CN107354393A - Alloy mold and manufacture method - Google Patents

Alloy mold and manufacture method Download PDF

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Publication number
CN107354393A
CN107354393A CN201710485552.XA CN201710485552A CN107354393A CN 107354393 A CN107354393 A CN 107354393A CN 201710485552 A CN201710485552 A CN 201710485552A CN 107354393 A CN107354393 A CN 107354393A
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CN
China
Prior art keywords
mould
alloy mold
base substrate
chromium
manufacture method
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.)
Pending
Application number
CN201710485552.XA
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Chinese (zh)
Inventor
徐�明
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.)
Suzhou Ai Kumahe Device Fabrication Co Ltd
Original Assignee
Suzhou Ai Kumahe Device Fabrication Co Ltd
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
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Application filed by Suzhou Ai Kumahe Device Fabrication Co Ltd filed Critical Suzhou Ai Kumahe Device Fabrication Co Ltd
Priority to CN201710485552.XA priority Critical patent/CN107354393A/en
Publication of CN107354393A publication Critical patent/CN107354393A/en
Pending legal-status Critical Current

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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • C22C38/02—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
    • C22C38/18—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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
    • C23C14/165—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon by cathodic sputtering
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/34—Sputtering

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Physical Vapour Deposition (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)

Abstract

The invention discloses a kind of alloy mold and manufacture method, wherein alloy mold includes the raw material of following weight percentage：C is 0.25-0.33%, P≤0.042%, Mn0.51-0.74%, S≤0.027%, Cr 1.42-1.53%, Cu≤0.8%, Mo 0.62-0.74%, Ti 0.4-0.6%, V is 0.55-0.75%, B≤0.01%, Si 0.85-0.93%, Ni 2.9-3.8%, N is 0.2-0.3%, remaining is Fe and inevitable impurity, the surface of the alloy mold has one layer of chromium coating, and the thickness of the chromium coating is 0.03-0.06mm.Present invention tool is wear-resistant and anti-oxidant, improves the quality that mould produces product, production cost is low；And antifatigue, corrosion-resistant, not easy to wear, deformation, service life length, integrated cost are low.

