JP5265053B2 - Lightweight cast iron products - Google Patents
Lightweight cast iron products Download PDFInfo
- Publication number
- JP5265053B2 JP5265053B2 JP2012550845A JP2012550845A JP5265053B2 JP 5265053 B2 JP5265053 B2 JP 5265053B2 JP 2012550845 A JP2012550845 A JP 2012550845A JP 2012550845 A JP2012550845 A JP 2012550845A JP 5265053 B2 JP5265053 B2 JP 5265053B2
- Authority
- JP
- Japan
- Prior art keywords
- cast iron
- iron product
- decarburization
- melting point
- hypoeutectic
- 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.)
- Active
Links
- 229910001018 Cast iron Inorganic materials 0.000 title claims description 58
- 238000005261 decarburization Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 239000010410 layer Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000010828 elution Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000002344 surface layer Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000013585 weight reducing agent Substances 0.000 description 6
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000005485 electric heating Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/08—Alloys with open or closed pores
- C22C1/083—Foaming process in molten metal other than by powder metallurgy
- C22C1/087—Foaming process in molten metal other than by powder metallurgy after casting in solidified or solidifying metal to make porous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1089—Alloys containing non-metals by partial reduction or decomposition of a solid metal compound
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
本発明は、軽量化鋳鉄製品及び該製品を製造する方法に関する。 The present invention relates to a light weight cast iron product and a method for producing the product.
自動車を始め、中・大型機械装置の本体や部品には多くの鋳鉄製品が使用されている。これらの鋳鉄製品は、プラスチックとの比較で言えば強度や耐熱性が必要な部分等に用いられ、鋼を含む他の金属との比較で言えば形状が複雑である部分や低コストが要求される部分に用いられ、いずれにせよそれらの性能が求められる多くの分野で使用されている。しかし、プラスチックや他の金属が様々な機能において技術的発展を遂げ、それらに対する優位性が徐々に浸食される中で、鋳鉄製品においても時代に即応した技術的発展が期待されている。 Many cast iron products are used in the body and parts of automobiles and other medium and large machinery. These cast iron products are used for parts that require strength and heat resistance in comparison to plastics, and parts that are complex in shape and low cost are required in comparison with other metals including steel. It is used in many fields where performance is required anyway. However, as plastics and other metals have undergone technical development in various functions and their superiority over these functions has gradually eroded, cast iron products are also expected to develop technically in line with the times.
鋳鉄製品の大きな利用分野の一つに自動車産業があるが、そこでは軽量化が常に大きな課題となっている。もちろん、他の利用分野においても軽量化は永遠の課題である。本件発明者はこれに対し、中空鋳鉄製品という画期的な解答を与えた(特許文献1)。 One of the major applications of cast iron products is the automobile industry, where weight reduction has always been a major challenge. Of course, weight reduction is an eternal issue in other fields of use. In response to this, the present inventor gave a revolutionary answer to hollow cast iron products (Patent Document 1).
特許文献1に記載の鋳鉄製品は、軽量化という点に関して大きな進歩を遂げたものであるが、強度に関しては、プラスチック製品と比較すると十分な強度を持つものの、やはり中空ということもあり、従来鋳鉄を使用していた部品に置き換えるには不十分な場合も多かった。 The cast iron product described in Patent Document 1 has made great progress in terms of weight reduction, but the strength is sufficient compared to plastic products, but it is still hollow, and the conventional cast iron In many cases, it was not enough to replace the parts that had been used.
そこで、本発明が解決しようとする課題は、軽量化と高強度の双方の要求をバランス良く満たした鋳鉄製品を提供することである。 Therefore, the problem to be solved by the present invention is to provide a cast iron product that satisfies both the requirements of light weight and high strength in a well-balanced manner.
上記課題を解決するために成された本発明に係る軽量化鋳鉄製品は、脱炭処理により融点を上昇させた表層部を殻とし、その内側をハニカム状としたものである。 The light weight cast iron product according to the present invention, which has been made to solve the above-mentioned problems, has a surface layer portion whose melting point has been raised by decarburization as a shell and a honeycomb shape inside.
