Classifications

• • 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
  • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
• • 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
  • C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium

Definitions

• the stove consists of two parts of the carrier, and conventionally, the carrier was made into a bolt and fastened with bolts.
• the carrier was made into a bolt and fastened with bolts.
• this method it is necessary to finish the finish with a high degree of processing cost.
• Patent 3 discloses that, in addition to M and, by dispersing the C element, sufficient can be obtained even if the C content is less than 0.35.
• No. 6 discloses that a flat steel with a content of C 0 ⁇ 2 to 0 ⁇ 5 V 0 0 5 to 0 ⁇ 5 and a fly rate of less than 20 is applied to a broken contro.
• Patent 7 discloses that the diameter is larger than 5 and the number is 5 or more, and the parity rate is more suitable for breaking above 20.
• Patent 8 tZ shows a method for obtaining a random particle by controlling the chemical state while reducing the volume fraction of Pal to 40.
• Patent 9 discloses a method of suppressing the shape by adding a relatively large amount of P. It is disclosed that it is appropriate to set the parity rate to 50 above 0 and to set P to 0 05 to 0 when the carbon content is 0 ⁇ 4 to 0 ⁇ 5. It is.
• 2 is a fly-palite weave with a light rate of 40, and the lightness is 2500 in terms of the degree of victories, and the lightness of the light. Is disclosed as a suitable cracking material with a ratio of 0 ⁇ 80 ing.
• the problem to be solved is excellent in hot ductility, stable in light / pile weave when cooled by air or cooled, and
• the rate of the write / write rate is set to 60 or higher.
• the value defined by the following two formulas must be 3 ⁇ 0.
• the R value defined by the following formula (3 or 3) must be 3 5).
• C M C P V and S are the abundance () of A, and A is the abundance () as an impurity.
• S M S V and P are quantities of) and A, quantities as impure.
• the cooling weave is characterized by the fact that it is a frit paralite weave.
• Fig. 5 is a diagram showing the size of a conrot used in the experiment. a indicates the plane and b indicates the side .
• the second feature is that the light integration rate of parts made of Akira Steel is controlled to a very large value of 60 or higher. In steels with a high freight integration ratio, The shape of, is small and only the final occurrence is suppressed.
• the target of the experiment is that the component composition is C 0 ⁇ ⁇ 0 ⁇ 50 or less. ), S 0 to • 4 M 0 4 0 to 2 P 0 0 0 6 to 0 S 0 0 0 7 to 0 0 8 C 0 2 to 0 5 0 A 0 0 to 0 0 3 4 V 0 2 0 to 0 45 0-0 0 5 9 Pb 0-0 2 6 0 Ca 0-0 0 0 04 and 0 0 0 2 2-0 ⁇ 0 6 8 quasi steel experiments were conducted using hot It went with the matter.
• the diameter was 8 and the height was 2. After heating to 5 2 3, while cooling at the time of 0 s, apply 60 60 height at 2 3 during cooling, and And cooled to room temperature.
• the structure of the alcohol (it was corroded by the nital) was observed with an optical microscope at a magnification of 200 times, and the proportion of irregular shaped fly grains was measured.
• the frit grains observed as a frit / pile weave are white and polygonal, but if an irregular weave is produced, the same color but with a quantity of chemicals, Judged to be bainite.
• a fixed form basically indicates a shape with or changed to.
• the ratio of the bait grain to the total number of the flite and bainite grains is 3, and the structure is a freight / pile weave. If the bainitic grain is 3, there is almost no material.
• C 0 2 0 to 0 ⁇ 40 As a material for the above, C 0 2 0 to 0 ⁇ 40, below, from the 6 8 criteria used to obtain the above values. ), C 0 0 2 to 0 2 0 A 0 0 0 0 to 0 ⁇ 0 3 0 P 0 0 The 3 0 standard in the lower box was used. These materials were melted in a test furnace and made into ingots, and then hot worked into materials with a cross section of 25 m.
• this material was cut to 0 degree, turned to 50 3, and then cooled to room temperature by applying wind of 5 S wind speed.
