Method and apparatus for predicting overall hardness of target steel after heat treatment
A hardness and steel technology, which is applied in the field of predicting the overall hardness of steel after heat treatment, can solve the problems of inaccurate prediction accuracy and inaccurate prediction results, and achieve the effect of improving accuracy
Inactive Publication Date: 2016-10-19
SHANGHAI JIAO TONG UNIV +1
View PDF2 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0014] However, the prediction of the overall hardness of the heat-treated steel obtained by this method is not accurate enough
[0015] Another example is that Patent Document 1 only considers the influence of alloying elements in the steel and the grain size of prior austenite when predicting the above-mentioned overall hardness, and its prediction accuracy is not accurate enough.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0042]
[0043] Grain Size of Prior Austenite In the present invention, the overall hardness of the target steel after heat treatment is predicted based on the volume fraction and single-phase hardness of each single phase of the target steel after heat treatment.
[0044] Here, the volume fraction of each single phase refers to the ratio of the single-phase structure corresponding to a single phase j in the heat-treated target steel to the volume of the heat-treated target steel (that is, the percentage content mentioned above ). This volume fraction can be obtained by common technical means in this field, such as observing the target steel material after heat treatment with a metallographic microscope, and knowing the types of each single phase and each single phase of the target steel material after heat treatment in a visual manner. The proportion of the single-phase structure corresponding to the phase in the target steel. In addition, for example, the type of each sin...
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 |
|---|---|---|
| hardness | aaaaa | aaaaa |
| crystal size | aaaaa | aaaaa |
| hardness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a method and an apparatus for predicting the overall hardness of a piece of target steel after heat treatment. The method comprises: a step of establishing a single-phase hardness calculation formula including a first single-phase hardness calculation formula and a second single-phase hardness calculation formula; a step of observing the target steel via a metallographic microscope or subjecting the target steel to CCT-curve test to obtain the type of each single phase and a volume fraction of each single phase in the target steel; a step of calculating the single-phase hardness of each single phase in the target steel by using the first single-phase hardness calculation formula and / or the second single-phase hardness calculation formula based on the type of each single phase in the target steel; and a step of predicting the overall hardness based on the volume fraction and the single-phase hardness of each single phase in the target steel. By means of the present invention, the accuracy of predicting the overall hardness of the heat-treated steel can be improved.
Description
technical field [0001] The invention relates to a method and a device for predicting the overall hardness of an object steel material after heat treatment, and belongs to the technical field of metal heat treatment. Background technique [0002] The material hardness of steel after heat treatment is an important index to test the performance of steel after heat treatment, and it is an important basis for judging the reliability of parts made of heat-treated steel. At the same time, the hardness prediction model is also an essential parameter in heat treatment simulation. At present, there are few models for predicting the hardness of materials. Basically, the hardness of each single-phase structure in the heat-treated steel is directly summed according to the percentage to obtain the overall hardness of the heat-treated steel (that is, the material hardness). It only considers the effect of the original austenite grain size and chemical composition (such as carbon content) ...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 顾剑锋徐骏廖建雄朴胜焕
Owner SHANGHAI JIAO TONG UNIV