そのような鋳鉄製品の製造方法は、
a) 亜共晶鋳鉄から成る鋳鉄製品を加熱することによりその表面に脱炭層を形成する脱炭工程と、
b) 該脱炭層よりも内部まで貫通する流出孔を形成する流出孔形成工程と、
c) 該流出孔が下部に位置するように前記鋳鉄製品を保持した状態で該鋳鉄製品を、前記脱炭層の融点よりも低く、内部の前記亜共晶鋳鉄の融点よりも高い温度に加熱する溶出工程と
を備えることを特徴とする。The manufacturing method of such cast iron products is:
a) a decarburization step of forming a decarburization layer on the surface of the cast iron product made of hypoeutectic cast iron by heating;
b) an outflow hole forming step for forming an outflow hole penetrating to the inside of the decarburized layer;
c) Heating the cast iron product to a temperature lower than the melting point of the decarburized layer and higher than the melting point of the hypoeutectic cast iron inside while holding the cast iron product so that the outflow hole is located at the bottom. And an elution step.
なお、上記において「亜共晶鋳鉄」とは、その炭素等量CEが次の式(1)を満たす組成を有することを言う(式中の%は重量%)。
2.0 < CE = C% + (Si% + P%)/3 < 4.3 …(1)
CEがこの範囲内の値であれば、その融点は炭素等量に拘わらずほぼ1147℃で一定である。従って、上記c)工程における加熱温度は、概ね、その融点(1147℃)からそれより50℃程度高い温度、すなわち、1147〜1200℃の範囲内とすることが望ましい。なお、脱炭層における炭素濃度を1%以下にしておけば、その部分(脱炭層)の融点は1350℃程度となる。In the above, “hypoeutectic cast iron” means that the carbon equivalent CE has a composition satisfying the following formula (1) (% in the formula is wt%).
2.0 <CE = C% + (Si% + P%) / 3 <4.3… (1)
If CE is within this range, its melting point is constant at approximately 1147 ° C regardless of the carbon equivalent. Therefore, it is desirable that the heating temperature in the above step c) is approximately 50 ° C. higher than the melting point (1147 ° C.), that is, within the range of 1147 to 1200 ° C. If the carbon concentration in the decarburized layer is 1% or less, the melting point of the portion (decarburized layer) is about 1350 ° C.
本願発明に係る上記工程は、基本的には特許文献1に記載の工程と類似しているが、それと大きく異なるのは、特許文献1の請求項1に記載の鋳鉄部品ではその素材を特に限定せず、単に「鋳鉄部品」としているのに対し、本願発明では「亜共晶鋳鉄から成る」ものに限定した点である。なお、特許文献1の請求項3に記載の鋳鉄部品では「共晶炭素濃度を有する」としており、本願発明に係る方法はこの点において特許文献1に記載の発明とは全く異なるものとなっている。 The above-described process according to the present invention is basically similar to the process described in Patent Document 1, but is greatly different from that in the cast iron part described in Claim 1 of Patent Document 1 in particular in its material. However, in the present invention, it is limited to “made of hypoeutectic cast iron”. In addition, in the cast iron part described in claim 3 of Patent Document 1, “having a eutectic carbon concentration”, the method according to the present invention is completely different from the invention described in Patent Document 1 in this respect. Yes.
本願発明では、このように素材として亜共晶鋳鉄を用いるため、図1の状態図から明らかなように、c)の溶出工程において非脱炭部(内部)、すなわち亜共晶鋳鉄、が完全には溶融せず、融点の高いデンドライト状のγ相の一部が格子状に残存する。従って、特許文献1に記載の鋳鉄部品のように内部(非脱炭部)が完全な中空になるのではなく、その部分においてハニカム状となる。もちろん、その分だけ軽量化の効果は多少減殺されているが、強度的には、完全な中空状態よりも十分に強いものとなる。すなわち、本発明に係る方法で製造した鋳鉄製品は、軽量化と高強度の双方の要求をバランス良く満たした鋳鉄製品となっている。 In the present invention, since hypoeutectic cast iron is used as the material in this way, as is apparent from the phase diagram of FIG. 1, the non-decarburized portion (inside), that is, hypoeutectic cast iron, is completely formed in the elution step of c) Does not melt, and part of the dendritic γ phase having a high melting point remains in a lattice shape. Therefore, the interior (non-decarburized portion) is not completely hollow like the cast iron part described in Patent Document 1, but a honeycomb shape is formed in that portion. Of course, the effect of weight reduction is somewhat reduced by that amount, but the strength is sufficiently stronger than the complete hollow state. That is, the cast iron product manufactured by the method according to the present invention is a cast iron product that satisfies both the requirements of light weight and high strength in a balanced manner.