• the Z 2 test is fixed to the bolt with the bolt so that the Z 2 test will not come off the split mold.
• the inside diameter was assumed to be. Specifically, after matching the fracture and reconnecting the bolts, the difference between the measured and determined initial state of the test was obtained, and the total difference between the vertical and horizontal directions was defined as the deformation. The smaller the is, the higher it is.
• the hardness was measured on the surface from the test surface, and the light volume fraction was measured using an optical microscope.
• the maximum amount of light is 75 degrees at 0 ⁇ 23 under the clear C amount.
• the component composition is C 0 to 0 ⁇ 50, the following) S 0 to 40 7 to 2 46 P 0 0 0 6 to 0 5 S 0 0 0 7 to 0 8 C 0 0 2 to 0 0 A 0 0 0 to 0
• the diameter was 0m and the length was 0, and a thermocouple was attached at the test head. This, It was attached to a current-carrying device equipped with a device, and heated at both ends while being cooled with copper water.
• the test is heated by electricity, cooled to 60, 0 S, constant temperature 4 7 3 3 7 3, and 2 7 3, held at 30 S, and pulled at 0 ⁇ 0 05 S Defeated.
• the glue value was adopted as a measure of the ductility. It can be judged that steel with a small value is prone to cracking continuously.
• the values of tensile values 4 7 3 3 7 3 and 2 7 3 are independent numbers, and the number of alloy elements is As a result, the average value of the number of elements that were determined to be prime in relation to the number of elements was calculated, and using these numbers, R defined by the following equation 3 or 3 was obtained.
• the higher the aperture value the better.
• the rawness of shatter is affected by the casting structure and conditions, but the relationship between the drawing value of various ductile steels and the degree of cracking and scratching was investigated. As a result, it has been found that if the aperture value is 35 or higher, the amount of continuous leakage and life can be reduced sufficiently. Therefore, the R value given by 3) or 3 is limited to 3 5. In addition, since it depends on the amount of element above the R value, it is not particularly determined.
• C is necessary on the order of 0 ⁇ 2 3 in order to ensure the speed of the parts and to obtain good quality.
• the light increases and decreases. Therefore, even if the tensile strength is increased by adjusting the alloy elements, the yield should not be improved so much, and will decrease, so the upper limit is limited to 0.35.
• ⁇ C. V forms a compound. Turn the light on. The range is 0 ⁇ 2 8 to 0 ⁇ 3 2.
• S is essential to promote the light state and increase the light rate. In addition, S stabilizes the light and reduces ductility. In order to reduce the light quality, 0 ⁇ 70 is required. However, if it exceeds 30, the hot ductility decreases. From the viewpoint of maintaining ductility, the lower limit is preferably 0 5. More preferably, it is 0 ⁇ 80 to • 0 5. M 0 7 6 ⁇
• M is a solidifying element and an element that promotes the bainitic state.
• the upper limit is set to 7 to prevent bainitic life.
• M is necessary to specify S as a chemical compound and increase hot ductility.
• the lower limit is limited to 0 ⁇ 76.
• 0 ⁇ 8 0 ⁇ ⁇ 0 0 is there.
• P is a light decimal and an init element.
• 0 ⁇ 040 is required.
• the upper limit is set to 0 ⁇ 0 80. From the standpoint of maintaining the ductility, it is preferable to have a value of 0 ⁇ 06 5. More preferably, it is 0 ⁇ 045 to 0 ⁇ 0 6 2.
• the lower limit is set to 0 ⁇ 040.
• the upper limit is set to 0 ⁇ .
• C like M, is a solidifying element and at the same time an element that promotes the bainitic state. Add 0 0 5 to secure sheath hardness. However, C is more effective in promoting the init state than M, so it is limited to 0 ⁇ 20 under the bait system. It is preferably 0 ⁇ 08 to 0 ⁇ 6.
• V is an element that forms a compound to form a light, improves yield and tension, and lowers ductility.
• the chemicals of V have the effect of promoting the light state, thus increasing the sex rights. As a result, as the deformation is reduced, the variation of the is also reduced.
• limit V to 2 7 .
