Accelerating cooling technology after medium plate tempering
A technology of accelerated cooling and thick steel plate, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of low cooling rate, limiting the release of tempering capacity, etc., to achieve the effect of increasing cooling rate and improving yield strength
Active Publication Date: 2013-07-24
NANJING IRON & STEEL CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, in the prior art, no accelerated cooling process is used for the tempered medium-thick steel plate to improve certain properties of the tempered steel plate, and the low cooling rate of the tempered steel plate seriously limits the release of tempering capacity.
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 1
[0016] This embodiment is an accelerated cooling process for medium-thick steel plates after tempering, and the structure of the cooling equipment is as follows: figure 1 As shown, between every two rollers, two exhaust mist nozzles 2 are respectively arranged on the upper and lower sides of the steel plate 1, and the air mist nozzles 2 are evenly distributed along the width direction of the steel plate 1. In order to achieve a uniform cooling effect along the width direction of the steel plate, the front and rear two Exhaust mist nozzles 2 are arranged in a staggered manner. Each air mist nozzle has water and compressed air inlets. The water header and compressed air pipe are made of stainless steel. On the operation side, the water header and compressed air pipe are two headers in one set. Each is equipped with six shut-off valves to manually control the opening and closing. In this embodiment, the tempering temperature of a medium-thick steel plate with a thickness of 30 m...
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 |
|---|---|---|
| length | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a steel plate cooling technology in metallurgy industry, in particular to an accelerated cooling technology after medium plate tempering. Cooling equipment is two rows of aerial fog spray nozzles arranged above and below a medium plate, the aerial fog spray nozzles are uniformly distributed along the width direction of the medium plate and are arranged in a staggered way,and each aerial fog spray nozzle is provided with a water inlet and a compressed air inlet; the aerial fog spray nozzles are opened before the medium plate is taken out of a furnace after tempering, and after water quantity is stabilized, the medium plate is taken out from the tempering furnace and enters the cooling equipment for cooling; and the cooling speed of the medium plate in the cooling equipment is 3-5 DEG C / s. The accelerated cooling technology can improve the cooling speed of the steel plate, can improve certain performances of the steel plate after tempering, and also plays an important role in improving the offline tempo of the steel plate, and particularly partial alloy steel can quickly pass through a tempering brittle transition temperature area, therefore, the low-temperature impact toughness of the steel plate is improved.
Description
technical field [0001] The invention relates to a steel plate cooling process in the metallurgical industry, in particular to an accelerated cooling process for a medium-thick steel plate after tempering. Background technique [0002] In the conventional heat treatment process of medium and heavy plates, cooling in the air is adopted after normalizing. In order to increase the cooling rate of the steel plate, increase the production efficiency, and improve the mechanical properties of the steel plate, some normalizing production lines have successively developed normalizing accelerated cooling (NAC, Normalize accelerate cooling). After the process, the strength and toughness index of the steel plate can be controlled by adjusting the cooling rate after normalizing. This not only meets the customer's requirements for steel plate performance on the basis of saving alloy costs, but also plays a salvage role for some steel plates with unqualified performance indicators. However...
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 Patents(China)
IPC IPC(8): C21D9/00C21D1/18
Inventor 吴俊平杨兆根李晓燕李亚超
Owner NANJING IRON & STEEL CO LTD