本発明に係る鋳鉄製品の製造例を2種説明する。 Two types of production examples of cast iron products according to the present invention will be described.
第1の例は、図2に示すような軸受のキャップである。その化学成分を図3に示す。図3の最後の欄に示すように、本実施例の鋳鉄製品(以下、鋳鉄製品1と呼ぶ)の素材のCE値は4.03であり、亜共晶である。 The first example is a bearing cap as shown in FIG. The chemical components are shown in FIG. As shown in the last column of FIG. 3, the CE value of the material of the cast iron product (hereinafter referred to as cast iron product 1) of this example is 4.03, which is hypoeutectic.
鋳鉄製品1を電気式加熱炉により、都市ガスを変成してCO/(CO+CO2)*100=75%となるように調整した変成ガス雰囲気中で1060℃まで加熱し、12時間保持するという脱炭処理を行った。脱炭処理後は雰囲気をN2ガスに変え、500℃まで炉冷し、その後大気中で放冷した。
常温にした鋳鉄製品1の一箇所(図2のA部)にφ4.5mmのドリルで深さ3mmの孔(流出孔)を穿孔した。Cast iron product 1 is heated to 1060 ° C in a modified gas atmosphere adjusted to CO / (CO + CO2) * 100 = 75% by transforming city gas with an electric heating furnace and held for 12 hours Decarburization treatment was performed. After decarburization, the atmosphere was changed to N2 gas, furnace-cooled to 500 ° C, and then allowed to cool in the air.
A hole (outflow hole) with a depth of 3 mm was drilled with a φ4.5 mm drill in one place (A part in FIG. 2) of the cast iron product 1 at room temperature.
その後、同じ電気式加熱炉内に、流出孔が下になるように鋳鉄製品1を置き、炉内をN2ガス雰囲気となるようにして、50分かけて1185℃まで加熱し、その温度で8分間保持した。鋳鉄製品1がその温度に達した時点で前記流出孔より溶湯が流出し始めたが、数分の後、溶湯の流出量が減少し、8分の保持時間後には殆ど流出が止んでいた。同じN2雰囲気中で500℃となるまで炉冷し、その後大気中で放冷した。 Then, cast iron product 1 is placed in the same electric heating furnace so that the outflow hole is at the bottom, and the furnace is heated to 1185 ° C. over 50 minutes with N 2 gas atmosphere. Hold for a minute. When the cast iron product 1 reached its temperature, the molten metal began to flow out of the outflow hole, but after a few minutes, the molten metal flowed out and the flow stopped almost after 8 minutes. The furnace was cooled to 500 ° C. in the same N 2 atmosphere, and then allowed to cool in the air.
常温になった鋳鉄部品1の厚み方向中央で切断した断面の状態を図4に示す。周辺の厚さ約3mmの脱炭層よりも内部がハニカム状となっているのが見られる。
上記の処理を行う前の鋳鉄部品1の質量は370gr(グラム)であったが、上記処理後は315grとなっており、軽量化率は15%であった。The state of the cross section cut | disconnected in the thickness direction center of the cast iron component 1 used as normal temperature is shown in FIG. It can be seen that the inside of the decarburized layer with a thickness of about 3 mm has a honeycomb shape inside.
The weight of the cast iron part 1 before the above treatment was 370 gr (grams), but after the treatment, it was 315 gr, and the weight reduction rate was 15%.
第2の例は、オイルポンプカバーである。本実施例の鋳鉄製品(以下、鋳鉄製品2と呼ぶ)は中心に径45mmの穴を有する外径185mmの円盤状の部品であり、中心穴周囲には厚さ28mmのリムが設けられ、外周部における厚さは21mmとなっている。鋳鉄製品2の処理前の質量は3.45kgであり、鋳鉄製品1の約9倍の質量を持つ。その素材の化学組成は図5に示すとおりであり、そのCE値は4.11(亜共晶)である。 The second example is an oil pump cover. The cast iron product of this embodiment (hereinafter referred to as cast iron product 2) is a disk-shaped part with an outer diameter of 185mm having a hole with a diameter of 45mm in the center, and a rim with a thickness of 28mm is provided around the center hole. The thickness at the part is 21 mm. The mass of the cast iron product 2 before processing is 3.45 kg, which is about 9 times the mass of the cast iron product 1. The chemical composition of the material is as shown in FIG. 5, and its CE value is 4.11 (hypereutectic).
