量≧2.0
9/rt?、反応層付着量≧If/rr?。In addition, as is clear from the amount of lubricant applied to the drawn wire material shown in Table 3, cold forging properties vary greatly depending on the amount of lubricant applied to the drawn wire material.
9/rt? , reaction layer adhesion amount≧If/rr? .
リン酸亜鉛カルシウム付着量≧591r&を必要とする
。なお、それぞれの付N:敗は、リン酸亜鉛カルンウム
処理において、同一処理条件の場合でもカルシウムと亜
鉛の比によって異なってくる。従って、Ca/Zn比に
よって処理条件(濃度、時間、温度)を検討する必要が
ある。Requires zinc phosphate calcium adhesion amount ≧591r&. It should be noted that each N:N value differs depending on the ratio of calcium and zinc in the zinc phosphate treatment even under the same treatment conditions. Therefore, it is necessary to consider the processing conditions (concentration, time, temperature) depending on the Ca/Zn ratio.
第1表 供試材成分(96)
第2表 冷間鍛造試験結果
ただし、1次潤滑:伸線前のリン酸塩処理の種類
予成形:かさ形状
2次潤滑:本成形前(予成形後)のリ
ン酸塩処理の種類
第3表 伸線材の潤滑剤付着量Cf1rl)発明の□作
用効果
この発明は上記のごとく、So/ 、Al O,03〜
0.09%、500℃の過時効処理を施している)から
なり、伸線後の表面に耐熱性にすぐれたリン酸亜鉛カル
シウム皮嘆と、反応層および湯溶石けん皮膜を有し、か
つ時効硬化率5%以下の非時効性を有するので、冷間鍛
造中に時効硬化することがなく、予成形前の中間焼鈍お
よび2次潤滑処理を省略することができ、工程の省略お
よび製品製油コストの大巾低減をはかることができる。Table 1 Sample material composition (96) Table 2 Cold forging test results However, primary lubrication: Type of phosphate treatment before wire drawing Preforming: Umbrella shape Secondary lubrication: Before main forming (after preforming) ) types of phosphate treatment Table 3 Amount of lubricant deposited on wire drawing material Cf1rl) □ Effects of the invention As described above, this invention
0.09%, over-aged at 500°C), and has a highly heat-resistant zinc calcium phosphate coating on the surface after wire drawing, a reaction layer and a molten soap coating, and It has non-aging properties with an age hardening rate of 5% or less, so it does not age harden during cold forging, and intermediate annealing and secondary lubrication treatment before preforming can be omitted, resulting in the elimination of processes and product oil refinement. It is possible to significantly reduce costs.
第1図はこの発明におけるsot、At/Nと時効硬化
率の関係を示す図表、第2図は同じく過時効処理温度と
時効硬化率の関係を示す図表、第3図は同じ(Ca/Z
n比率とリン酸塩皮膜付着量の関係を示す図表、第4図
は同じくCa/Znと反応層付着量の関係を示す図表で
ある。
(r/i ) )η峡I南重駅10
(−4)引目嫂凹η
(%)*羽1e佼到
(%)*羽塗佼 灯Figure 1 is a chart showing the relationship between sot, At/N and age hardening rate in this invention, Figure 2 is a chart showing the relationship between overaging treatment temperature and age hardening rate, and Figure 3 is the same (Ca/Z
FIG. 4 is a chart showing the relationship between the n ratio and the amount of phosphate film deposited, and FIG. 4 is a chart showing the relationship between Ca/Zn and the amount of reaction layer deposited. (r/i) ) η Gorge I Nanjyu Station 10 (-4) Hikime 嫂 dent η (%) *Ha1e佼到(%) *Hayurikyou Light
Claims (1)
〜2.00%、P0.040%以下、S0.025%以
下、Sol.Al0.030〜0.090%、N60p
pm以下を含有し、かつSol.Al/N=15以上で
残部Feおよび不可避的不純物からなる鋼を熱間圧延後
過時効処理を施し、該圧延材を脱スケール後リン酸亜鉛
カルシウム溶液にて潤滑下地処理し、続いてステアリン
酸ナトリウムを主体とした潤滑剤にて潤滑処理した後伸
線し、伸線後の表面にリン酸亜鉛カルシウム付着量≧5
g/m^2、反応層付着量≧1g/m^2、湯溶石けん
付着量≧2g/m^2の潤滑皮膜と耐ひずみ時効性を有
することを特徴とする冷間鍛造用棒鋼線材。C0.45% or less, Si0.35% or less, Mn0.20
~2.00%, P0.040% or less, S0.025% or less, Sol. Al0.030-0.090%, N60p
pm or less, and Sol. A steel with Al/N = 15 or more and the balance consisting of Fe and unavoidable impurities is hot-rolled and then over-aged, and after descaling, the rolled material is lubricated with a zinc calcium phosphate solution, and then treated with stearic acid. The wire is drawn after being lubricated with a sodium-based lubricant, and the amount of zinc calcium phosphate deposited on the surface after drawing is ≧5.
A steel bar wire rod for cold forging, characterized by having a lubricating film with a reaction layer coating amount of 1 g/m^2, a molten soap coating amount of 2 g/m^2, and strain aging resistance.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19005784A JPS6167775A (en) | 1984-09-10 | 1984-09-10 | Steel bar or wire for cold forging |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19005784A JPS6167775A (en) | 1984-09-10 | 1984-09-10 | Steel bar or wire for cold forging |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6167775A true JPS6167775A (en) | 1986-04-07 |
JPH0469227B2 JPH0469227B2 (en) | 1992-11-05 |
Family
ID=16251623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19005784A Granted JPS6167775A (en) | 1984-09-10 | 1984-09-10 | Steel bar or wire for cold forging |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6167775A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2423344A2 (en) * | 2009-04-23 | 2012-02-29 | Posco | High strength, high toughness steel wire rod, and method for manufacturing same |
-
1984
- 1984-09-10 JP JP19005784A patent/JPS6167775A/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2423344A2 (en) * | 2009-04-23 | 2012-02-29 | Posco | High strength, high toughness steel wire rod, and method for manufacturing same |
EP2423344A4 (en) * | 2009-04-23 | 2014-10-29 | Posco | High strength, high toughness steel wire rod, and method for manufacturing same |
Also Published As
Publication number | Publication date |
---|---|
JPH0469227B2 (en) | 1992-11-05 |
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