CN114921626A - Homogenization production method for improving impact energy of H13 die steel - Google Patents
Homogenization production method for improving impact energy of H13 die steel Download PDFInfo
- Publication number
- CN114921626A CN114921626A CN202210614196.8A CN202210614196A CN114921626A CN 114921626 A CN114921626 A CN 114921626A CN 202210614196 A CN202210614196 A CN 202210614196A CN 114921626 A CN114921626 A CN 114921626A
- Authority
- CN
- China
- Prior art keywords
- heating
- die steel
- impact energy
- diameter
- heating rate
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 41
- 239000010959 steel Substances 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000000265 homogenisation Methods 0.000 title abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 68
- 238000000034 method Methods 0.000 claims abstract description 41
- 238000004321 preservation Methods 0.000 claims abstract description 20
- 238000009792 diffusion process Methods 0.000 claims abstract description 16
- 238000002791 soaking Methods 0.000 claims abstract description 6
- 230000005496 eutectics Effects 0.000 abstract description 21
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000005204 segregation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 150000001247 metal acetylides Chemical group 0.000 description 4
- 238000005242 forging Methods 0.000 description 3
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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
- C21D6/00—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
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/70—Furnaces for ingots, i.e. soaking pits
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to a homogenization production method for improving impact energy of H13 die steel, which comprises the following steps: (1) high-temperature diffusion of electroslag ingots: placing the electroslag ingot into a heating furnace, rapidly heating to 300-400 ℃, then heating to 600-650 ℃ at a heating rate of 50-60 ℃/h, preserving heat for 2-4 h, then heating to 800-850 ℃ at a heating rate of 70-80 ℃/h, preserving heat for 2-4 h, then heating to 1280 ℃ at a heating rate of 60-100 ℃/h, preserving heat for 8-12 h, then soaking for 4h when the temperature is reduced to 1270 ℃, and then performing a three-upsetting and three-drawing process; (2) high-temperature diffusion of the process blank: heating the process blank subjected to the three-heading and three-drawing to 1260 ℃ at the heating rate of 80-100 ℃/h, and carrying out heat preservation for 14-20 h; according to the method, the electroslag ingot and the process blank in the H13 die steel forming process are subjected to two high-temperature homogenization processes, the eutectic carbide in the steel is fully dissolved, the impact energy of the prepared H13 die steel reaches more than 300J, the service life of the steel is greatly prolonged, and the method is suitable for wide popularization and application.
Description
Technical Field
The invention relates to the technical field of metal material manufacturing, in particular to a homogenization production method for improving the impact energy of H13 die steel.
Background
The H13 die steel is a common hot work die steel, has high heat resistance, high thermal fatigue resistance, high wear resistance, good isotropy and the like, is often used as a die casting die and is in a high-temperature and high-pressure environment for a long time. The impact energy toughness of the H13 die steel reflects the comprehensive performance of the hot work die steel, and directly influences the service life of a die made of the H13 die steel. The impact energy of H13 die steel produced by general enterprises at present is very unstable, the average level is about 260J, the highest value is only 280J, and even a part of H13 die steel has the impact energy below 200J.
Sampling an H13 die steel module with the impact energy lower than 200J, scanning a fracture by using an electron microscope, finding that a large amount of eutectic carbide exists in the fracture, analyzing the eutectic carbide, wherein the eutectic carbide mainly contains V, Fe and other elements, the content of V is 53%, the eutectic carbide is mainly vanadium carbide, and a small amount of Cr and other elements exist. High power tissue detection is carried out on a sample under 500X, secondary carbides are uniformly distributed, no secondary carbide network is found, but a large amount of eutectic carbides exist, the size is between 5 and 15 micrometers, the eutectic carbides are in a chain shape along the deformation direction, the color is white under a microscope, the color is black under a dark field, and an obvious limit exists between the eutectic carbides and a matrix.
The main reasons for the low lateral impact are: (1) a large amount of eutectic carbide exists in steel, particularly vanadium carbide exists, the eutectic carbide is hard and brittle and is difficult to deform, the continuity of a matrix is damaged, and stress concentration is easily generated at the eutectic carbide under the action of external force to form a crack source. (2) There was band segregation with distinct black and white bands.
Disclosure of Invention
The invention aims to provide a homogenizing production method for improving the impact energy of H13 die steel, which aims at solving the problems that the service life of a die is influenced by low impact energy when the die made of H13 die steel is used and analyzing the reason of low transverse impact energy of H13 die steel, improves the distribution of eutectic carbide in H13 die steel and improves the strip segregation.
