CN109182699A - A kind of processing technology of die steel - Google Patents

A kind of processing technology of die steel Download PDF

Info

Publication number
CN109182699A
CN109182699A CN201811162611.0A CN201811162611A CN109182699A CN 109182699 A CN109182699 A CN 109182699A CN 201811162611 A CN201811162611 A CN 201811162611A CN 109182699 A CN109182699 A CN 109182699A
Authority
CN
China
Prior art keywords
temperature
60min
cooled
time
preheating
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
CN201811162611.0A
Other languages
Chinese (zh)
Inventor
唐的兵
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.)
Guangdong Rundeli Technology Co.,Ltd.
Original Assignee
Zhongshan Dong T Die And Steel Products 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
Publication date
Application filed by Zhongshan Dong T Die And Steel Products Co Ltd filed Critical Zhongshan Dong T Die And Steel Products Co Ltd
Priority to CN201811162611.0A priority Critical patent/CN109182699A/en
Publication of CN109182699A publication Critical patent/CN109182699A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
    • 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
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/32—Soft annealing, e.g. spheroidising
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/005—Heat treatment of ferrous alloys containing Mn
    • 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
    • C21D6/008—Heat treatment of ferrous alloys containing Si
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum

Landscapes

  • 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)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a kind of processing technology of die steel, composite material is added in smelting process, and composite material by mass percentage, contains following components: C 0~0.07%；Mn 0~1.00%；Ni 4.00~6.00%；Cr 14.00~16.00%；Mo 0~0.50%；P 0~0.03%；S 0~0.005%；Si 0~1.00%；Cu 2.50~4.50%；Nb+Ta 0.15~0.45%, surplus are inevitable impurity.The processing technology of die steel of the invention ensure that steel plate hardness reaches high requirement；Have the advantages that intensity is high, hardness is high and superior performance, and there is very strong corrosion resistance and fatigue resistance, improves service life.