鋳鉄製品2の脱炭処理は上記と同じ方法で行った。すなわち、電気式加熱炉で、CO/(CO+CO2)*100=75%とした変成ガス雰囲気中で1060℃まで加熱し、12時間保持した。脱炭処理後は雰囲気をN2ガスに変え、500℃まで炉冷し、その後大気中で放冷した。
鋳鉄製品2については、φ8のドリルで外周部の2箇所に流出孔を穿孔した。The decarburization treatment of the cast iron product 2 was performed by the same method as described above. That is, it was heated to 1060 ° C. in a modified gas atmosphere with CO / (CO + CO 2) * 100 = 75% in an electric heating furnace and held for 12 hours. After decarburization, the atmosphere was changed to N2 gas, furnace-cooled to 500 ° C, and then allowed to cool in the air.
For cast iron product 2, outflow holes were drilled at two locations on the outer periphery with a φ8 drill.
その後、同じ電気式加熱炉内に、両流出孔が下になるように鋳鉄製品2を置き、炉内をN2ガス雰囲気となるようにして、60分かけて1190℃まで加熱し、その温度で12分間保持した。上記同様、鋳鉄製品2がその温度に達した時点で前記流出孔より溶湯が流出し始め、12分の保持時間後には殆ど流出が止んでいた。同じN2雰囲気中で500℃となるまで炉冷し、その後大気中で放冷した。 Then, cast iron product 2 is placed in the same electric heating furnace so that both outflow holes are at the bottom, and the furnace is heated to 1190 ° C over 60 minutes with N2 gas atmosphere. Hold for 12 minutes. As described above, when the cast iron product 2 reached its temperature, the molten metal began to flow out of the outflow hole, and the outflow almost stopped after a holding time of 12 minutes. The furnace was cooled to 500 ° C. in the same N 2 atmosphere, and then allowed to cool in the air.
常温になった鋳鉄部品2をその径方向に切断し、各部の内部の様子を観察したところ、中心穴のリムの内部、及び、外周側の肉厚部の内部においてハニカム状となっているのが確認された。
鋳鉄部品2の中空化処理後の質量は2.31kgとなっており、軽量化率は33%であった。When the cast iron part 2 at room temperature was cut in the radial direction and the inside of each part was observed, it was in a honeycomb shape inside the rim of the center hole and inside the thick part on the outer peripheral side. Was confirmed.
The mass of the cast iron part 2 after being hollowed out was 2.31 kg, and the weight reduction rate was 33%.
Claims (3)
b) 該脱炭層よりも内部まで貫通する流出孔を形成する流出孔形成工程と、
c) 該流出孔が下部に位置するように前記鋳鉄製品を保持した状態で該鋳鉄製品を、前記脱炭層の融点よりも低く、内部の前記亜共晶鋳鉄の融点よりも高い温度に加熱する溶出工程と
を備えることを特徴とする軽量化鋳鉄製品の製造方法。a) a decarburization step of forming a decarburization layer on the surface of the cast iron product made of hypoeutectic cast iron by heating;
b) an outflow hole forming step for forming an outflow hole penetrating to the inside of the decarburized layer;
c) Heating the cast iron product to a temperature lower than the melting point of the decarburized layer and higher than the melting point of the hypoeutectic cast iron inside while holding the cast iron product so that the outflow hole is located at the bottom. A method for producing a lightweight cast iron product, comprising: an elution step.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012550845A JP5265053B2 (en) | 2010-12-27 | 2011-12-19 | Lightweight cast iron products |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010290847 | 2010-12-27 | ||
JP2010290847 | 2010-12-27 | ||
JP2012550845A JP5265053B2 (en) | 2010-12-27 | 2011-12-19 | Lightweight cast iron products |
PCT/JP2011/079367 WO2012090761A1 (en) | 2010-12-27 | 2011-12-19 | Light cast-iron product |
Publications (2)
Publication Number | Publication Date |
---|---|
JP5265053B2 true JP5265053B2 (en) | 2013-08-14 |
JPWO2012090761A1 JPWO2012090761A1 (en) | 2014-06-05 |
Family
ID=46382872
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012550845A Active JP5265053B2 (en) | 2010-12-27 | 2011-12-19 | Lightweight cast iron products |
Country Status (3)
Country | Link |
---|---|
US (1) | US20130284320A1 (en) |
JP (1) | JP5265053B2 (en) |
WO (1) | WO2012090761A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11415173B2 (en) * | 2018-10-17 | 2022-08-16 | Aktiebolaget Skf | Elastomeric bearing having reduced-weight end cap |
US11913496B2 (en) | 2018-10-17 | 2024-02-27 | Aktiebolaget Skf | Elastomeric bearing having carbon-fiber reinforced laminae |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5337958A (en) * | 1976-09-21 | 1978-04-07 | Mazda Motor Corp | Method of manufacturing filter |