The invention discloses a homogenizing production method for improving impact energy of H13 die steel, which comprises the following steps:
(1) high-temperature diffusion of electroslag ingots:
placing an electroslag ingot into a heating furnace, quickly heating to 300-400 ℃, then heating to 600-650 ℃ at a heating rate of 50-60 ℃/h, preserving heat for 2-4 h, then heating to 800-850 ℃ at a heating rate of 70-80 ℃/h, preserving heat for 2-4 h, then heating to 1280 ℃ at a heating rate of 60-100 ℃/h, and preserving heat, wherein the heat preservation time is determined by the diameter D of the electroslag ingot, specifically, when the diameter D of the electroslag ingot is less than 650mm, the heat preservation time is 8h, when the diameter D of the electroslag ingot is not more than 650mm, the heat preservation time is 10h, when the diameter D of the electroslag ingot is more than 780mm, the heat preservation time is 12h, then, when the temperature is decreased to 1270 ℃, soaking for 4h, and then carrying out a three-heading three-drawing process;
(2) high-temperature diffusion of process blank:
and (3) heating the process blank subjected to three heading and three drawing to 1260 ℃ at the heating rate of 80-100 ℃/h, and preserving heat, wherein the heat preservation time is determined by the diameter d of the primary electroslag ingot, and specifically comprises the following steps: when the diameter d of the process blank is less than 650mm, the heat preservation time is 14h, when the diameter d of the process blank is not less than 650mm and not more than 780mm, the heat preservation time is 16h, and when the diameter d of the process blank is more than 780mm, the heat preservation time is 20 h.
The process principle of the method is as follows:
the conventional heating temperature of H13 die steel is 1240 ℃, but through the research of the inventor of the application, the heating temperature of 1240 ℃ is not enough to completely dissolve eutectic carbide in steel, so that eutectic carbide aggregation or banded segregation easily exists in the steel, while the heating temperature of the electroslag ingot is increased to 1280 ℃, the heating temperature is increased to the greatest extent under the condition of ensuring that the electroslag ingot is not overheated, and the proper heat preservation time is controlled, so that the eutectic carbide can be fully dissolved, and the steel can not be scrapped due to the overlong heating and heat preservation time; the electroslag ingot is soaked for 4 hours at 1270 ℃ after being subjected to heat preservation at 1280 ℃, so that the effect of improving the temperature difference between the inside and the outside of the electroslag ingot can be achieved; after the electroslag ingot treated at high temperature is subjected to a three-heading and three-drawing process, eutectic carbide is fully crushed, the steel is heated to 1260 ℃ again, and the temperature is kept for a certain time to achieve the effects of continuously dissolving and diffusing the eutectic carbide, so that large eutectic carbide blocks in the finished product H13 die steel prepared by twice homogenization heating processes are basically eliminated, the banded segregation reaches more than SB (SEP 1614-91 standard), the impact energy of the finished product H13 die steel reaches 300J, and the use effect is stable.
Compared with the prior art, the invention has the following beneficial effects:
(1) the electroslag ingot is subjected to a high-temperature diffusion process, the heating temperature of the electroslag ingot is increased, the high-temperature diffusion effect is improved, and the heating temperature is increased as much as possible under the condition of ensuring no overheating, so that the eutectic carbide in steel is fully dissolved, and the impact energy performance of steel is improved;
(2) the high-temperature diffusion process is carried out on the process blank of three-heading and three-drawing, the crushed eutectic carbide is fully dissolved again, and meanwhile, the process blank is small in size, so that the high-temperature diffusion is facilitated, and the eutectic carbide and the banded segregation in the formed steel are greatly improved;
(3) by adopting the homogenization process, the impact energy of the prepared H13 die steel can reach more than 300J.
Detailed Description
In order to better explain the technical solution of the present invention, the technical solution of the present invention is further described below with reference to specific examples, which are only exemplary to illustrate the technical solution of the present invention and do not limit the present invention in any way.
Example 1
This example uses a 6t electroslag ingot with a diameter of 780/740mm and a forging size of 250 x 800 mm.
The homogenized production method of the impact energy of the H13 die steel comprises the following steps:
(1) high-temperature diffusion of electroslag ingots:
placing the electroslag ingot into a heating furnace, rapidly heating to 400 ℃, then heating to 600 ℃ at a heating rate of 55 ℃/h, preserving heat for 3h, then heating to 850 ℃ at a heating rate of 75 ℃/h, preserving heat for 3h, then heating to 1280 ℃ at a heating rate of 80 ℃/h, preserving heat for 10h, then soaking for 4h when the temperature is reduced to 1270 ℃, and then carrying out a three-upsetting-three-drawing process;
(2) high-temperature diffusion of the process blank:
and (3) heating the process blank subjected to the three-heading and three-drawing to 1260 ℃ at the heating rate of 90 ℃/h, and preserving heat for 16h to finish the subsequent process.