Description

A kind of processing technology of die steel
Technical field
The present invention relates to a kind of processing technologys of die steel.
Background technique
Mould steel is the steel grade for manufacturing the molds such as cold-punching mould, hot-forging die, compression mod.Mold is machine-building, wireless The main machining tool of part is manufactured in the industrial departments such as electric instrument, motor, electric appliance.The quality of mold directly affects pressure and adds The quality of work technique, the precision yield of product and production cost, and the quality of mold and service life are in addition to leaning on reasonable structure Outside design and machining accuracy, mainly influenced by mold materials and heat treatment.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the defects of the prior art, provide a kind of processing work of die steel Skill.
In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions:
A kind of processing technology of die steel, the following steps are included:
(1) technique is forged: 560 DEG C~650 DEG C of preheating temperature, 1200 DEG C~1350 DEG C of heating temperature, initial forging temperature 1350 DEG C~1210 DEG C, 670 DEG C~830 DEG C of final forging temperature, slow cooling；
(2) it annealing process: heats and is warming up to 860 DEG C with the speed of≤90 DEG C/h, with 25-30 DEG C/h speed to furnace Cold 750 DEG C, then furnace it is cold with 10-15 DEG C/h speed cold 600 DEG C to furnace, then come out of the stove air-cooled；
(3) converter smelting: entering furnace molten iron temperature >=1300 DEG C, and composite material is added in smelting process；
(4) quenched: 600-600 DEG C of preheating for the first time keeps the temperature 45-60min；Second of 850-850 DEG C of preheating, keeps the temperature 45- 60min, soaking time press 1.5min/mm；1115 DEG C are heated to, oil of then quenching；It is 780 DEG C of tempering temperature, air-cooled after tempering；
(5) half smart cars；
(6) be heat-treated: vacuum hardening, for the first time 600~600 DEG C of preheating keep the temperature 45-60min, preheat for the second time: 840~ 860 DEG C, 45-60min is kept the temperature, soaking time is calculated by 1.5min/mm；980 DEG C of hardening heat, oily cold, medium temperature 15~30 ℃；It is then air-cooled to be cooled to oil temperature；
(7) it finishes；
(8) polish: roughness is less than 0.6um；(9) destressing is tempered: 210-150 DEG C of tempering temperature, time 2-2.5h.
Composite material described in step (3) by mass percentage, contains following components:
C 0~0.07%；Mn 0~1.00%；Ni 4.00~6.00%；Cr 14.00~16.00%；Mo 0~ 0.50%；P 0~0.03%；S 0~0.005%；Si 0~1.00%；Cu 2.50~4.50%；Nb+Ta 0.15~ 0.45%, surplus is inevitable impurity.
Further, the composite material by mass percentage, contains following components:
C 0~0.03%；Mn 0.80~1.00%；Ni 5.50%；Cr 16.00%；Mo 0.20%~0.50%；P 0~0.03%；S 0~0.002%；Si 0.05~0.80%；Cu 3.50%；Nb+Ta 0.35%, surplus are inevitable Impurity.
The processing technology of die steel of the invention ensure that steel plate hardness reaches high requirement；The high, hardness with intensity The advantages of high and superior performance, and there is very strong corrosion resistance and fatigue resistance, improve service life.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described, it should be understood that preferred embodiment described herein is only used In the description and interpretation present invention, it is not intended to limit the present invention.
Embodiment 1
A kind of processing technology of die steel, the following steps are included:
(1) technique is forged: 560 DEG C~650 DEG C of preheating temperature, 1200 DEG C~1350 DEG C of heating temperature, initial forging temperature 1350 DEG C~1210 DEG C, 670 DEG C~830 DEG C of final forging temperature, slow cooling；
(2) it annealing process: heats and is warming up to 860 DEG C with the speed of≤90 DEG C/h, with 25-30 DEG C/h speed to furnace Cold 750 DEG C, then furnace it is cold with 10-15 DEG C/h speed cold 600 DEG C to furnace, then come out of the stove air-cooled；
(3) converter smelting: entering furnace molten iron temperature >=1300 DEG C, and composite material is added in smelting process；
(4) quenched: 600-600 DEG C of preheating for the first time keeps the temperature 45-60min；Second of 850-850 DEG C of preheating, keeps the temperature 45- 60min, soaking time press 1.5min/mm；1115 DEG C are heated to, oil of then quenching；It is 780 DEG C of tempering temperature, air-cooled after tempering；
(5) half smart cars；
(6) be heat-treated: vacuum hardening, for the first time 600~600 DEG C of preheating keep the temperature 45-60min, preheat for the second time: 840~ 860 DEG C, 45-60min is kept the temperature, soaking time is calculated by 1.5min/mm；980 DEG C of hardening heat, oily cold, medium temperature 15~30 ℃；It is then air-cooled to be cooled to oil temperature；
(7) it finishes；
(8) polish: roughness is less than 0.6um；(9) destressing is tempered: 210-150 DEG C of tempering temperature, time 2-2.5h；
Composite material described in step (3) by mass percentage, contains following components:
C 0~0.07%；Mn 0~1.00%；Ni 4.00~6.00%；Cr 14.00~16.00%；Mo 0~ 0.50%；P 0~0.03%；S 0~0.005%；Si 0~1.00%；Cu 2.50~4.50%；Nb+Ta 0.15~ 0.45%, surplus is inevitable impurity.
Embodiment 2
A kind of processing technology of die steel, the following steps are included:
(1) technique is forged: 560 DEG C~650 DEG C of preheating temperature, 1200 DEG C~1350 DEG C of heating temperature, initial forging temperature 1350 DEG C~1210 DEG C, 670 DEG C~830 DEG C of final forging temperature, slow cooling；
(2) it annealing process: heats and is warming up to 860 DEG C with the speed of≤90 DEG C/h, with 25-30 DEG C/h speed to furnace Cold 750 DEG C, then furnace it is cold with 10-15 DEG C/h speed cold 600 DEG C to furnace, then come out of the stove air-cooled；
(3) converter smelting: entering furnace molten iron temperature >=1300 DEG C, and composite material is added in smelting process；
(4) quenched: 600-600 DEG C of preheating for the first time keeps the temperature 45-60min；Second of 850-850 DEG C of preheating, keeps the temperature 45- 60min, soaking time press 1.5min/mm；1115 DEG C are heated to, oil of then quenching；It is 780 DEG C of tempering temperature, air-cooled after tempering；
(5) half smart cars；
(6) be heat-treated: vacuum hardening, for the first time 600~600 DEG C of preheating keep the temperature 45-60min, preheat for the second time: 840~ 860 DEG C, 45-60min is kept the temperature, soaking time is calculated by 1.5min/mm；980 DEG C of hardening heat, oily cold, medium temperature 15~30 ℃；It is then air-cooled to be cooled to oil temperature；
(7) it finishes；
(8) polish: roughness is less than 0.6um；(9) destressing is tempered: 210-150 DEG C of tempering temperature, time 2-2.5h；
Step (3) described composite material by mass percentage, contains following components:
C 0~0.03%；Mn 0.80~1.00%；Ni 5.50%；Cr 16.00%；Mo 0.20%~0.50%；P 0~0.03%；S 0~0.002%；Si 0.05~0.80%；Cu 3.50%；Nb+Ta 0.35%, surplus are inevitable Impurity.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (2)

