Unlock instant, AI-driven research and patent intelligence for your innovation.
A temperature-controlled cooling heat treatment process for semi-solid forming of high-carbon and high-alloy steel
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A semi-solid forming, high-alloy steel technology, applied in the field of heat treatment of metal materials, can solve the problems of long production process and so on
Active Publication Date: 2021-05-18
UNIV OF SCI & TECH BEIJING
View PDF10 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Unlike steel for engineering structures, which are mostly delivered in large quantities by steel mills, steel materials (such as bearings, tools, etc.) used in machinery manufacturing and other fields generally require manufacturers to start with billets for casting or forging forming, machining, heat treatment, etc. The final parts and components can only be prepared after complex production processes, and the production process is relatively long
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0036] In this embodiment, a high-carbon high-alloy steel semi-solid forming temperature-controlled cooling heat treatment process includes:
[0037] (1) The semi-solid material is 9Cr18 stainless steel, and its chemical composition is: C 0.97, Cr 17.33, Si0.52, Mn 0.35, P 0.02, S 0.005, and the rest is Fe. The solidus temperature of the material was determined to be 1289°C and the liquidus temperature was 1423°C by differential scanning calorimetry (DSC). The semi-solid billet is prepared by the wave-shaped inclined plate method.
[0038] (2) Semi-solid thixotropic forging forming: heat the semi-solid billet to 1300°C, keep it warm for 15 seconds, press and form it, and the forming rate is 0.6-30mm / s to obtain a semi-solid product.
[0039] (3) Take out the semi-solid part and quickly cool it to room temperature with water. At this time, the solid phase of the obtained microstructure is austenite with a hardness of 330HV, and the liquid phase is a eutectic structure with a h...
Embodiment 2
[0042] In this example:
[0043] (1) The semi-solid material is M2 high-speed steel, and its chemical composition is: C 0.85, W 5.71, Mo 4.71, Cr 4.03, V 1.82, Si 0.36, Mn 0.35, P 0.026, S 0.009, and the rest is Fe. The solidus temperature of the material was determined to be 1229°C and the liquidus temperature was 1447°C by differential scanning calorimetry (DSC). The semi-solid billet is prepared by the wave-shaped inclined plate method.
[0044] (2) Heat the M2 semi-solid billet to 1280°C, and after holding it for 15 seconds, quickly transfer the semi-solid sample to the heat treatment furnace chamber with different preheating temperatures. The preset temperatures are 1200°C, 800°C, and 400°C, respectively. Insulate for 20 minutes, and rapidly cool the sample to room temperature after the insulated treatment is completed.
[0045] (3) For samples with different cooling methods, the dissolution and precipitation of carbides in the microstructure are different. After heat p...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
solidus temperature
aaaaa
aaaaa
liquidus temperature
aaaaa
aaaaa
solidus temperature
aaaaa
aaaaa
Login to View More
Abstract
The invention relates to the technical field of heat treatment of metal materials, and provides a high-carbon and high-alloy steel semi-solid forming temperature-controlled cooling heat treatment process, in which the high-carbon and high-alloy steel is heated to a semi-solid temperature range, kept for a predetermined time, and completed on a pressure testing machine Semi-solid forming to obtain a semi-solid formed part; cooling the semi-solid formed part under temperature control; and performing subsequent heat treatment on the treated semi-solid formed part. In the present invention, after heating the high-carbon high-alloy steel to the semi-solid temperature range, the microstructure of the alloy steel is regulated from a new angle by utilizing the different aggregation modes of the alloy elements in the solid phase and the liquid phase; Process flow, improve the heat treatment process, and obtain the required performance of the material by adjusting the structure of the material.
Description
technical field [0001] The invention relates to the technical field of heat treatment of metal materials, in particular to a heat treatment process for semi-solid forming of high-carbon high-alloy steel with temperature-controlled cooling. Background technique [0002] Heat treatment plays a vital role in improving the internal structure of metal materials and achieving the required performance of materials. High-carbon and high-alloy steel belongs to the category of ledeburite steel, which is widely used in the fields of bearings, tools and molds and other parts. Unlike steel for engineering structures, which are mostly delivered in large quantities by steel mills, steel materials (such as bearings, tools, etc.) used in machinery manufacturing and other fields generally require manufacturers to start with billets for casting or forging forming, machining, heat treatment, etc. The final component products can only be prepared after complicated production procedures, and the...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More