Description

Alloy mold and manufacture method
Technical field
The present invention relates to mould and its preparing technical field.
Background technology
At present, the part of many electronic products, automobile etc. is all produced by mould, and mould adds as machinery The important element in work field, due to its advantage in terms of cost is produced and processed, product, part processing are had become First choice.Mould, it is exactly the instrument for shaped article or part briefly.According to the difference of shaped article, by mould point For metal die and nonmetal mould, metal die is typically all to be formed by casting, then the metal die to having cast It is surface-treated to reach the requirement of its performance.
Due to mould surface and the various physics being formed between raw material and the response of chemical characteristic, usual mould molding Many problems occur in face and the contact surface being formed between raw material.As moulding material is easily sticked in mould in the case of a high temperature In forming surface, so higher to the quality requirement of molding surface.Typically use electronickelling in the prior art, but mould There is very high requirement to the even uniform performance of the nickel dam of electronickelling, hardness and fatigue resistance are not ideal, mould is easy to wear, Deformation, short life.
The content of the invention
The invention provides a kind of alloy mold, and tool is wear-resistant and anti-oxidant, improves the quality that mould produces product, Production cost is low；And antifatigue, corrosion-resistant, not easy to wear, deformation, service life length, integrated cost are low.
In order to solve the above technical problems, one aspect of the present invention is：A kind of alloy mold is provided, including with The raw material of lower weight percentage：
C be 0.25-0.33%, P≤0.042%, Mn 0.51-0.74%,
S≤0.027%, Cr 1.42-1.53%, Cu≤0.8%,
Mo is 0.62-0.74%, Ti 0.4-0.6%,
V be 0.55-0.75%, B≤0.01%,
Si is 0.85-0.93%, Ni 2.9-3.8%,
N is 0.2-0.3%, and remaining is Fe and inevitable impurity.
Further say, the surface of the alloy mold has one layer of chromium coating, and the thickness of the chromium coating is 0.03- 0.06mm。
Further say, the chromium coating is formed using vacuum splashing and plating.
Present invention also offers a kind of manufacture method of described alloy mold, carry out in accordance with the following steps：
Step 1: the material of above-mentioned each component is subjected to melting, smelting temperature 1340-1380 according to above-mentioned proportioning ℃；
Poured Step 2: the material after above-mentioned melting is sent into mould, placing temperature is 1260-1340 DEG C；
Step 3: by mould as cooling 16-20 hours in oil；
Step 4: forging the die blank poured, reference plane is rough milled after blank stress relief annealing；
Step 5: mould base substrate is carried out into Quenching Treatment again, hardening heat is 1005-1085 DEG C；
Step 6: the alloy mold base substrate after quenched processing is carried out to be incubated 3-5 hours, 150-180 DEG C is cooled to Come out of the stove；
Step 7: the forming surface of finish-milling mould base substrate；
Step 8: mould base substrate is refined using emery wheel, Surface Machining is smooth；
Step 9: the mould base substrate after step 8 is handled again carries out temper between 760-800 DEG C；
Further say, in addition to step 10 and step 11：
Step 10: the forming surface of the mould base substrate after tempered processing is subjected to sputter chromium；
Step 11: the mould after sputter is subjected to blasting treatment.
Further say, sputter chromium is carried out under vacuum, and temperature is 500-530 DEG C.
Further say, the sand employed in the blasting treatment is quartz sand, granularity 0.01mm-0.03mm.
Further say, in the step 10, the thickness for the layers of chrome that the sputter chromium is formed is 0.04-0.05mm.
The beneficial effects of the invention are as follows：
For the alloy mold of the present invention by above-mentioned material mixture ratio and manufacturing process, tool is wear-resistant and anti-oxidant, improves Mould produces the quality of product, and production cost is low；And antifatigue, corrosion-resistant, not easy to wear, deformation, service life length, Integrated cost is low；And be combined by rough milling with finish-milling and grinding, more accurate mould can be made, while pass through sputter Chromium processing, and coating is uniform, corrosion-resistant, wear resistance is good, and coating surface is smooth, is not likely to produce crackle, can adapt to alloy mould The requirement of tool, there are wide market prospects.
Above description of the invention is only the general introduction of technical solution of the present invention, in order to better understand the skill of the present invention Art means, and being practiced according to the content of specification, with presently preferred embodiments of the present invention and describe in detail below as after.
Embodiment
Illustrate the embodiment of the present invention below by way of particular specific embodiment, those skilled in the art can be by this Content disclosed in specification understands advantages of the present invention and effect easily.The present invention can also other different modes give Implement, i.e. without departing substantially under the scope of disclosed, different modification and change can be given.
Embodiment 1：A kind of alloy mold, include the raw material of following weight percentage：
C be 0.25%, P 0.028%, Mn 0.67%,
S≤0.024%, Cr 1.47%, Cu≤0.6%,
Mo is 0.65%, Ti 0.4%,
V be 0.56%, B≤0.08%,
Si is 0.87%, Ni 3.4%,
N is 0.26%, and remaining is Fe and inevitable impurity.
The surface of the alloy mold has one layer of chromium coating, and the thickness of the chromium coating is 0.03mm.
The chromium coating is formed using vacuum splashing and plating.
The manufacture method of described alloy mold, carry out in accordance with the following steps：
Step 1: the material of above-mentioned each component is subjected to melting, smelting temperature 1340-1380 according to above-mentioned proportioning ℃；
Poured Step 2: the material after above-mentioned melting is sent into mould, placing temperature is 1260-1340 DEG C；
Step 3: by mould as cooling 16-20 hours in oil；
Step 4: forging the die blank poured, reference plane is rough milled after blank stress relief annealing；
Step 5: mould base substrate is carried out into Quenching Treatment again, hardening heat is 1005-1085 DEG C；
Step 6: the alloy mold base substrate after quenched processing is carried out to be incubated 3-5 hours, 150-180 DEG C is cooled to Come out of the stove；
Step 7: the forming surface of finish-milling mould base substrate；
Step 8: mould base substrate is refined using emery wheel, Surface Machining is smooth；
Step 9: the mould base substrate after step 8 is handled again carries out temper between 760-800 DEG C；
Also include step 10 and step 11：
Step 10: the forming surface of the mould base substrate after tempered processing is subjected to sputter chromium；
Step 11: the mould after sputter is subjected to blasting treatment.
Sputter chromium is carried out under vacuum, and temperature is 500-530 DEG C.
Sand employed in the blasting treatment is quartz sand, granularity 0.01mm-0.03mm.
In the step 10, the thickness for the layers of chrome that the sputter chromium is formed is 0.04-0.05mm.
Embodiment 2：Similar to Example 1, difference is：
C be 0.33%, P 0.032%, Mn 0.74%,
S 0.021%, Cr 1.43%, Cu 0.5%,
Mo is 0.67%, Ti 0.4%,
V be 0.72%, B 0.06%,
Si is 0.93%, Ni 2.9%,
N is 0.3%, and remaining is Fe and inevitable impurity.
The surface of the alloy mold has one layer of chromium coating, and the thickness of the chromium coating is 0.045mm.
For the alloy mold of the present invention by above-mentioned material mixture ratio and manufacturing process, tool is wear-resistant and anti-oxidant, improves Mould produces the quality of product, and production cost is low；And antifatigue, corrosion-resistant, not easy to wear, deformation, service life length, Integrated cost is low；And be combined by rough milling with finish-milling and grinding, more accurate mould can be made, while pass through sputter Chromium processing, and coating is uniform, corrosion-resistant, wear resistance is good, and coating surface is smooth, is not likely to produce crackle, can adapt to alloy mould The requirement of tool, there are wide market prospects.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair The equivalent structure that bright description is made, or other related technical areas are directly or indirectly used in, similarly it is included in In the scope of patent protection of the present invention.

Claims (8)

  1. A kind of 1. alloy mold, it is characterised in that：Include the raw material of following weight percentage：
    C be 0.25-0.33%, P≤0.042%, Mn0.51-0.74%,
    S≤0.027%, Cr 1.42-1.53%, Cu≤0.8%,
    Mo is 0.62-0.74%, Ti 0.4-0.6%,
    V be 0.55-0.75%, B≤0.01%,
    Si is 0.85-0.93%, Ni 2.9-3.8%,
    N is 0.2-0.3%, and remaining is Fe and inevitable impurity.
  2. 2. alloy mold according to claim 1, it is characterised in that：The surface of the alloy mold has one layer of chromium plating Layer, the thickness of the chromium coating is 0.03-0.06mm.
  3. 3. alloy mold according to claim 2, it is characterised in that：The chromium coating is formed using vacuum splashing and plating.
  4. A kind of 4. manufacture method of alloy mold according to right 1, it is characterised in that：Carry out in accordance with the following steps：
    Step 1: the material of above-mentioned each component is carried out into melting according to above-mentioned proportioning, smelting temperature is 1340-1380 DEG C；
    Poured Step 2: the material after above-mentioned melting is sent into mould, placing temperature is 1260-1340 DEG C；
    Step 3: by mould as cooling 16-20 hours in oil；
    Step 4: forging the die blank poured, reference plane is rough milled after blank stress relief annealing；
    Step 5: mould base substrate is carried out into Quenching Treatment again, hardening heat is 1005-1085 DEG C；
    Step 6: the alloy mold base substrate after quenched processing is carried out to be incubated 3-5 hours, it is cooled to 150-180 DEG C and comes out of the stove；
    Step 7: the forming surface of finish-milling mould base substrate；
    Step 8: mould base substrate is refined using emery wheel, Surface Machining is smooth；
    Step 9: the mould base substrate after step 8 is handled again carries out temper between 760-800 DEG C.
  5. 5. manufacture method according to claim 4, it is characterised in that：Also include step 10 and step 11：
    Step 10: the forming surface of the mould base substrate after tempered processing is subjected to sputter chromium；
    Step 11: the mould after sputter is subjected to blasting treatment.
  6. 6. manufacture method according to claim 5, it is characterised in that：Sputter chromium is carried out under vacuum, temperature For 500-530 DEG C.
  7. 7. manufacture method according to claim 5, it is characterised in that：Sand employed in the blasting treatment is quartz Sand, granularity 0.01mm-0.03mm.
  8. 8. alloy mold according to claim 5, it is characterised in that：In the step 10, the chromium of the sputter chromium formation The thickness of layer is 0.04-0.05mm.
CN201710485552.XA 2017-06-23 2017-06-23 Alloy mold and manufacture method Pending CN107354393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710485552.XA CN107354393A (en) 2017-06-23 2017-06-23 Alloy mold and manufacture method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710485552.XA CN107354393A (en) 2017-06-23 2017-06-23 Alloy mold and manufacture method

Publications (1)

Publication Number Publication Date
CN107354393A true CN107354393A (en) 2017-11-17

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Country Status (1)

Country Link
CN (1) CN107354393A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110172671A (en) * 2019-06-18 2019-08-27 南通大学 A kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation method
CN110497153A (en) * 2019-08-29 2019-11-26 天长市兴宇铸造有限公司 A kind of manufacturing method for the spring block that intensity is high

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002194586A (en) * 2000-12-20 2002-07-10 Sumitomo Metal Ind Ltd Plated film and electromagnetic shielding material
CN1676653A (en) * 2005-04-18 2005-10-05 宝钢集团上海五钢有限公司 Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method
JP2006052465A (en) * 2004-07-06 2006-02-23 Sumitomo Metal Ind Ltd Production method for high-tensile cold-rolled steel sheet
CN101024870A (en) * 2006-02-24 2007-08-29 南阳二机石油装备(集团)有限公司 Low-temperature high-strength, high-toughness steel and preparing method therefor
TW200821414A (en) * 2006-11-15 2008-05-16 Ching Ho Treatment method of high luster magnesium alloy surface
CN101892429A (en) * 2010-06-29 2010-11-24 上海大学 High-toughness cold-work mould steel and preparation method thereof
CN104004966A (en) * 2014-05-20 2014-08-27 滁州迪蒙德模具制造有限公司 Manufacturing method of stamping die

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002194586A (en) * 2000-12-20 2002-07-10 Sumitomo Metal Ind Ltd Plated film and electromagnetic shielding material
JP2006052465A (en) * 2004-07-06 2006-02-23 Sumitomo Metal Ind Ltd Production method for high-tensile cold-rolled steel sheet
CN1676653A (en) * 2005-04-18 2005-10-05 宝钢集团上海五钢有限公司 Anticorrosion, wear-resistant plastic die steel 4Cr16Mo and its mirror large-die-block preparing and producing method
CN101024870A (en) * 2006-02-24 2007-08-29 南阳二机石油装备(集团)有限公司 Low-temperature high-strength, high-toughness steel and preparing method therefor
TW200821414A (en) * 2006-11-15 2008-05-16 Ching Ho Treatment method of high luster magnesium alloy surface
CN101892429A (en) * 2010-06-29 2010-11-24 上海大学 High-toughness cold-work mould steel and preparation method thereof
CN104004966A (en) * 2014-05-20 2014-08-27 滁州迪蒙德模具制造有限公司 Manufacturing method of stamping die

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110172671A (en) * 2019-06-18 2019-08-27 南通大学 A kind of aluminum or aluminum alloy casting mould cracking resistance protective film and preparation method
CN110497153A (en) * 2019-08-29 2019-11-26 天长市兴宇铸造有限公司 A kind of manufacturing method for the spring block that intensity is high

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Application publication date: 20171117

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