WO2008004585A1 - Élément obtenu par forgeage de poudre, mélange de poudre destiné au forgeage de poudre, procédé destiné à produire un élément par forgeage de poudre et tige de raccord pour séparation par rupture obtenue par ce procédé - Google Patents
Élément obtenu par forgeage de poudre, mélange de poudre destiné au forgeage de poudre, procédé destiné à produire un élément par forgeage de poudre et tige de raccord pour séparation par rupture obtenue par ce procédé Download PDFInfo
- Publication number
- WO2008004585A1 WO2008004585A1 PCT/JP2007/063377 JP2007063377W WO2008004585A1 WO 2008004585 A1 WO2008004585 A1 WO 2008004585A1 JP 2007063377 W JP2007063377 W JP 2007063377W WO 2008004585 A1 WO2008004585 A1 WO 2008004585A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- powder
- forging
- less
- forged member
- machinability
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/14—Making machine elements fittings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
- B21K1/766—Connecting rods
-
- 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
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/12—Both compacting and sintering
- B22F3/16—Both compacting and sintering in successive or repeated steps
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/17—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by forging
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0264—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements the maximum content of each alloying element not exceeding 5%
-
- 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
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- 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
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
- F16C7/02—Constructions of connecting-rods with constant length
- F16C7/023—Constructions of connecting-rods with constant length for piston engines, pumps or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/04—Connecting-rod bearings; Attachments thereof
- F16C9/045—Connecting-rod bearings; Attachments thereof the bearing cap of the connecting rod being split by fracturing
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2142—Pitmans and connecting rods
Definitions
- the present invention relates to a powder forged member obtained by pre-molding a mixed powder, then sintering, and then forged, a mixed powder for powder forging and a method for producing the powder forged member, and the powder forged member.
- the present invention relates to a split split connecting rod to be manufactured.
- Patent Document 1 Japanese Patent Laid-Open No. 61-117203
- Patent Document 2 JP-A-60-169501
- the present invention provides a powder forged member capable of improving fatigue strength while ensuring machinability without increasing the hardness and ensuring self-alignment after fracture division, a manufacturing method thereof, and It is an object of the present invention to provide a fracture split type connecting rod using the powder forged member.
- a first aspect of the present invention is a powder forged member obtained by forging a sintered preform formed by pre-molding a mixed powder and then sintering it at a high temperature, and firing at the start of forging.
- the percentage of free Cu in the consolidated preform is 10% or less, and the component composition after forging is mass%, C: 0.2 to 0.4%, Cu: 3 to 5%, Mn: 0.5
- the relative density with respect to the theoretical density is preferably 97% or more.
- the hardness is HRC33 or less and the single-sided tensile fatigue limit is 325 MPa or more.
- the powder forged material selected from the group consisting of MnS, MoS, B 2 O and BN
- the total amount of at least one machinability improving material is preferably 0.05 to 0.6% by mass.
- a second aspect of the present invention is a fracture split type connecting rod characterized by being manufactured using the powder forged member of the first aspect.
- a third aspect of the present invention is used as a raw material for the powder forged member of the first aspect.
- the component composition of the mixed powder, excluding the lubricant, is% by mass, C: 0.1 to 0.5%, Cu: 3 to 5%, Mn: 0.4% or less (including 0) 0: 0.3% or less, the balance iron and unavoidable impurities are mixed powders for powder forging.
- the mixed powder for powder forging is, in mass%, C: less than 0.05%, 0: 0.3% or less, iron-based powder consisting of iron and inevitable impurities, graphite powder and copper powder And a lubricant are preferably added.
- a fourth aspect of the present invention is a mixed powder used as a raw material for the powder forged member of the first aspect, wherein the component composition of the portion excluding the lubricant is in mass%, and C: 0 1 to 0.5%, Cu: 3 to 5%, Mn: 0.4% or less (excluding 0), 0: 0.3% or less, and MnS, MoS, BO and BN force At least one machinability improvement selected from the group
- the mixed powder for powder forging is, by mass%, C: less than 0.05%, 0: 0.3% or less, iron-based powder composed of iron and inevitable impurities, graphite powder, and copper powder.
- C less than 0.05%
- 0 0.3% or less
- iron-based powder composed of iron and inevitable impurities
- graphite powder graphite powder
- copper powder copper powder.
