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Steel plate for plastic mold for rolling continuous casting slab with thickness of 400mm and production method of steel plate

A technology for plastic molds and continuous casting billets, applied in the field of mold steel, can solve the problems of poor flaw detection performance and uneven hardness distribution, and achieve the effects of low production cost, uniform hardness distribution, and uniform hardness

Active Publication Date: 2013-11-20
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of uneven hardness distribution and poor flaw detection performance

Method used

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  • Steel plate for plastic mold for rolling continuous casting slab with thickness of 400mm and production method of steel plate
  • Steel plate for plastic mold for rolling continuous casting slab with thickness of 400mm and production method of steel plate
  • Steel plate for plastic mold for rolling continuous casting slab with thickness of 400mm and production method of steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This implementation example is a production process of using a 400mm thick continuous casting slab to produce a 60mm steel plate for plastic molds. The flaw detection performance of the steel plate meets the requirements of GB / T 2970 Class I, and its composition weight percentage is shown in Table 1:

[0022] Table 1 Chemical composition, the balance is Fe

[0023]

[0024] The production process is carried out according to the following procedures:

[0025] (1) Using molten iron pretreatment and converter smelting, after LF furnace refining and RH vacuum treatment, through continuous casting with a 400mm large-section casting machine into an ultra-thick continuous casting slab;

[0026] (2) After the continuous casting slab is treated with pile cooling, it is sent to the heating furnace for heating at 460°C. The heating temperature is 1190°C, and the heating time is 3.5h;

[0027] (3) One-stage controlled rolling with a reduction rate of 22%-30% in a single pass, a...

Embodiment 2

[0030] This implementation example is the production process of using 400mm thick continuous casting slabs to produce 100mm steel plates for plastic molds. The flaw detection performance of steel plates meets the requirements of GB / T 2970 Class I, and its composition weight percentages are shown in Table 1:

[0031] Table 2 Chemical composition, the balance is Fe

[0032]

[0033] The production process is carried out according to the following procedures:

[0034] (1) Using molten iron pretreatment and converter smelting, after LF furnace refining and RH vacuum treatment, through continuous casting with a 400mm large-section casting machine into an ultra-thick continuous casting slab;

[0035] (2) The continuous casting slab is treated by stacking and cooling, and sent to the heating furnace for heating at 480°C. The heating temperature is 1190°C, and the heating time is 3.5h;

[0036] (3) One-stage controlled rolling with a single pass of 21%-27% large reduction ratio is...

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Abstract

The invention provides a steel plate for a plastic mold for rolling a continuous casting slab with the thickness of 400mm and a production method of the steel plate, belonging to the technical field of mold steel. The steel plate comprises the following chemical components in percentage by weight: 0.3-0.5% of C, 0.2-0.5% of Si, 1.0-1.6% of Mn, at most 0.008% of P, at most 0.006% of S, 0.02-0.05% of Al, 1.3-2.5% of Cr, 0.1-0.6% of Mo and the balance of Fe and unavoidable impurities. The steel plate for the plastic mold, which has HB (Brinell Hardness) of 290-330 and has favorable ultrasonic flow detection performance, can be produced successfully and stably through converter melting, LF (Low Frequency) furnace refining, RH (Relative Humidity) vacuum treatment, continuous casting of a 400-mm thick large-section casting machine, casting blank stack cooling, hot charging and hot feeding, large-deflection controlled rolling, steel plate stack cooling, normalizing and tempering heat treatment and obtainment of fine sorbite and troostite structures.

Description

technical field [0001] The invention belongs to the technical field of die steel, and in particular relates to a steel plate for rolling plastic molds with a thickness of 400mm and a production method thereof. Wide and thick plate production line for thick end face continuous casting machine. Background technique [0002] Prior to the present invention, Patent No.: 201210264180.5 A production method of steel plates for plastic molds with a thickness of 150mm-400mm, using gas shielded welding, submerged arc welding and vacuum electron beam combined welding process or full vacuum electron beam welding forming method, two The block billet is welded into an ultra-thick billet to produce 150mm-40mm thick steel plate for plastic molds. This process needs to grind and polish the surface of the two billets before production, and the finish must be excellent, otherwise it will be difficult to ensure the quality of the core of the cast billet after welding, and it will easily cause c...

Claims

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Application Information

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IPC IPC(8): C22C38/38C22C38/22C21D8/02
Inventor 张苏渊邹扬朱振华顾林豪刘春明姜中行麻庆申王海宝
Owner SHOUGANG CORPORATION
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