The product of the present example is H13 die steel with 315J impact energy after homogenization.
Example 2
This example uses a 3.7t electroslag ingot with a diameter of 650/600mm and a forging size of 180 x 700 mm.
The homogenized production method of the impact energy of the H13 die steel comprises the following steps:
(1) high-temperature diffusion of electroslag ingots:
placing the electroslag ingot into a heating furnace, quickly heating to 300 ℃, then heating to 650 ℃ at a heating rate of 50 ℃/h, preserving heat for 2h, then heating to 800 ℃ at a heating rate of 70 ℃/h, preserving heat for 2h, then heating to 1280 ℃ at a heating rate of 60 ℃/h, preserving heat for 8h, then soaking for 4h when the temperature is reduced to 1270 ℃, and then carrying out a three-upsetting and three-drawing process;
(2) high-temperature diffusion of the process blank:
and (3) heating the process blank subjected to the three-heading and three-drawing to 1260 ℃ at the heating rate of 100 ℃/h, and preserving heat for 14h to finish the subsequent process.
In this example, the product H13 die steel made by the homogenization process has a work of impact 332J.
Example 3
This example uses an 8t electroslag ingot with a diameter of 820/780mm and a forging size of 320 x 850 mm.
The method for homogenizing the impact energy of the H13 die steel comprises the following steps:
(1) high-temperature diffusion of electroslag ingots:
placing the electroslag ingot into a heating furnace, rapidly heating to 350 ℃, then heating to 630 ℃ at a heating rate of 60 ℃/h, preserving heat for 4h, then heating to 830 ℃ at a heating rate of 80 ℃/h, preserving heat for 4h, then heating to 1280 ℃ at a heating rate of 100 ℃/h, preserving heat for 12h, then soaking for 4h when the temperature is reduced to 1270 ℃, and then carrying out a three-upsetting-three-drawing process;
(2) high-temperature diffusion of process blank:
and (3) heating the process blank subjected to the three heading and three drawing to 1260 ℃ at the heating rate of 80 ℃/h, and preserving heat for 20h to finish the subsequent process.
The product of this example, H13 die steel, impact energy 305J, was made after the homogenization process.
It can be seen from the three embodiments that, after the homogenization production method provided by the invention is adopted, the impact energy of the prepared finished product H13 die steel is greatly improved (all reaching more than 300J), compared with the prior art, the impact energy performance is greatly improved, the service life of the die is greatly prolonged, the product competitiveness of enterprises is enhanced, and the homogenization production method has extremely high economic benefit and is suitable for wide popularization and application.
Claims (1)
1. A homogenizing production method for improving the impact energy of H13 die steel is characterized by comprising the following steps:
(1) high-temperature diffusion of electroslag ingots:
putting the electroslag ingot into a heating furnace, rapidly heating to 300-400 ℃, then heating to 600-650 ℃ at a heating rate of 50-60 ℃/h, preserving heat for 2-4 h, then heating to 800-850 ℃ at a heating rate of 70-80 ℃/h, preserving heat for 2-4 h, then heating to 1280 ℃ at a heating rate of 60-100 ℃/h, and preserving heat, wherein the heat preservation time is determined by the diameter D of the electroslag ingot, specifically, when the diameter D of the electroslag ingot is less than 650mm, the heat preservation time is 8h, when the diameter D of the electroslag ingot is not more than 650mm and not more than 780mm, the heat preservation time is 10h, when the diameter D of the electroslag ingot is more than 780mm, the heat preservation time is 12h, then, when the temperature is reduced to 1270 ℃, soaking for 4h, and then carrying out a three-heading three-drawing process;
high-temperature diffusion of the process blank:
and (3) heating the process blank subjected to three heading and three drawing to 1260 ℃ at the heating rate of 80-100 ℃/h, and preserving heat, wherein the heat preservation time is determined by the diameter d of the electroslag ingot, and specifically comprises the following steps: when the diameter d of the process blank is less than 650mm, the heat preservation time is 14h, when the diameter d of the process blank is more than or equal to 650m and less than or equal to 780mm, the heat preservation time is 16h, and when the diameter d of the process blank is more than 780mm, the heat preservation time is 20 h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210614196.8A CN114921626A (en) | 2022-06-01 | 2022-06-01 | Homogenization production method for improving impact energy of H13 die steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210614196.8A CN114921626A (en) | 2022-06-01 | 2022-06-01 | Homogenization production method for improving impact energy of H13 die steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114921626A true CN114921626A (en) | 2022-08-19 |