- At least one machinability improving material selected from the group consisting of O and BN force and a lubricant are added.
- a fifth aspect of the present invention is a method for producing a powder forged member according to the first aspect, wherein the mixed powder for powder forging according to the third aspect is preformed and then sintered and sintered.
- Excellent machinability and fatigue strength characterized by a forming and sintering process for forming a sintered preform and a forging process for forging the sintered preform at a high temperature to form a powder forged part
- a method for producing a powder forged member is characterized by a forming and sintering process for forming a sintered preform and a forging process for forging the sintered preform at a high temperature to form a powder forged part.
- a sixth aspect of the present invention is a method for producing a powder forged member according to the first aspect, wherein the mixed powder for powder forging according to the fourth aspect is preformed and then sintered and sintered.
- Excellent machinability and fatigue strength characterized by a forming and sintering process for forming a sintered preform and a forging process for forging the sintered preform at a high temperature to form a powder forged part
- a method for producing a powder forged member is a method for producing a powder forged member.
- the Cu content is reduced.
- the percentage of free Cu in the sintered preform at the start of forging was limited.
- soft ferrite increases due to the decrease in the C content and the increase in hardness is suppressed, so that machinability can be ensured and toughness is maintained and self-alignment after fracture splitting can be secured.
- Became Furthermore, the increase in Cu content and the restriction on the free Cu ratio increased the amount of Cu diffused in the ferrite and promoted solid solution strengthening, so the fatigue strength was greatly improved. In addition, cracking during forging can be prevented by limiting the free Cu ratio.
- FIG. 1 shows the shape and dimensions of a test piece of a powder forged member used in a fatigue test of an example.
- A is a perspective view
- (b) is a cross-sectional view showing a cross section taken along line AA.
- FIG. 2 is a sectional view showing a state in which a tensile load is applied to a test piece of a powder forged member in a fatigue test.
- FIG. 3 is a graph showing the relationship between the free Cu ratio and the fatigue limit.
- FIG. 4 is a cross-sectional view showing a microstructure of a powder forged member.
- the configuration of the powder forged member according to the present invention that is, the component composition, structure, density, and reason for limiting the free Cu ratio in the sintered preform will be described.
- C is an indispensable element for securing the strength of the steel.
- increasing the C content reduces the ferrite in the steel structure and increases the pearlite, thereby increasing the hardness of the steel. The strength was increased.
- the C content is reduced to 0.4% or less, contrary to the conventional case, in order to suppress the increase in the hardness of the base iron.
- the C content is 0.2 to 0.4%.
- Cu dissolves in the ferrite phase of the steel structure during heating for sintering and forging, resulting in solid solution strength. It is an element that improves the strength of the iron base by precipitating partly during cooling.
- the solid solubility limit in the ferrite phase near the eutectoid temperature of Fe-C system is 2%. Most of the examples were used at a certain level.
- the solid solubility limit of Cu in the austenite phase is about 8%.
- the present invention a larger amount of Cu is dissolved in the austenite phase than in the conventional product, and the solid solution strengthening of the fly phase formed in the cooling process is achieved. If the Cu content is less than 3.0%, the desired solid solution strengthening effect cannot be fully achieved.On the other hand, if it exceeds 5.0%, free Cu tends to remain, and the free Cu ratio is 10% or less. In order to limit to this, it is necessary to lengthen the heating time such as extending the sintering time, so the productivity is lowered. Therefore, the Cu content is 3-5%. Preferably it is 3-4%.
- Mn 0.5% or less (excluding 0)
- Mn is an element useful for improving the strength of the base iron by increasing the hardenability while having the deoxidizing action of the base iron.
- Mn easily reacts with oxygen in the atmosphere during the powder manufacturing process or the sintering process of preforms, which has a high affinity for oxygen, and forms an oxide. If it exceeds the upper limit, it becomes difficult to reduce the Mn oxide, and the deterioration of the quality characteristics of the powder forged member such as a decrease in density and strength due to the Mn oxide becomes remarkable. Therefore, the Mn content is 0.5% or less (excluding 0). Preferably, it is 0.4% or less (excluding 0).
- the powder forged member according to the present invention may contain P, S, Si, 0, N and other elements as inevitable impurities.
- the ratio of free Cu in the sintered preform at the start of forging is set to 10% or less.
- the free Cu percentage refers to the percentage of Cu undissolved in the ground iron in the total amount of added Cu, and can be quantified by the following method.
- the sintered preform which is the member to be measured, is cross-sectioned with paper and puff and then corroded with picric acid.
- the range of 0.2 mm X O Take a picture and measure the total area of the copper-colored part by image processing.
- the total area of the copper-colored part of the reference material is measured in the same way.
- a reference material a molded product molded under the same conditions as the above-mentioned member to be measured, component composition, shape, and molding pressure, the condition of 1000 ° C and 20 min where Cu does not substantially dissolve in the ground iron Use the one sintered in step 1.
- the ferrite ratio in the powder forged member is less than 40%, the toughness is insufficient and sufficient self-alignment after fracture splitting cannot be obtained.On the other hand, if it exceeds 90%, the toughness becomes too high and the elongation increases. For this reason, it deforms at the time of fracture division and the dimensional accuracy deteriorates. Therefore, the ferrite ratio in the powder forged member is 40-90%.
- the relative density with respect to the theoretical density of the powder forged member is preferably 97% or more.
- the powder forged member has a hardness of HRC33 or less and a swing swing fatigue limit of 325 MPa or more, and a powder forged member having excellent fatigue strength while ensuring machinability can be obtained.
- Machinability improving material 0.05 to 0.6% in total amount
- a machinability improving material may be added during preforming (that is, to the powder mixture for powder forging).
- the machinability improver for example, MnS, MoS, B 2 O, or BN powder can be used, and these can be used alone.
- the total amount of the machinability improving material is less than 0.05%, sufficient machinability improving effect cannot be obtained, while if it exceeds 0.6%, the occupation area of the iron material decreases.
- the increase in non-metal that becomes the starting point of fatigue cracks It shows a tendency that the fatigue strength is greatly reduced. Accordingly, the total amount of the machinability improving material is preferably 0.05 to 0.6%.
- the oxygen content in the mixed powder and the type of atmospheric gas during sintering should be set so that the C content of the finally obtained powder forged member is 0.2 to 0.4%. It is necessary to adjust in consideration.
- an inert gas atmosphere such as N gas is used in the sintering process.
- the sintered preform (that is, the powder forged member) has a lower c content than the mixed powder.
- the content is adjusted to be higher than 0.2% and lower than 0.5%, which is higher than the C content of powder forged parts.
- carburization with atmospheric gas usually proceeds more than the consumption of C by oxygen in the mixed powder, and the sintered preform (i.e. Since the C content of the powder forged member is higher than that of the mixed powder, the C content of the mixed powder is adjusted to 0.1% or more and less than 0.4%, which is lower than the C content of the powder forged member. Therefore, if the C content of the mixed powder is in the range of 0.1 to 0.5%, the change of the C content can be predicted and set according to the oxygen content of the mixed powder and the type of sintering atmosphere gas. Oh ,.
- the oxygen content in the mixed powder increases, the variation in the amount of C consumed also increases, making it difficult to adjust the C content of the powder forged parts to the target 0.2 to 0.4%.
- the oxygen content shall be 0.3% or less.
- the content of each of these components in the mixed powder is the content of each of these components in the powder forged member. (Strictly speaking, the value of the content of each of these components is in a negligible range due to the increase or decrease in the amount of C during sintering.)
- the change in the C content during sintering is predicted according to the oxygen content in the iron-based powder and the type of sintering atmosphere gas, and the C content after sintering is 0.
- the iron-based powder used for the preparation of the mixed powder is hard! And the density of the preform is difficult to increase at the time of preforming. Even if it is acidified to the inside and forged, a phenomenon occurs in which the strength decreases due to the acid film. Therefore, in order to soften the iron-based powder to increase the density of the preform and prevent internal oxidation, the C content of the iron-based powder is less than 0.05%, preferably not more than 0.04%, more preferably 0.02% or less.
- this molded preform is sintered at a high temperature to produce a sintered preform.
- the sintering conditions are preferably as the temperature is higher and the time is longer, because the diffusion of Cu proceeds and the amount of free Cu decreases.
- the Cu content is 4%, it is 1190 ° C or higher.
- the free Cu ratio can be reduced to 10% or less.
- the sintered preform is immediately forged at a predetermined forging pressure at a high temperature without cooling, thereby obtaining a powder forged member.
- the higher the forging pressure the higher the density of the powder forged member and the higher the strength.
- forging with a surface pressure of 6. OtonZcm 2 or more forging with a surface pressure of 6. OtonZcm 2 or more.
- the relative density with respect to the theoretical density can be set to 97% or more, and a powder forged member having excellent machinability and fatigue strength can be obtained.
- the fracture split type connecting rod manufactured using this powder forged member reduces tool wear during machining, suppresses an increase in component cost, has excellent fatigue strength, and further breaks.
- the self-alignment at the time of assembly after splitting will also be excellent.
- Graphite powder and copper powder are added to pure iron powder iron-base powder with the composition shown in Table 1 so that the C content after sintering is 0.3% and the Cu content power, and stearic acid is used as a lubricant.
- Zinc was added in an amount of 0.75% and mixed for 30 minutes to prepare a mixed powder, which was preformed at a molding surface pressure of 6 ton / cm 2 to prepare a molded preform.
- the molded preform was demolded at 600 ° C for 10 minutes in an N gas atmosphere.
- the fly rate of the powder forged member was about 70% even at the different sintering temperatures.
- the pure iron powder iron-base powder having the composition shown in Table 1 as in Example 1 above was subjected to graphite so that the c content after forging was 0.1 to 0.6% and the Cu content was 2 to 5%.
- a mixed powder was prepared by adding various amounts of powder and copper powder, and the mixed powder was preformed under the same conditions as in Example 1 to prepare a molded preform. And this molded preform
- this specimen is pulled and fractured in a direction perpendicular to the depth direction of the notch, and the actual area including the micro unevenness of the fracture surface is measured with an optical three-dimensional measuring device (manufactured by GFMesstechnik, model: MicroCAD 3 X 4) Calculate the ratio to the flat projected area that ignores the unevenness (referred to as the “breaking split area ratio”), and visually check the fracture cross-section after fracture splitting and whether there is any displacement. was investigated.
- Table 3 shows the test results.
- the percentage of free Cu in the test piece before forging (at the start of forging) was 10% or less for all of the test pieces No. 222 in which the Cu content exceeded 5%.
- the hardness is HRC33
- the fatigue limit is 300 MPa or more for all, and 325 MPa or more can be obtained except for some (test specimens Nos. 210 and 211). Accepted It was confirmed that there was no problem in self-alignment and that the machinability, fatigue strength, and self-alignment after fracture splitting were satisfied at the same time.
- the hardness is HRC33 or less except for a part (test pieces No. 230, 231).
- the fatigue limit does not reach 300MPa, and at the same time, deformation due to elongation occurs at the time of fracture split, resulting in a decrease in dimensional accuracy (test piece Nos. 201 to 209).
- the fatigue limit is 300MPa or more, the hardness is HRC33 As the machinability deteriorates and the misalignment of the fracture surface occurs and the self-alignment problem occurs, the powder satisfies the machinability, fatigue strength, and self-alignment after fracture splitting simultaneously. It is very difficult to obtain a forged member.
- the fracture split area ratio can be used as an index representing self-alignment, and if the fracture split area ratio is less than 1.37, any breakage of the fracture split surfaces is likely to occur. On the other hand, if it exceeds 1.51, deformation due to elongation becomes remarkable, and dimensional accuracy is likely to deteriorate.
- Example 2 the same composition (C: 0.3%, Cu: 3.5%) as the specimen No. 218 of Example 2 above, and only the forging pressure was varied in the range of 2.5 to LOtonZcm 2
- the other conditions were the same as in Example 2 above, and a test piece of the powder forged member was produced, and the influence of the relative density of the powder forged member on the fatigue limit was investigated.
- the HRB hardness of the specimen was also measured. Table 4 shows the test results.
- Example 3 the same component composition (C: 0.3%, Cu: 3.5%) as test piece No. 218 of Example 2 which is the same as Example 3 above, and various machinability improvers were added.
- a test piece of a powder forged member was prepared under the same conditions as in Example 2 except that the amount was changed, and the effect on machinability was investigated.
- the machinability is measured using a thruster of 5 mm in diameter when drilling from the surface of the specimen at a rotation speed of 200 rpm and a cutting speed of 0.12 mmZrev using a SKH drill of 5 mm in diameter, and this is used as an index of machinability. It was. Table 5 shows the measurement results.
- the oxygen content of the mixed powder was changed using iron-based powders with different oxygen contents.
- a test piece of a powder forged member was produced under the same conditions as in the first embodiment.
- the C content after forging is set to 0.3% and the Cu content is set to 4%.
- the C content is adjusted by adjusting the graphite powder addition amount to 0.3% + (iron-based powder oxygen Content% — 0.05%) X 3Z4.
- the C content and fatigue limit of this specimen were measured, and the effect of the oxygen content of the mixed powder on these was investigated.
- Table 6 shows the test results. As shown in the table, when the oxygen content of the iron-based powder (that is, the mixed powder) is 0.3% or less (test piece No. 501-503), the C content of the powder forged member is almost the target. However, if the oxygen content of the iron-based powder (that is, the mixed powder) exceeds 0.3% (Test No. 504), the C content of the powder forged member is the target. It can be seen that the C content force deviates greatly and falls outside the appropriate range (0.2 to 0.4%) of the C content specified in the present invention, and the fatigue strength is also greatly reduced.
- a mixed powder having the same component composition is prepared by adjusting the addition amount of graphite powder using iron-based powders having different C contents, and a molding preform and powder under the same conditions as in Embodiment 1 above.
- a test piece of a forged member was produced.
- the C content after forging was set to 0.3% and the Cu content was set to 4%.
- the density of the molded preform and the powder forged member and the fatigue limit of the powder forged member were measured.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- General Engineering & Computer Science (AREA)
- Forging (AREA)
- Powder Metallurgy (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN200780031476XA CN101506401B (zh) | 2006-07-06 | 2007-07-04 | 粉末锻造构件、粉末锻造用混合粉末和粉末锻造构件的制造方法及使用了它的裂解型连杆 |
US12/307,662 US20090311122A1 (en) | 2006-07-06 | 2007-07-04 | Powder forged member, powder mixture for powder forging, method for producing powder forged member, and fracture split type connecting rod using the same |
KR1020097002425A KR101186445B1 (ko) | 2006-07-06 | 2007-07-04 | 분말 단조 부재, 분말 단조용 혼합 분말, 분말 단조 부재의제조 방법 및 그것을 이용한 파단 분할형 커넥팅 로드 |
CA2658051A CA2658051C (en) | 2006-07-06 | 2007-07-04 | Powder forged member, powder mixture for powder forging, method for producing powder forged member, and fracture split type connecting rod using the same |
SE0900121A SE535027C2 (sv) | 2006-07-06 | 2007-07-04 | Pulversmidd detalj, pulverblandning för pulversmide, metod för tillverkning av pulversmidd detalj, och vevstake av brottdelningstyp användande densamma |
US13/826,320 US20130192414A1 (en) | 2006-07-06 | 2013-03-14 | Powder forged member, powder mixture for powder forging, method for producing powder forged member, and fracture split type connecting rod using the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006186927A JP4902280B2 (ja) | 2006-07-06 | 2006-07-06 | 粉末鍛造部材、粉末鍛造用混合粉末および粉末鍛造部材の製造方法ならびにそれを用いた破断分割型コンロッド |