• the upper limit is set to 0 ⁇ 45. It is preferably 0 ⁇ 30 to 0 ⁇ 4, more preferably 0 ⁇ 3 2 to 0 ⁇ 3 7.
• the lower limit is set to 0 ⁇ 0 0 5 0. If it is added excessively, the hot ductility is lowered and cracks or flaws are liable to occur, so the upper limit is set to 0 ⁇ 05. It is preferably 0 ⁇ 0 0 5 5 to 0 ⁇ 0 3 5.
• composition is a basic component, other elements may be selectively contained.
• selection elements are explained below.
• the bait state is suppressed by promoting the flight state.
• C a z to expect these results.
• .e need to be added on 0.0 0 0 5, and should be added on 0.0 0 5.
• the limit of e is 0 ⁇ 0 0 30 and the limit is 0 0 5 0.
• P is added for improvement.
• P since P has the effect of reducing the ductility, it is limited to 0 ⁇ 0 5 0. In order to obtain a sufficient improvement effect, a value of 0 ⁇ 0 is required.
• C and MO are elements that can be optionally contained. If it is a quantity, it does not have any special effect on the quality of the conrogate, but in any case, it increases the probability and promotes the state of init.
• C and C which are unavoidable, are preferably 0 ⁇ lower, and MO is preferably 0 ⁇ 0 lower.
• b is an element that has the same effect as that of V.
• the part of V can be replaced with b.
• b The chemicals are higher than the V chemicals and are easy to use as raw materials.
• the compass can be used for parts that are required at an accurate degree or parts that are repeatedly removed and installed for maintenance work.
• the subsequent ductility of the material was evaluated by a hot tensile test.
• the diameter was 0 and the length was 0, and a thermocouple was attached at the test stage.
• the forging hob was made by hot forming.
• the test was performed by opening a 50m 80m diameter 2m with a diameter of 50m and a direction perpendicular to the direction of the element before forging on the 50m diameter surface. And 0. Depth 0 at two opposite locations
• the wedge When dropped, the wedge is driven and pulled into two tests. Note that the periphery is fixed so that the test is not released from the split mold and is pressed against the test.
• the fly volume fraction was measured with an optical microscope, and the weaving was observed by the same method as described above to determine the absence of bainitic weaving.
• the tissue corroded with alcohol night-like was observed with an optical microscope at a magnification of 200 times, and the irregularly shaped particles with a white amount of a compound were counted as bait. .
• the ratio of bait grains to the total number of flies and bait grains was less than 3, and no bait was defined.
• Fig. 2 shows the values of hot tensile strength, the results of tests of the forged con- tainer at room temperature, and (in the XY direction) along with, and R. ⁇ 2 4 is. In both cases, there is no bainite weave, and the values on the fly 6 and the hot tensile test are 3 7 are good. Also, the room temperature test and 0 2 are on 8 65 Pa and 6 93 MPa, respectively, and the pull on 8 50 Pa and the 0 ⁇ 2 force on 6 50 Pa are shown. Realized.
• C 70 S 6 has a high C content, so the tensile strength S is 9 95 MPa high, but 0 ⁇ 2 6 2 2 MP low.
• o 2 9 3 0 3 3 8 and 3 9 are both low in R value and have a hot tensile test value of less than 3 5, making it difficult to produce a suitable material.
• 3 to 3 7 have a large R value, but a large amount of C a z and / or e is added, and the hot tensile test value is low. Top availability

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Mechanical Engineering (AREA)
• Metallurgy (AREA)
• Organic Chemistry (AREA)
• Heat Treatment Of Steel (AREA)
• Forging (AREA)
• Heat Treatment Of Articles (AREA)

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• 2009
  • 2009-07-23 WO PCT/JP2009/063535 patent/WO2010013763A1/ja active Application Filing
  • 2009-07-23 CN CN2009801011994A patent/CN101883874B/zh active Active
  • 2009-07-23 EP EP09803005.9A patent/EP2305851B1/en active Active
  • 2009-07-23 JP JP2010522745A patent/JP5340290B2/ja not_active Expired - Fee Related
  • 2009-07-27 TW TW098125198A patent/TWI396755B/zh not_active IP Right Cessation

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