1. a kind of processing technology of die steel, which comprises the following steps:
(1) technique is forged: 560 DEG C~650 DEG C of preheating temperature, 1200 DEG C~1350 DEG C of heating temperature, 1350 DEG C of initial forging temperature~ 1210 DEG C, 670 DEG C~830 DEG C of final forging temperature, slow cooling；
(2) annealing process: heating and be warming up to 860 DEG C with the speed of≤90 DEG C/h, cold to furnace with 25-30 DEG C/h speed 750 DEG C, then furnace it is cold with 10-15 DEG C/h speed cold 600 DEG C to furnace, then come out of the stove air-cooled；
(3) converter smelting: entering furnace molten iron temperature >=1300 DEG C, and composite material is added in smelting process；
(4) quenched: 600-600 DEG C of preheating for the first time keeps the temperature 45-60min；Second of 850-850 DEG C of preheating, keeps the temperature 45- 60min, soaking time press 1.5min/mm；1115 DEG C are heated to, oil of then quenching；It is 780 DEG C of tempering temperature, air-cooled after tempering；
(5) half smart cars；
(6) be heat-treated: vacuum hardening, for the first time 600~600 DEG C of preheating keep the temperature 45-60min, preheat for the second time: 840~860 DEG C, 45-60min is kept the temperature, soaking time is calculated by 1.5min/mm；980 DEG C of hardening heat, oil is cold, and 15~30 DEG C of medium temperature； It is then air-cooled to be cooled to oil temperature；
(7) it finishes；
(8) polish: roughness is less than 0.6um；(9) destressing is tempered: 210-150 DEG C of tempering temperature, time 2-2.5h.
Composite material described in step (3) by mass percentage, contains following components:
C 0~0.07%；Mn 0~1.00%；Ni 4.00~6.00%；Cr 14.00~16.00%；Mo 0~0.50%；P 0~0.03%；S 0~0.005%；Si 0~1.00%；Cu 2.50~4.50%；Nb+Ta 0.15~0.45%, surplus are Inevitable impurity.
2. a kind of processing technology of die steel as described in claim 1, which is characterized in that the composite material presses quality hundred Divide than meter, contain following components:
C 0~0.03%；Mn 0.80~1.00%；Ni 5.50%；Cr 16.00%；Mo 0.20%~0.50%；P 0~ 0.03%；S 0~0.002%；Si 0.05~0.80%；Cu 3.50%；Nb+Ta 0.35%, surplus are inevitably miscellaneous Matter.
CN201811162611.0A 2018-09-30 2018-09-30 A kind of processing technology of die steel Pending CN109182699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811162611.0A CN109182699A (en) 2018-09-30 2018-09-30 A kind of processing technology of die steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811162611.0A CN109182699A (en) 2018-09-30 2018-09-30 A kind of processing technology of die steel

Publications (1)

Publication Number Publication Date
CN109182699A true CN109182699A (en) 2019-01-11

Family

ID=64946955

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811162611.0A Pending CN109182699A (en) 2018-09-30 2018-09-30 A kind of processing technology of die steel

Country Status (1)

Country Link
CN (1) CN109182699A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109759530A (en) * 2019-01-22 2019-05-17 宋鑫 A kind of production technology of the pump head body for oil-gas mining
CN110270799A (en) * 2019-07-02 2019-09-24 东莞盛翔精密金属有限公司 Laser detection jig plate manufacturing process
CN110724806A (en) * 2019-10-17 2020-01-24 江苏福旺重工科技有限公司 Destressing processing technology for reinforcing plate processing
CN111471940A (en) * 2020-04-29 2020-07-31 钢铁研究总院 High-strength stainless steel rotor and preparation method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105986074A (en) * 2015-01-30 2016-10-05 重庆沁煌机械制造有限公司 Die steel processing technology
CN105986084A (en) * 2015-01-30 2016-10-05 重庆君卓机械有限公司 Heat treatment technology of 9CrWMn die steel
CN107557688A (en) * 2017-09-15 2018-01-09 张家港市广大机械锻造有限公司 A kind of high toughness cold working die steel
CN107866660A (en) * 2016-09-24 2018-04-03 重庆向阳仪器有限公司 A kind of die steel processing technology
CN107955923A (en) * 2016-10-16 2018-04-24 重庆华厦新力新能源汽车有限公司 A kind of mold materials and preparation method thereof
CN107964578A (en) * 2016-10-19 2018-04-27 重庆华厦新力新能源汽车有限公司 A kind of automobile die steel processing technology

