WO2016152967A1 - Élément coulissant et structure coulissante - Google Patents

Élément coulissant et structure coulissante Download PDF

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Publication number
WO2016152967A1
WO2016152967A1 PCT/JP2016/059355 JP2016059355W WO2016152967A1 WO 2016152967 A1 WO2016152967 A1 WO 2016152967A1 JP 2016059355 W JP2016059355 W JP 2016059355W WO 2016152967 A1 WO2016152967 A1 WO 2016152967A1
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Prior art keywords
sliding
component
less
sliding component
present
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PCT/JP2016/059355
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English (en)
Japanese (ja)
Inventor
精心 上田
久保田　邦親
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日立金属株式会社
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Priority to CN201680018301.4A priority Critical patent/CN107429356B/zh
Priority to JP2017508417A priority patent/JP6424951B2/ja
Priority to KR1020177026781A priority patent/KR20170118904A/ko
Priority to EP16768870.4A priority patent/EP3276031A4/fr
Publication of WO2016152967A1 publication Critical patent/WO2016152967A1/fr

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    • 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
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
    • 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
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • 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
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/34—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of silicon
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • 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
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/004—Dispersions; Precipitations

Definitions

  • the present invention relates to a sliding component used in various sliding environments such as an oil ring and a cam lobe incorporated in an internal combustion engine. Then, the present invention relates to a sliding structure such as an internal combustion engine configured by incorporating these sliding parts.
  • sliding parts constituting sliding structures such as oil rings, cam lobes, tappets, piston pins, cylinder liners, mission gears, thrust plates and vanes, which are constituent parts of internal combustion engines, are made of JIS steel as the material.
  • SUJ2 and SKD11 which have been used have been used.
  • SKD11 is a steel type that can achieve a high hardness of 60 HRC or higher by quenching and tempering, and also has abundant carbides in the structure, and therefore has excellent wear resistance.
  • die die which gave the sliding characteristic (self-lubrication characteristic) excellent in the raw material and improved abrasion resistance by improving the component composition of the raw material is proposed (patent document 1).
  • the press die disclosed in Patent Document 1 has excellent wear resistance due to its self-lubricating properties. However, it has not been considered to apply the material of the press die of Patent Document 1 to the components of the internal combustion engine.
  • An object of the present invention is to provide a sliding part having excellent wear resistance. And it is providing the sliding structure which comprised this sliding component.
  • the present invention in mass%, C: 0.7-1.6%, Si: 0.5-3.0%, Mn: 0.1-3.0%, P: 0.05% or less, S : 0.01 to 0.12%, Ni: 0.3 to 1.5%, Cr: 7.0 to 13.0%, one or two of Mo and W: (Mo + 1 / 2W)
  • Mo + 1 / 2W 0.5 to 1.7%
  • Al 0.10 to 0.70%
  • Nb 0 to 0.30 %
  • Remaining Fe and impurities and a hardness of 52 HRC or more and less than 58 HRC.
  • the present invention is configured such that the above-described sliding component of the present invention slides with the sliding surface of the mating component in an environment where lubricating oil is present on the sliding surface of the sliding component. It is a sliding structure characterized by these.
  • the wear resistance of the sliding part can be improved.
  • the sliding component of the present invention is, in mass%, C: 0.7 to 1.6%, Si: 0.5 to 3.0%, Mn: 0.1 to 3.0%, P: 0.05% or less, S: 0.01 to 0.12%, Ni: 0.3 to 1.5%, Cr: 7.0 to 13.0%, one or two of Mo and W : 0.5 to 1.7% in the relational expression of (Mo + 1 / 2W), V: 0 to 0.70%, Cu: 0.1 to 1.0%, Al: 0.10 to 0.70%, Nb: 0 to 0.30%, balance Fe and impurity components.
  • the sliding component of the present invention is characterized by “co-addition of S and Cu” which greatly contributes to the expression of the self-lubricating property.
  • S and Cu are elements that are not actively added in most steel materials because they are elements that inhibit the hot workability of steel materials.
  • the effect of the component composition of the sliding component of the present invention will be described.
  • C 0.7 to 1.6% by mass (hereinafter simply referred to as “%”)
  • C is an element that dissolves in the base and imparts strength to the sliding component. Moreover, it is an element which forms carbide and enhances the wear resistance and seizure resistance of the sliding component.
  • C is set to 0.7 to 1.6%. Preferably it is 0.9% or more. Moreover, Preferably it is 1.3% or less. More preferably, the content is 1.1% or less.
  • Si is an element that improves the high-temperature softening characteristics of the sliding component.
  • Si is 0.5 to 3.0%.
  • it is 0.9% or more.
  • it is preferably 2.0% or less. More preferably, it is 1.5% or less. More preferably, it is 1.1% or less.
  • Mn is an element that enhances hardenability. However, if too much, the machinability deteriorates. Therefore, Mn is set to 0.1 to 3.0%. Preferably it is 0.3% or more. More preferably, it is 0.4% or more. Further, it is preferably 1.0% or less. More preferably, it is 0.6% or less.
  • P is an element contained inevitably even if it does not usually add. And it is an element which inhibits the toughness of a sliding component. Therefore, it is made 0.05% or less. Preferably it is 0.03% or less. More preferably, the content is 0.02% or less.