Family
ID=82811905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210614196.8A Pending CN114921626A (en) | 2022-06-01 | 2022-06-01 | Homogenization production method for improving impact energy of H13 die steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114921626A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115896594A (en) * | 2022-11-09 | 2023-04-04 | 成都先进金属材料产业技术研究院股份有限公司 | High-strength high-toughness H13 die steel for aluminum extrusion and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177258A (en) * | 2015-10-21 | 2015-12-23 | 冯英育 | Production method of high-toughness high-isotropy large-section hot working die steel |
| CN106521124A (en) * | 2016-08-26 | 2017-03-22 | 湖北东舟重工科技股份有限公司 | Forked flattening, upsetting, and rolling H13 hot-working die steel homogenization forging technology |
| CN112226593A (en) * | 2020-10-14 | 2021-01-15 | 浙江赛克思精锻科技有限公司 | Preparation production process for improving toughness and isotropy of hot-work die steel |
-
2022
- 2022-06-01 CN CN202210614196.8A patent/CN114921626A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177258A (en) * | 2015-10-21 | 2015-12-23 | 冯英育 | Production method of high-toughness high-isotropy large-section hot working die steel |
| CN106521124A (en) * | 2016-08-26 | 2017-03-22 | 湖北东舟重工科技股份有限公司 | Forked flattening, upsetting, and rolling H13 hot-working die steel homogenization forging technology |
| CN112226593A (en) * | 2020-10-14 | 2021-01-15 | 浙江赛克思精锻科技有限公司 | Preparation production process for improving toughness and isotropy of hot-work die steel |
Non-Patent Citations (1)
| Title |
|---|
| 张曜: ""提升 H13 热作模具钢质量的工艺研究"" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115896594A (en) * | 2022-11-09 | 2023-04-04 | 成都先进金属材料产业技术研究院股份有限公司 | High-strength high-toughness H13 die steel for aluminum extrusion and preparation method thereof |
| CN115896594B (en) * | 2022-11-09 | 2024-04-26 | 成都先进金属材料产业技术研究院股份有限公司 | High-strength and high-toughness H13 die steel for aluminum extrusion and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102418042B (en) | Novel manufacturing process of phi 300 mm-phi 700 mm high-carbon high-chromium cold-working die steel forged round steel | |
| CN110438310B (en) | Hot work die steel and heat treatment method thereof | |
| CN109161780B (en) | Method for improving processing performance of FeCrNiAl-based high-entropy alloy | |
| CN112589022B (en) | Method for manufacturing high-quality hard-to-deform high-temperature alloy low-segregation fine-grain bar | |
| CN104694832B (en) | Martensitic stainless steel for nuclear reactor and preparation method of stainless steel | |
| CN108893689B (en) | Inconel718 alloy disc forging homogenizing manufacturing method | |
| CN110306108A (en) | A kind of high tenacity high cracking resistance hot die steel and its manufacturing method | |
| CN112375982B (en) | Process for forging round steel by using superfine chromium-molybdenum hot-working die steel | |
| CN113403531B (en) | High-heat-strength high-toughness hot-work die steel and manufacturing process thereof | |
| CN106756685A (en) | A kind of method for refining nickel-based high-temperature alloy forge piece grain structure | |
| CN110614338B (en) | Forging method of GH4169 alloy steel round bar | |
| CN103981347A (en) | Processing method for grain refinement of CrNiMoV high pressure steel forging | |
| CN106544540A (en) | A kind of high intensity, high rigidity, wear-resisting precious metal alloys and preparation method | |
| CN108441613B (en) | A kind of anti-white point control method of age-hardening plastic mould steel | |
| CN110468348B (en) | 022Cr19Ni10 stainless steel flange for nuclear power station and manufacturing method thereof | |
| CN114921626A (en) | Homogenization production method for improving impact energy of H13 die steel | |
| CN104099529B (en) | A kind of steel pipe perforating heading and preparation method thereof | |
| CN103993144A (en) | Method for production of H13 die steel by bloom continuous casting | |
| CN112593059B (en) | Thermal deformation method for reducing delta ferrite content in martensitic stainless steel | |
| CN113215489A (en) | High-strength-plasticity low-chromium nickel-saving type duplex stainless steel and stretching preparation method thereof | |
| CN109457118B (en) | Method for reducing white spots in 10Ni3MnCuAl steel | |
| CN115537633B (en) | Hot work die steel and production method thereof | |
| CN110846552A (en) | Forging method of martensitic stainless steel main shaft | |
| CN108866299B (en) | Forging heat treatment method of Cr12MoV steel | |
| CN104646955A (en) | Method for preparing 20CrNi4 piercing plug |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220819 |