US20150246391A1 - Method for Manufacturing Steel Casts - Google Patents

Method for Manufacturing Steel Casts Download PDF

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Publication number
US20150246391A1
US20150246391A1 US14/428,336 US201314428336A US2015246391A1 US 20150246391 A1 US20150246391 A1 US 20150246391A1 US 201314428336 A US201314428336 A US 201314428336A US 2015246391 A1 US2015246391 A1 US 2015246391A1
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US
United States
Prior art keywords
reinforcement insert
micro
steel
mold
melting
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.)
Abandoned
Application number
US14/428,336
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English (en)
Inventor
Alberto Andreussi
Primo Andreussi
Eddy Pontelli
Enrico Veneroso
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
F A R - FONDERIE ACCIAIERIE ROIALE - SpA
Far - Fonderie Acciaierie Roiale - SpA
Original Assignee
Far - Fonderie Acciaierie Roiale - SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Far - Fonderie Acciaierie Roiale - SpA filed Critical Far - Fonderie Acciaierie Roiale - SpA
Assigned to F. A. R. - FONDERIE ACCIAIERIE ROIALE - S.P.A. reassignment F. A. R. - FONDERIE ACCIAIERIE ROIALE - S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANDREUSSI, ALBERTO, ANDREUSSI, PRIMO, PONTELLI, EDDY, VENEROSO, ENRICO
Publication of US20150246391A1 publication Critical patent/US20150246391A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/02—Casting in, on, or around objects which form part of the product for making reinforced articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/38—Process control to achieve specific product aspects, e.g. surface smoothness, density, porosity or hollow structures
    • B22F3/1055—
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
    • B22F7/08—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools with one or more parts not made from powder
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C33/00—Making ferrous alloys
    • C22C33/003—Making ferrous alloys making amorphous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/36—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.7% by weight of carbon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C45/00—Amorphous alloys
    • C22C45/02—Amorphous alloys with iron as the major constituent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • chromium carbides have the tendency to precipitate to the grain edge, making the structure fragile and reducing the toughness of the steel.
  • a heat treatment is therefore necessary, typically a solubilization annealing followed by water quenching, which is carried out after the cooling of the steel has been completed. The annealing and subsequent rapid cooling allow to make the carbides migrate from the grain edge to the austenitic matrix.
  • annealing does not allow to obtain a complete solubilization of the carbides, and therefore it is intended to modify the form of the latter, so as to make them globular and therefore less inclined to form cracks. Furthermore, another function of annealing and quenching is to distribute the carbides present at the grain edge uniformly around the austenitic grain.
  • Methods are known, from GB-A-2098112 and GB-A-2003932, for manufacturing wear elements reinforced by high-resistance inserts having a heterogeneous structure defined by sintered particles in a metal matrix.
  • the above methods provide to make the inserts by uniting carbides, for example tungsten or titanium carbides, in the form of powders or granules, to metal matrixes containing alloys of iron or cobalt using sintering techniques carried out at temperatures above the melting temperature of the alloys.
  • the melting of the alloys causes the carbides to be incorporated into the metal matrixes and possibly the sizes of the carbides to be reduced. Afterward, the inserts thus made are introduced into a mold and incorporated into the metal alloy that is cast onto them.
  • EP-B1-0554682 describes a method for manufacturing an element subject to wear in which one or more planar inserts, conformed as plates, sheets or discs, are obtained by incorporating powders of materials with high resistance to wear, in particular carbides, for example tungsten carbides, in a metal matrix.
  • the reinforcement inserts described in EP-B 1-0554682 can also include organic binders, plasticizers and hardening agents.
  • the planar insert is subjected to high-temperature vacuum sintering and is then attached to a sand mold by means of pins or other anchoring elements made of the same material.
  • sintering is carried out essentially at temperatures that come within the range of the melting temperature of the metal matrix, and lower than the melting temperatures of the carbides.
  • the purpose of sintering is essentially to determine an interface contact, or uniformly distributed, between the carbides and the matrix, in order to obtain reinforcement inserts consisting of a conglomerate of carbides immersed in the metal matrix.
  • the original carbides remain substantially unchanged, except for possible variations in size.
  • DE-A1-4214524 describes a method for manufacturing a wear-resistant cast that provides to insert into the mold, before casting, a reinforcement insert made with balls of hard material, in particular carbides, housed in seatings made in holed sheets of steel and held in position by the same holed sheets of steel.
  • Purpose of the present invention is to perfect a method that allows to obtain, by casting, casts of steel alloys, advantageously but not exclusively manganese steel, having throughout the toughness of manganese steel and, in localized zones, the hardness needed to resist stresses of wear and abrasion.
  • the invention obtains steel casts that, throughout the localized zones, have a homogeneous micro-structure and a uniform distribution of the mechanical characteristics.
  • the Applicant has devised, tested and embodied the present invention to overcome the shortcomings of the state of the art and to obtain these and other purposes and advantages.
  • a method according to the present invention is used for manufacturing steel casts, in particular but not exclusively for manufacturing manganese steel casts intended to obtain wear elements.
  • the method comprises at least a step of making at least a reinforcement insert, a step of preparing a mold for the cast to be manufactured, and a subsequent step of casting the steel inside the mold.
  • the reinforcement insert is made by compacting an amorphous mass of hardening powder in a desired geometric shape.
  • the compacting is obtained by means of sintering techniques with a selective and localized melting comprising one or another of the techniques identified as EBM (Electron Beam Melting), SLM (Selective Laser Melting), or other similar or comparable techniques.
  • the amorphous mass of hardening powder is obtained by mixing powders of pure elements, or of compounds that form carbides and/or micro-structures of great hardness, which due to the effect of the melting generate carbides and/or micro-structures of great hardness.
  • Making reinforcement inserts with EBM or SLM techniques or similar also has the other advantage of obtaining a rapid and accurate process, and also allows to obtain reinforcement inserts starting from powders of high-melting materials, for example tungsten, titanium, molybdenum, advantageously usable pure or alloyed in iron alloys, which, after the chemical reactions that are triggered due to the effect of the type of melting, give rise to carbides or other hard micro-structures.
  • high-melting materials for example tungsten, titanium, molybdenum, advantageously usable pure or alloyed in iron alloys, which, after the chemical reactions that are triggered due to the effect of the type of melting, give rise to carbides or other hard micro-structures.
  • the mold preparation step comprises a sub-step of positioning at least one reinforcement insert inside the mold.
  • at least one appendix is also made in a piece therewith, with the function of anchoring the reinforcement insert to the mold.
  • the sintering techniques melt the powders of pure elements, or compounds that form carbides and/or micro-structures of great hardness, triggering chemical reactions to generate carbides and/or micro-structures of great hardness, uniformly and homogeneously distributed inside the reinforcement insert and defining a homogeneous micro-structure of the latter.
  • the carbides make the reinforcement insert uniformly hard and resistant to wear, and suitable to confer these properties throughout the volume of the zones of the cast into which it is inserted.
  • the reinforcement insert is partly melted, which advantageously allows an intimate welding with the cast steel, to confer on the cast obtained a homogeneous macro-structure.
  • the method 10 provides that in a preparation step 11 a mold 11 is made for every cast 110 , that in a subsequent casting step 12 molten manganese steel is cast inside the mold 111 and that in a standby step the cast 110 solidifies.
  • the preparation step 11 comprises a sub-step 14 of positioning at least one reinforcement insert 115 inside the internal cavity 113 of the mold 111 .
  • Sintering provides an initial compacting of the hardening powder 118 , which is then at least partly melted using high density energy, and subsequently re-solidified.
  • a second formulation of the present invention provides that, as well as iron-based powder, the hardening powder 118 comprises the following components:
  • molybdenum in a percentage comprised between 0.5% and 1.5%.
  • the primary function of sintering by means of EBM or SLM is therefore to determine the micro-structure of the reinforcement insert 115 , triggering chemical reactions starting from the base components.
  • an anchoring operation is also carried out, during which it is anchored at least to one of the perimeter walls 112 of the mold 111 .
  • the reinforcement insert 115 comprises, at its ends, one or more appendixes 120 , which function as anchoring means and which are inserted inside the corresponding perimeter walls 112 .
  • FIG. 3 shows an example of a cast 110 showing the incorporated position of the reinforcement insert 115 .
  • the use of EBM or SLM techniques allows to obtain reinforcement inserts 115 which are not only micro-structurally homogeneous but also substantially without residual porosity and tensions, and therefore advantageously compact and resistant.
  • the reinforcement inserts 115 thus obtained do not need heat treatments after they have been made, and therefore can be put into the mold 111 immediately after sintering.
  • each reinforcement insert 115 can be subjected to partial melting which, during the subsequent solidification, allows to obtain a cast 110 that is macro-structurally homogeneous, due to the welding of the cast steel and the melted part of the reinforcement insert 115 .
  • the cast 110 obtained maintains a generally heterogeneous micro-structure, which has a greater hardness in correspondence with the zones concerned with the reinforcement insert 115 , which is uniformly distributed in them and constant, that is, without point-by-point variations.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Automation & Control Theory (AREA)
  • Powder Metallurgy (AREA)
  • Coating By Spraying Or Casting (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
  • Heat Treatment Of Steel (AREA)
US14/428,336 2012-09-14 2013-09-04 Method for Manufacturing Steel Casts Abandoned US20150246391A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITUD2012A000159 2012-09-14
IT000159A ITUD20120159A1 (it) 2012-09-14 2012-09-14 Procedimento per la fabbricazione di getti in acciaio
PCT/IB2013/001904 WO2014041409A2 (en) 2012-09-14 2013-09-04 Method for manufacturing steel casts

Publications (1)

Publication Number Publication Date
US20150246391A1 true US20150246391A1 (en) 2015-09-03

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ID=47138118

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Application Number Title Priority Date Filing Date
US14/428,336 Abandoned US20150246391A1 (en) 2012-09-14 2013-09-04 Method for Manufacturing Steel Casts

Country Status (9)

Country Link
US (1) US20150246391A1 (pt)
EP (1) EP2916978B1 (pt)
BR (1) BR112015005687A2 (pt)
CA (1) CA2884928C (pt)
ES (1) ES2710100T3 (pt)
IT (1) ITUD20120159A1 (pt)
PT (1) PT2916978T (pt)
TR (1) TR201901636T4 (pt)
WO (1) WO2014041409A2 (pt)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105618751A (zh) * 2015-12-16 2016-06-01 伊特克斯惰性气体系统（北京）有限公司 一种超高纯气氛保护的选择性激光熔化系统
CN106041031A (zh) * 2016-07-29 2016-10-26 河海大学常州校区 一种铸件表面高熵合金涂层的制备方法
DE102016211358A1 (de) * 2016-06-24 2017-12-28 Bayerische Motoren Werke Aktiengesellschaft Gussbauteil sowie Verfahren zur Herstellung eines Gussbauteils
US10173258B2 (en) 2014-04-30 2019-01-08 Daido Steel Co., Ltd. Steel for mold, and mold
WO2019094210A1 (en) 2017-11-10 2019-05-16 Divergent Technologies, Inc. Structures and methods for high volume production of complex structures using interface nodes
CN110090940A (zh) * 2018-01-31 2019-08-06 戴弗根特技术有限公司 用于共同铸造增材制造的接口节点的系统和方法
CN113000822A (zh) * 2021-02-03 2021-06-22 邯郸慧桥复合材料科技有限公司 一种陶瓷强化Fe-B合金及其制备方法
CN113290230A (zh) * 2020-02-24 2021-08-24 北京兆牌科技发展有限公司 铸造产品预布置硬面、硬点设计方法及相应铸件

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US20170233986A1 (en) * 2016-02-15 2017-08-17 Caterpillar Inc. Ground engaging component and method for manufacturing the same
DE102016117071A1 (de) 2016-07-15 2018-01-18 Craco Gmbh Verbundpanzerung und Verfahren zur Herstellung
EP3270093B1 (de) 2016-07-15 2020-03-04 Craco GmbH Panzerplatte und verfahren zur herstellung
DE102017119257A1 (de) * 2017-08-23 2019-02-28 Man Truck & Bus Ag Tragbock für ein lenkergeführtes Doppelachsaggregat
DE102017129818A1 (de) * 2017-12-13 2019-06-13 Craco Gmbh Panzerplatte und Verfahren zur Herstellung
EP3752699B1 (en) 2018-02-14 2022-04-27 VKR Holding A/S Compressible pillar for a vacuum insulated glazing unit
CN110523986A (zh) * 2019-09-25 2019-12-03 华南理工大学 一种基于选区激光熔化成形大块体铁基非晶的方法

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GB2098112A (en) * 1981-04-27 1982-11-17 Kennametal Inc Casting incorporating hard, e.g. wear-resistant, insert
US5066546A (en) * 1989-03-23 1991-11-19 Kennametal Inc. Wear-resistant steel castings
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US20070128462A1 (en) * 2003-08-20 2007-06-07 F.A.R. - Fonderie Acciaierie Roiale-Spa Method to produce an element subject to wear, and element subject to wear thus obtained
US20080008894A1 (en) * 2006-07-06 2008-01-10 Siemens Power Generation, Inc. Rapid prototyping of ceramic articles

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DE4214524A1 (de) * 1991-05-06 1992-12-24 Karl Lange Eingiesskoerper
US5267600A (en) * 1992-01-21 1993-12-07 Deere & Company Hard facing casting surfaces with wear-resistant sheets
US8007373B2 (en) * 2009-05-19 2011-08-30 Cobra Golf, Inc. Method of making golf clubs
IT1401763B1 (it) * 2010-07-09 2013-08-02 Far Fonderie Acciaierie Roiale S P A Procedimento per la produzione di un elemento soggetto ad usura, elemento soggetto ad usura e struttura di aggregazione temporanea per la realizzazione di tale elemento soggetto ad usura