JP4099535B2 (en) * | 2004-02-05 | 2008-06-11 | 有限会社アクティ | Processed cast iron part and method of processing cast iron part |
JP2008215331A (en) * | 2007-03-08 | 2008-09-18 | Hino Motors Ltd | Exhaust port of cylinder head and method for forming same |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63190176A (en) * | 1987-01-31 | 1988-08-05 | Toyota Motor Corp | Production of cast iron member having superior corrosion resistance |
JPH1147906A (en) * | 1997-07-29 | 1999-02-23 | Toshiba Mach Co Ltd | Erosion resistant hybrid ladle |
US6709739B1 (en) * | 1999-06-03 | 2004-03-23 | Case Western Reserve University | Closed cell metal composites |
-
2011
- 2011-12-19 WO PCT/JP2011/079367 patent/WO2012090761A1/en active Application Filing
- 2011-12-19 JP JP2012550845A patent/JP5265053B2/en active Active
- 2011-12-19 US US13/976,239 patent/US20130284320A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5337958A (en) * | 1976-09-21 | 1978-04-07 | Mazda Motor Corp | Method of manufacturing filter |
JP4099535B2 (en) * | 2004-02-05 | 2008-06-11 | 有限会社アクティ | Processed cast iron part and method of processing cast iron part |
JP2008215331A (en) * | 2007-03-08 | 2008-09-18 | Hino Motors Ltd | Exhaust port of cylinder head and method for forming same |
Also Published As
Publication number | Publication date |
---|---|
US20130284320A1 (en) | 2013-10-31 |
WO2012090761A1 (en) | 2012-07-05 |
JPWO2012090761A1 (en) | 2014-06-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6261618B2 (en) | Method for producing titanium material and nitrogen solid solution titanium powder material | |
CA2869382C (en) | Method for friction-stir welding of steel sheet | |
JP6211784B2 (en) | Manufacturing method of automotive machine parts having excellent fatigue strength and automotive machine parts by the method | |
CN105339587A (en) | ring tool | |
JP5113104B2 (en) | Spheroidal graphite cast iron pipe and manufacturing method thereof | |
JP5265053B2 (en) | Lightweight cast iron products | |
CN103966478A (en) | Production technology for aluminium alloy casting rod special for automobile Peugeot hubs | |
JP5495648B2 (en) | Machine structural steel with excellent grain coarsening resistance and method for producing the same | |
KR20130031454A (en) | Synchronizer sleeve and manufacturing method thereof | |
JP2013501854A (en) | Method for producing high-strength aluminum-magnesium alloy | |
JPWO2016148206A1 (en) | Age-hardening steel and method for producing parts using age-hardening steel | |
CN109642276A (en) | Ceralumin | |
WO2017100046A1 (en) | Seal rings comprising chromium and boron cast iron | |
JP5856599B2 (en) | Differential equipment parts | |
JP2015117391A (en) | Iron-based sintered alloy, method for producing the same, and high-carbon iron-based powder | |
US10913992B2 (en) | Method of manufacturing a crystalline aluminum-iron-silicon alloy | |
JP6090905B2 (en) | Spheroidal graphite cast iron excellent in high temperature ductility and high temperature creep rupture life and method for producing the same | |
JP2007197747A (en) | Cast iron containing spheroidal graphite | |
US10844450B2 (en) | Black heart malleable cast iron and manufacturing method thereof | |
KR20180063675A (en) | Method for manufacturing Fe-Cu bimetal having good bonding strength | |
JP4099535B2 (en) | Processed cast iron part and method of processing cast iron part | |
KR101683987B1 (en) | Precipitation hardening steels having low density, high strength and elongation and manufacturing method thereof | |
CN107761003A (en) | The powder metallurgy sintered method of bearing cap | |
CN108034861B (en) | Robot cover plate and preparation process thereof | |
KR101518541B1 (en) | Method for manufacturing hot press forming product having different strength and hot press forming product produced by the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20130423 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20130430 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 Ref document number: 5265053 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |