Super-plastic and non-oxidation method of welding and splicing steel to mechanical blades
A mechanical blade and superplastic technology, applied in welding equipment, non-electric welding equipment, arc welding equipment, etc., can solve the problems of hindering the continuity of rolling welding and large difference in high temperature plasticity, so as to avoid overheating and overburning and improve the internal Quality, the effect of improving product quality
Inactive Publication Date: 2012-02-22
常州机械刀片有限公司
View PDF5 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] In order to overcome the problem that the high-temperature plasticity difference between the existing blade steel and low-carbon steel hinders the continuity of each rolling and welding, the present invention provides a method for superplastic oxidation-free welding of mechanical blades.
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
[0030] A superplastic oxidation-free welding steel insert technology for mechanical blades. First, argon arc welding is used to weld and close the boundary of the joint surface between the high-alloy steel blade steel and the Q235 low-carbon steel cutter body so that it does not continue to oxidize, such as figure 1 shown.
[0031] Secondly, cyclic heating near the α→γ phase transition temperature of the high-alloy steel blade steel makes the blade steel and the cutter body reach an ultra-fine equiaxed grain structure. The technical conditions are:
[0032] (1) Heat the temperature of the box-type air medium furnace to 840°C for heat preservation, then cool down to 700°C for 20 minutes, and cycle 2 to 4 times;
[0033] (2) The grain size of high-alloy blade steel is 1 μm to 5 μm, and the grain size of Q235 steel knife body is less than 10 μm, which meets the microstructural conditions of superplastic deformation;
[0034] Then, use non-vacuum insulation roller press equipment...
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 |
|---|---|---|
| particle size | aaaaa | aaaaa |
| length | aaaaa | aaaaa |
| crystal size | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to the technical field of mechanical blade manufacture, in particular to a super-plastic and non-oxidation method of welding and splicing steel to mechanical blades, which includes that first, high alloy steel shear-steel and a low-carbon steel cutter body are welded to be sealed and not to be oxidized continuously along the edge of the combination face of the high alloy steel shear-steel and the low-carbon steel cutter body through argon arc welding, second, the high alloy steel shear-steel is heated circularly at the position close to phase-transition temperature of the high alloy steel shear-steel so as to enable the shear-steel and the cutter body to reach an ultra-thin isometric crystal structure, then a non-vacuum heat preservation roller press machine device is adopted to achieve super-plastic and non-oxidation solid phase welding in fluctuation strain mode and through tiny strain rate, and finally cutter blank enters a high-temperature furnace for heating, is performed with high-temperature molding press rolling and welding diffusion and is cooled in pile after being rolled. By means of the super-plastic and non-oxidation method of welding and splicing the steel to the mechanical blades, the cutter blank with good shear-steel quality and high steel splicing tightness can be obtained. The super-plastic and non-oxidation method of welding and splicing the steel to the mechanical blades does not need a vacuum device and improves yield and shear-steel quality of the procedure of splicing steel to the high alloy steel mechanical blades.
Description
technical field [0001] The invention relates to the technical field of preparation of mechanical blades, in particular to a method for superplastic oxidation-free welding of mechanical blades with inlaid steel. Background technique [0002] Mechanical blades are cutting tools for raw materials and product processing in industries such as papermaking, printing, wood, and plywood. Degree is one of the keys to blade quality. The current steel inlay technology mainly includes non-oxidized hot-rolled steel inlay and hot-rolled flux inlaid steel. The former has high welding firmness and has become the development direction. However, high alloy steel blade steel hot-rolled inlaid steel must be carried out at a higher temperature than steel forging and rolling. The heating temperature reaches 1200 ° C ~ 1240 ° C, and the initial rolling temperature is 1140 ° C ~ 1180 ° C. The temperature often exceeds the blade steel process specification. If the heating temperature is too high, t...
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): B23K28/02B23K9/16B23K20/04B23K20/227B23K101/20
Inventor 马永庆刘国方章晓静
Owner 常州机械刀片有限公司