JP2006-186927 | 2006-07-06 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/826,320 Division US20130192414A1 (en) | 2006-07-06 | 2013-03-14 | Powder forged member, powder mixture for powder forging, method for producing powder forged member, and fracture split type connecting rod using the same |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008004585A1 true WO2008004585A1 (fr) | 2008-01-10 |
Family
ID=38894552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/063377 WO2008004585A1 (fr) | 2006-07-06 | 2007-07-04 | Élément obtenu par forgeage de poudre, mélange de poudre destiné au forgeage de poudre, procédé destiné à produire un élément par forgeage de poudre et tige de raccord pour séparation par rupture obtenue par ce procédé |
Country Status (7)
Country | Link |
---|---|
US (2) | US20090311122A1 (ja) |
JP (1) | JP4902280B2 (ja) |
KR (1) | KR101186445B1 (ja) |
CN (1) | CN101506401B (ja) |
CA (1) | CA2658051C (ja) |
SE (1) | SE535027C2 (ja) |
WO (1) | WO2008004585A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010028470A2 (en) | 2008-09-12 | 2010-03-18 | Whirlpool S.A. | Metallurgical composition of particulate materials, self-lubricating sintered product and process for obtaining self-lubricating sintered products |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4789837B2 (ja) | 2007-03-22 | 2011-10-12 | トヨタ自動車株式会社 | 鉄系焼結体及びその製造方法 |
JP5588879B2 (ja) * | 2008-01-04 | 2014-09-10 | ジーケーエヌ シンター メタルズ、エル・エル・シー | プレアロイ銅合金粉末鍛造連接棒 |
JP5308123B2 (ja) | 2008-11-10 | 2013-10-09 | 株式会社神戸製鋼所 | 高強度組成鉄粉とそれを用いた焼結部品 |
JP5324979B2 (ja) * | 2009-03-27 | 2013-10-23 | 株式会社神戸製鋼所 | 疲労強度に優れた粉末鍛造品、粉末鍛造用混合粉末、および破断分割型コンロッド |
CN103691875B (zh) * | 2012-09-28 | 2015-08-05 | 刘福平 | 一种连杆衬套过盈装配方法 |
FR3020291B1 (fr) * | 2014-04-29 | 2017-04-21 | Saint Jean Ind | Procede de fabrication de pieces metalliques ou en composite a matrice metallique issues de fabrication additive suivie d'une operation de forgeage desdites pieces |
WO2016092827A1 (ja) | 2014-12-12 | 2016-06-16 | Jfeスチール株式会社 | 粉末冶金用鉄基合金粉末および焼結鍛造部材 |
JP6299714B2 (ja) * | 2015-09-24 | 2018-03-28 | マツダ株式会社 | 焼結鍛造品及びその製造方法 |
CN105983698A (zh) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | 一种叉车轮毂轴承的粉末锻造方法 |
CN105983691A (zh) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团振邺机械有限公司 | 一种叉车同步器齿环的粉末锻造方法 |
CN105952773A (zh) * | 2016-07-18 | 2016-09-21 | 安徽奥泰粉末冶金有限公司 | 一种粉末冶金汽车发动机连杆及其制备方法 |
JP6822308B2 (ja) * | 2017-05-15 | 2021-01-27 | トヨタ自動車株式会社 | 焼結鍛造部材 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58133301A (ja) * | 1982-02-01 | 1983-08-09 | Toyota Motor Corp | 焼結鍛造品の製造方法 |
JPS61117203A (ja) * | 1984-11-09 | 1986-06-04 | Toyota Motor Corp | 焼結鍛造品の製造方法 |
WO2002038314A1 (en) * | 2000-11-09 | 2002-05-16 | Kobelco Metal Powder Of America, Inc. | Mixture for powder metallurgy product and method for producing the same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1408131A1 (de) * | 2002-09-27 | 2004-04-14 | CARL DAN. PEDDINGHAUS GMBH & CO. KG | Stahlzusammensetzung und daraus hergestellte Gesenkschmiedeteile |
-
2006
- 2006-07-06 JP JP2006186927A patent/JP4902280B2/ja not_active Expired - Fee Related
-
2007
- 2007-07-04 WO PCT/JP2007/063377 patent/WO2008004585A1/ja active Application Filing
- 2007-07-04 CA CA2658051A patent/CA2658051C/en not_active Expired - Fee Related
- 2007-07-04 KR KR1020097002425A patent/KR101186445B1/ko active IP Right Grant
- 2007-07-04 SE SE0900121A patent/SE535027C2/sv not_active IP Right Cessation
- 2007-07-04 US US12/307,662 patent/US20090311122A1/en not_active Abandoned