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105986074A (en) * 2015-01-30 2016-10-05 重庆沁煌机械制造有限公司 Die steel processing technology
CN105986084A (en) * 2015-01-30 2016-10-05 重庆君卓机械有限公司 Heat treatment technology of 9CrWMn die steel
CN107866660A (en) * 2016-09-24 2018-04-03 重庆向阳仪器有限公司 A kind of die steel processing technology
CN107955923A (en) * 2016-10-16 2018-04-24 重庆华厦新力新能源汽车有限公司 A kind of mold materials and preparation method thereof
CN107964578A (en) * 2016-10-19 2018-04-27 重庆华厦新力新能源汽车有限公司 A kind of automobile die steel processing technology
CN107557688A (en) * 2017-09-15 2018-01-09 张家港市广大机械锻造有限公司 A kind of high toughness cold working die steel

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109759530A (en) * 2019-01-22 2019-05-17 宋鑫 A kind of production technology of the pump head body for oil-gas mining
CN110270799A (en) * 2019-07-02 2019-09-24 东莞盛翔精密金属有限公司 Laser detection jig plate manufacturing process
CN110724806A (en) * 2019-10-17 2020-01-24 江苏福旺重工科技有限公司 Destressing processing technology for reinforcing plate processing
CN111471940A (en) * 2020-04-29 2020-07-31 钢铁研究总院 High-strength stainless steel rotor and preparation method thereof
CN111471940B (en) * 2020-04-29 2021-09-10 钢铁研究总院 High-strength stainless steel rotor and preparation method thereof

Similar Documents

Publication Publication Date Title
CN109182699A (en) A kind of processing technology of die steel
CN102912236B (en) High-performance and abrasion-resistant hot work die steel and technology for manufacturing same
KR100961022B1 (en) Method for producing hot-formed steel product
CN104532154A (en) High-hardness high-polishing pre-hardening plastic die steel and manufacture technology thereof
CN101392353A (en) High manganese and low chromium type high strength and toughness hot-work die steel and preparation method thereof
CN102974742B (en) Processing method of movable fork
CN101280394A (en) High-silicon low-carbon high-heat resistance hot work die steel
CN108774712A (en) Superelevation thermal conductivity hot stamping die steel and its manufacturing method
JP5226083B2 (en) High alloy cold die steel
CN103911556A (en) Hot work die steel material and preparation method thereof
CN113122684B (en) Processing method for improving SDH13 performance of die steel
CN102936692B (en) Cold punching die mold steel processing method
JP2015188927A (en) Production method of forged member
CN102936703A (en) Cold heading die mold steel processing method
CN107866660A (en) A kind of die steel processing technology
CN105177430A (en) Alloy tool steel and production method thereof
CN102953013A (en) Preparation technology of die steel for hot-forging die and die-casting die
CN107442721A (en) A kind of warm and hot forging technique of mould
CN107794348A (en) A kind of Technology for Heating Processing of raising Cr12MoV steel combination properties
TW202000428A (en) Plastic injection mold tooling and a method of manufacture thereof
CN103846633A (en) Method of forging idler shaft for gearbox
CN105695700A (en) Heat treatment process for die steel
CN102989982B (en) Forging method of driving shaft for gearbox
CN104120342A (en) Roll and preparation method thereof
CN103789688A (en) Heat treatment method of cold work die steel used for blanking die

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20200615

Address after: 528400 Guangdong city of Zhongshan Province three township village of great Tangxia Street No. 2 first floor of building A three

Applicant after: Guangdong Rundeli Technology Co.,Ltd.

Address before: 528400 One of the 2nd and 1st floors of No. 2 Factory Building of Tangxia Street, Dabucun, Three Townships, Zhongshan City, Guangdong Province

Applicant before: ZHONGSHAN DONGTE MOULD STEEL PRODUCTS Co.,Ltd.

RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190111