  • ⁇ S: 0.01-0.12% S is an element that contributes to the improvement of the self-lubricating property of the sliding component of the present invention together with Cu described later.
  • This inventor investigated the phenomenon which has arisen on the sliding surface, when the sliding component which has the component composition of patent document 1 was used in the environment where lubricating oil intervened in the sliding surface. As a result, during this use, when the sliding surfaces of the sliding part and the mating part come into contact with each other at such a high surface pressure that the seizure occurs, organic components in the lubricating oil adsorbed on the sliding surface of the sliding part Has been dehydrogenated, and this has been found to change to substances such as diamond and graphite.
  • graphite intercalation compounds having a structure in which sulfate ions or sulfuric acid molecules are periodically sandwiched improve the self-lubricating properties of the sliding parts, so It was found that the friction coefficient can be kept low.
  • S in the sliding part is oxidized on the sliding surface in use to generate sulfate ions.
  • the generated sulfate ions are sandwiched between the graphite layers to promote the formation of the graphite intercalation compound.
  • the generated sulfate ions combine with the hydrogen ions generated by the dehydrogenation of the lubricating oil to form sulfuric acid molecules, which are sandwiched between the graphite layers to promote the formation of the graphite intercalation compounds. .
  • This increases the interplanar spacing of the graphite in the C-axis direction, suppresses the graphite from undergoing an allotropic transformation into diamond in a nano-level state, increases the degree of freedom of sliding, and improves the lubricity.
  • S is set to 0.01 to 0.12%. Preferably it is 0.03% or more. More preferably, it is 0.04% or more. More preferably, it is 0.05% or more. Moreover, Preferably it is 0.09% or less. More preferably, it is 0.08% or less.
  • Ni is an element that contributes to the maintenance of the hardness of the sliding component by binding to Al, which will be described later, in the quenching and tempering process, thereby precipitating a Ni—Al intermetallic compound.
  • Ni is set to 0.3 to 1.5%.
  • it is 0.4% or more.
  • it is preferably 1.0% or less. More preferably, it is 0.8% or less. More preferably, it is 0.6% or less.
  • Cr is an element that enhances the hardenability of the base. Moreover, it is an element which forms the above-mentioned C and a carbide
  • Mo and W are elements that form fine carbides in the structure after quenching and tempering and impart fatigue strength to the sliding component. However, if too much, machinability and toughness are reduced. Mo and W can be added alone or in combination. The addition amount at this time can be defined together by the relational expression of (Mo + 1 / 2W) since W is an atomic weight approximately twice that of Mo.
  • the value of (Mo + 1 / 2W) is 0.5 to 1.7%. Preferably it is 0.7% or more. More preferably, it is 0.9% or more. More preferably, it is 1.0% or more. Further, it is preferably 1.5% or less. More preferably, it is 1.3% or less. More preferably, it is 1.2% or less.
  • V can be contained for improving hardenability.
  • V forms hard VC carbide, the inclusion of excess V inhibits machinability. Therefore, in the present invention, even when V is contained, the content is made 0.70% or less.
  • it is 0.50% or less. More preferably, it is 0.30% or less. More preferably, it is 0.20% or less.
  • Cu 0.1 to 1.0%
  • Cu is an element that contributes to the improvement of the self-lubricating characteristics of the sliding component of the present invention. That is, Cu is an element that exhibits a catalytic action for producing the above-mentioned “graphite intercalation compound”. Cu can deposit a very small amount on the sliding surface of the sliding part after quenching and tempering. Then, Cu deposited on the sliding surface has a function of a catalyst that promotes the formation of the above-mentioned “graphite intercalation compound”. However, when Cu is contained excessively, red hot embrittlement of the material is caused and hot workability is deteriorated. Therefore, Cu is made 0.1 to 1.0%. Preferably it is 0.2% or more. More preferably, it is 0.3% or more. Further, it is preferably 0.8% or less. More preferably, it is 0.6% or less. More preferably, it is 0.5% or less.
  • Al is an element that combines with the above Ni to form a Ni—Al-based intermetallic compound and contributes to maintaining the hardness of the sliding component.
  • Al is made 0.10 to 0.70%.
  • it is 0.15% or more. More preferably, it is 0.25% or more.
  • it is 0.50% or less. More preferably, it is 0.45% or less.
  • Nb like V
  • Nb can be contained to improve hardenability.
  • excessive Nb content inhibits machinability. Therefore, in the present invention, even when Nb is contained, the content is made 0.30% or less. Preferably it is 0.20% or less. More preferably, it is 0.15% or less.
  • a preferable content for obtaining the above effect is 0.03% or more. More preferably, it is 0.05% or more. More preferably, it is 0.07% or more.
  • the self-lubricating property of the sliding component of the present invention is exhibited by utilizing the “deformation behavior due to friction” of the lubricating oil present on the sliding surface. Therefore, in order to develop the self-lubricating characteristics according to the present invention, it is only necessary to intervene with a counterpart component in use, for example, a hydrocarbon-based lubricating oil. Material) can be selected.
  • the sliding component of the present invention has a hardness of 52 HRC or more and less than 58 HRC.
  • the conventional sliding component has been adjusted to a hardness of 60 HRC or higher.
  • the sliding component of the present invention has higher fatigue strength than the conventional SKD11 due to the above-described component composition.
  • the value of the fatigue strength improves more notably by reducing the hardness of a sliding component moderately. That is, as shown in FIG. 1, the conventional SKD11 (x mark in FIG. 1) had a fatigue strength of about 560 MPa when adjusted to 60 HRC, which is the hardness of a general sliding component.
  • the fatigue strength value increases only to about 600 MPa even if the hardness is lowered.
  • the fatigue strength value shows a high fatigue strength of about 630 MPa when the hardness is lowered to 58 HRC. Thereafter, the high fatigue strength is maintained in a low hardness region.
  • the friction coefficient in use exhibited by the sliding component is effectively reduced as the fatigue strength value of the sliding component increases, and the present invention Lubricating characteristics are synergistically improved (see FIG. 3).
  • the present invention aims at a sliding component having a fatigue strength exceeding 600 MPa, which is difficult to achieve with the conventional SKD11.
  • the fatigue strength is preferably over 630 MPa.
  • the hardness of the sliding component of this invention shall be less than 58HRC as a range which can achieve this fatigue strength exceeding 600 MPa easily. Preferably it is 57 HRC or less.
  • the sliding component of the present invention when used, assuming that the hardness of the counterpart component is high, it is not a good idea to reduce the hardness of the sliding component of the present invention.
  • SUJ2 which is a bearing steel of the JIS steel type, is used as the mating part, the hardness is usually adjusted to 60 to 62 HRC, which is higher than the sliding part of the present invention.
  • SUJ2 is a “high carbon chrome bearing steel” standardized by JIS-G-4805, and its component composition is as follows in mass%. C: 0.95 to 1.10%, Si: 0.15 to 0.35%, Mn: 0.50% or less, P: 0.025% or less, S: 0.025% or less, Cr: 1. 30 to 1.60%, remaining Fe and impurities
  • the sliding surface of the counterpart component slides with the sliding surface of the counterpart component in an “intermittent” contact mode such as rotation or reciprocation.
  • the applied Hertz stress increases.
  • this Hertz stress exceeds the fatigue strength of the sliding component, fine plastic deformation occurs on the sliding surface.
  • the sliding wear of the sliding parts is induced, the friction coefficient between the sliding surfaces is increased, and the self-lubricating property of the present invention is hindered. Therefore, the lower limit of the hardness of the sliding component of the present invention is 52 HRC. In this lower limit, it is preferably 53 HRC.
  • a metal material such as SUJ2 can be used as the material of the counterpart part, and a long-life sliding structure that achieves both suppression of seizure (adhesion) damage and improvement of fatigue life The body mechanism can be obtained.
  • Sample No. in Table 1 Respective sliding parts 1 and 2 having component compositions of 1 and 2 were prepared.
  • Sample No. 2 is SKD11.
  • each of the sliding parts 1 and 2 those in which the target hardness was adjusted to three types of A: 50 HRC, B: 55 HRC, and C: 60 HRC were prepared.
  • the actual hardness of each sliding component is 50.4 HRC for sliding component 1-A, 56.2 HRC for 1-B, 62.0 HRC for 1-C, 50.0 HRC for 2-A, 2-B was 55.8 HRC and 2-C was 61.0 HRC.
  • the sliding component 2-C made of SKD11 having a target hardness of 60 HRC corresponds to a conventional sliding component.
  • the fatigue strength of these sliding parts was measured. The fatigue strength was measured by processing each sliding part into a rotating bending fatigue test piece and performing an Ogoshi type rotating bending fatigue test on this.
  • the surface stress of the test piece was adjusted by adjusting the secondary moment of the cross section determined from the shape of the test piece and adjusting the weight of the weight suspended in the center of the parallel part of the test piece.
  • the stress amplitude was set so that the tensile stress and the compressive stress were equal in one rotation of the specimen (referred to as an amplitude ratio ⁇ 1).
  • the rotation speed of the test piece was 50 Hz (3,000 rpm).
  • rupture of a rotation bending fatigue test piece was made into fatigue strength. The results are shown in FIG.
  • the sliding components 2-A, 2-B, and 2-C which have component compositions that do not exhibit self-lubricating properties, have increased friction coefficients and measured friction coefficient values exceeding 0.30. .
  • seizure occurred before the sliding distance reached 100 m, and the friction coefficient rapidly increased.
  • sliding parts 1-A, 1-B, and 1-C which are component compositions that exhibit self-lubricating properties, did not cause seizure during a sliding distance of 100 m.
  • the sliding components 1-A and 1-B maintained the coefficient of friction therebetween being 0.30 or less.
  • the sliding component 1-B of the present invention in which the hardness is adjusted to “52 HRC or more and less than 58 HRC” synergistically improves the self-lubricating characteristics, The coefficient of friction was further reduced, and the value was 0.20 or less.
  • FIG. 3 shows the relationship between the fatigue strength of each sliding component and the sliding distance when the friction coefficient measured above reaches 0.20.
  • the value of the friction coefficient of “0.20” is an index of the friction coefficient when the sliding component exhibits a synergistic self-lubricating property under the test conditions of this example.
  • the sliding component 1-B of the present invention has a fatigue strength of over 600 MPa. Even when the sliding distance reached 100 m, a low coefficient of friction of 0.20 or less was maintained (in FIG. 3, for convenience, it is shown at the position “100 m”).
  • the sliding component 1-B of the present invention has improved self-lubricating properties (smaller friction coefficient) than the sliding components 1-A and 1-C, and the improved self-lubricating properties are: It was stably maintained over a long sliding distance.

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  • 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)
  • Sliding-Contact Bearings (AREA)
  • Lubricants (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention porte sur un élément coulissant qui a une excellente résistance à l'usure. L'invention porte également sur une structure coulissante qui est pourvue de cet élément coulissant. L'élément coulissant selon la présente invention a une composition des constituants contenant, en % en masse, 0,7 à 1,6 % de C, 0,5 à 3,0 % de Si, 0,1 à 3,0 % de Mn, 0,05 % ou moins de P, 0,01 à 0,12 % de S, 0,3 à 1,5 % de Ni, 7,0 à 13,0 % de Cr, du Mo et/ou du W en quantités telles que (Mo + 1/2W) vaut 0,5 à 1,7 %, 0 à 0,70 % de V, 0,1 à 1,0 % de Cu, 0,10 à 0,70 % d'Al et 0 à 0,30 % de Nb, le reste étant constitué de Fe et d'impuretés, et a une dureté Rockwell C supérieure ou égale à 52 HRC mais inférieure à 58 HRC. La structure coulissante selon la présente invention est conçue de façon telle que l'élément coulissant décrit ci-dessus est en contact coulissant avec une surface de coulissement d'un élément homologue dans une environnement où un lubrifiant est présent sur une surface de coulissement de cet élément coulissant.
PCT/JP2016/059355 2015-03-26 2016-03-24 Élément coulissant et structure coulissante WO2016152967A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201680018301.4A CN107429356B (zh) 2015-03-26 2016-03-24 滑动构造体
JP2017508417A JP6424951B2 (ja) 2015-03-26 2016-03-24 摺動部品および摺動構造体
KR1020177026781A KR20170118904A (ko) 2015-03-26 2016-03-24 슬라이딩 부품 및 슬라이딩 구조체
EP16768870.4A EP3276031A4 (fr) 2015-03-26 2016-03-24 Élément coulissant et structure coulissante

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JP2015064365 2015-03-26
JP2015-064365 2015-03-26

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018056282A1 (fr) * 2016-09-20 2018-03-29 日立金属株式会社 Élément coulissant, structure coulissante et procédé de coulissement de structure coulissante
JP6472938B1 (ja) * 2017-10-30 2019-02-20 Ｔｐｒ株式会社 圧力リング、内燃機関、圧力リング用線材および圧力リング用線材の製造方法
WO2019087562A1 (fr) * 2017-10-30 2019-05-09 Ｔｐｒ株式会社 Bague de pression, moteur à combustion interne, fil machine pour bague de pression, et procédé de fabrication de fil machine pour bague de pression

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CN115927967A (zh) * 2022-12-22 2023-04-07 美利林科技(攀枝花)有限公司 一种球磨机用高韧性钢锻及其制备工艺

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EP3276031A1 (fr) 2018-01-31
CN107429356A (zh) 2017-12-01
JPWO2016152967A1 (ja) 2017-11-02
EP3276031A4 (fr) 2018-12-19

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