- 2007-07-04 CN CN200780031476XA patent/CN101506401B/zh active Active
-
2013
- 2013-03-14 US US13/826,320 patent/US20130192414A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58133301A (ja) * | 1982-02-01 | 1983-08-09 | Toyota Motor Corp | 焼結鍛造品の製造方法 |
JPS61117203A (ja) * | 1984-11-09 | 1986-06-04 | Toyota Motor Corp | 焼結鍛造品の製造方法 |
WO2002038314A1 (en) * | 2000-11-09 | 2002-05-16 | Kobelco Metal Powder Of America, Inc. | Mixture for powder metallurgy product and method for producing the same |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010028470A2 (en) | 2008-09-12 | 2010-03-18 | Whirlpool S.A. | Metallurgical composition of particulate materials, self-lubricating sintered product and process for obtaining self-lubricating sintered products |
EP2331279B1 (en) * | 2008-09-12 | 2014-11-05 | Whirlpool S.A. | Metallurgical composition of particulate materials, self-lubricating sintered product and process for obtaining self-lubricating sintered products |
Also Published As
Publication number | Publication date |
---|---|
SE0900121L (sv) | 2009-02-03 |
CN101506401B (zh) | 2011-05-18 |
JP2008013818A (ja) | 2008-01-24 |
SE535027C2 (sv) | 2012-03-20 |
US20090311122A1 (en) | 2009-12-17 |
CA2658051C (en) | 2018-07-17 |
US20130192414A1 (en) | 2013-08-01 |
KR20090034373A (ko) | 2009-04-07 |
CA2658051A1 (en) | 2008-01-10 |
JP4902280B2 (ja) | 2012-03-21 |
KR101186445B1 (ko) | 2012-09-27 |
CN101506401A (zh) | 2009-08-12 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2008004585A1 (fr) | Élément obtenu par forgeage de poudre, mélange de poudre destiné au forgeage de poudre, procédé destiné à produire un élément par forgeage de poudre et tige de raccord pour séparation par rupture obtenue par ce procédé | |
KR101520208B1 (ko) | 기소강 및 그의 제조 방법, 및 기소강을 이용한 기계 구조 부품 | |
WO2013121930A1 (ja) | 熱間鍛造用圧延棒鋼および熱間鍛造素形材ならびにコモンレールおよびその製造方法 | |
JP3463651B2 (ja) | 軸受用鋼材 | |
US5725690A (en) | Long-life induction-hardened bearing steel | |
JP5182067B2 (ja) | 真空浸炭または真空浸炭窒化用の鋼材 | |
JP2007009321A (ja) | プラスチック成形金型用鋼 | |
JP4964063B2 (ja) | 冷間鍛造性および結晶粒粗大化防止特性に優れた肌焼鋼およびそれから得られる機械部品 | |
WO2019142947A1 (ja) | 浸炭軸受鋼部品、および浸炭軸受鋼部品用棒鋼 | |
JP4502929B2 (ja) | 転動疲労特性および結晶粒粗大化防止特性に優れた肌焼用鋼 | |
JP5167875B2 (ja) | 焼結コンロッドとその製造方法 | |
CN111788025A (zh) | 烧结气门导管及其制造方法 | |
JP6710484B2 (ja) | 粉末高速度工具鋼 | |
JP5556778B2 (ja) | 冷間鍛造用快削鋼 | |
WO2018212196A1 (ja) | 鋼及び部品 | |
JP4280923B2 (ja) | 浸炭部品又は浸炭窒化部品用の鋼材 | |
CN112204161B (zh) | 钢活塞用钢材 | |
JP6801717B2 (ja) | 冷間鍛造用鋼及びその製造方法 | |
KR20170121267A (ko) | 열간 압연 봉선재, 부품 및 열간 압연 봉선재의 제조 방법 | |
JP5583986B2 (ja) | 鍛造性に優れるオーステナイト系ステンレス快削鋼棒線 | |
JP5324979B2 (ja) | 疲労強度に優れた粉末鍛造品、粉末鍛造用混合粉末、および破断分割型コンロッド | |
JP2005307257A5 (ja) | ||
KR100309729B1 (ko) | 인성 및 강도가 우수한 냉간, 온간용 고속도공구강 및 그의 제조방법 | |
WO2022249349A1 (ja) | 鋼材、及び、その鋼材を素材とするクランクシャフト | |
JP2009263749A (ja) | 酸素富化雰囲気切削加工用の機械構造用鋼 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200780031476.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 07768135 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2658051 Country of ref document: CA |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1020097002425 Country of ref document: KR |
|
NENP | Non-entry into the national phase |
Ref country code: RU |
|
WWE | Wipo information: entry into national phase |
Ref document number: 12307662 Country of ref document: US |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 07768135 Country of ref document: EP Kind code of ref document: A1 |