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GB2098112A (en) * 1981-04-27 1982-11-17 Kennametal Inc Casting incorporating hard, e.g. wear-resistant, insert
US5066546A (en) * 1989-03-23 1991-11-19 Kennametal Inc. Wear-resistant steel castings
US20040216860A1 (en) * 2003-04-16 2004-11-04 Rolf Pfeifer Ceramic casting mold for casting metal and process for production thereof
US20070128462A1 (en) * 2003-08-20 2007-06-07 F.A.R. - Fonderie Acciaierie Roiale-Spa Method to produce an element subject to wear, and element subject to wear thus obtained
US20080008894A1 (en) * 2006-07-06 2008-01-10 Siemens Power Generation, Inc. Rapid prototyping of ceramic articles

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10173258B2 (en) 2014-04-30 2019-01-08 Daido Steel Co., Ltd. Steel for mold, and mold
CN105618751B (zh) * 2015-12-16 2018-03-27 伊特克斯惰性气体系统（北京）有限公司 一种超高纯气氛保护的选择性激光熔化系统
CN105618751A (zh) * 2015-12-16 2016-06-01 伊特克斯惰性气体系统（北京）有限公司 一种超高纯气氛保护的选择性激光熔化系统
DE102016211358A1 (de) * 2016-06-24 2017-12-28 Bayerische Motoren Werke Aktiengesellschaft Gussbauteil sowie Verfahren zur Herstellung eines Gussbauteils
CN106041031A (zh) * 2016-07-29 2016-10-26 河海大学常州校区 一种铸件表面高熵合金涂层的制备方法
EP3706981A4 (en) * 2017-11-10 2021-10-27 Divergent Technologies Inc. STRUCTURES AND PROCESSES FOR LARGE VOLUME PRODUCTION OF COMPLEX STRUCTURES USING INTERFACE NUDS
WO2019094210A1 (en) 2017-11-10 2019-05-16 Divergent Technologies, Inc. Structures and methods for high volume production of complex structures using interface nodes
CN109759583A (zh) * 2017-11-10 2019-05-17 戴弗根特技术有限公司 结构和用于使用接口节点来高产量生产复杂结构的方法
US11786971B2 (en) 2017-11-10 2023-10-17 Divergent Technologies, Inc. Structures and methods for high volume production of complex structures using interface nodes
JP2021502269A (ja) * 2017-11-10 2021-01-28 ダイバージェント テクノロジーズ， インコーポレイテッドＤｉｖｅｒｇｅｎｔ Ｔｅｃｈｎｏｌｏｇｉｅｓ， Ｉｎｃ． インタフェ−スノードを使用した複雑な構造の大量生産のための構造と方法
JP7182620B2 (ja) 2017-11-10 2022-12-02 ダイバージェント テクノロジーズ， インコーポレイテッド インタフェ－スノードを使用した複雑な構造の大量生産のための構造と方法
WO2019152100A1 (en) * 2018-01-31 2019-08-08 Divergent Technologies, Inc. Systems and methods for co-casting of additively manufactured interface nodes
US11420262B2 (en) 2018-01-31 2022-08-23 Divergent Technologies, Inc. Systems and methods for co-casting of additively manufactured interface nodes
JP2021511966A (ja) * 2018-01-31 2021-05-13 ダイバージェント テクノロジーズ， インコーポレイテッドＤｉｖｅｒｇｅｎｔ Ｔｅｃｈｎｏｌｏｇｉｅｓ， Ｉｎｃ． 付加製造された界面ノードを共鋳造するためのシステムおよび方法
CN110090940A (zh) * 2018-01-31 2019-08-06 戴弗根特技术有限公司 用于共同铸造增材制造的接口节点的系统和方法
CN113290230A (zh) * 2020-02-24 2021-08-24 北京兆牌科技发展有限公司 铸造产品预布置硬面、硬点设计方法及相应铸件
CN113000822A (zh) * 2021-02-03 2021-06-22 邯郸慧桥复合材料科技有限公司 一种陶瓷强化Fe-B合金及其制备方法

Also Published As

Publication number Publication date
EP2916978B1 (en) 2018-11-07
ES2710100T3 (es) 2019-04-23
CA2884928C (en) 2020-09-29
TR201901636T4 (tr) 2019-02-21
ITUD20120159A1 (it) 2014-03-15
EP2916978A2 (en) 2015-09-16
WO2014041409A3 (en) 2014-06-12
CA2884928A1 (en) 2014-03-20
WO2014041409A2 (en) 2014-03-20
BR112015005687A2 (pt) 2017-10-10
PT2916978T (pt) 2019-02-08

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