High-quality alloy tool steel 42 CrMo4 quenched and tempered steel plate and production method thereof

Abstract

The invention discloses a high-quality alloy tool steel 42 CrMo4 quenched and tempered steel plate. The high-quality alloy tool steel 42 CrMo4 quenched and tempered steel plate is subjected to KR molten iron pretreatment, converter smelting, argon blowing treatment, LF refining, VD refining, continuous casting, heating, rolling, stack cooling, heat treatment, on the basis of ensuring that the customer requires 42 CrMo4 components, harmful elements such as P and S in the steel are strictly controlled in the smelting process, and the purity of the molten steel is guaranteed to basically reach the level of a clean steel. In the rolling process, high-temperature low-speed and heavy reduction uniform tissues are adopted, so that the quality of the flaw detection is ensured; the harmful gas in the steel plate is diffused through the high-temperature stack cooling, and the flaw detection is consolidated; the steel plate is subjected to high-temperature tempering treatment at 730 DEG c beforethe steel plate is subjected to thermal refining in order to prevent the steel plate from being subjected to fire cutting and aging cracking; the macro quality of steelmaking is controlled to reach the grade c of 0.5 grades, the good macro quality ensures that the steel plate cannot be cracked after the steel plate is quenched, and finally the performance of the 42 CrMo4 steel plate with the customer requirement is obtained through proper tempering temperature.

Description

technical field [0001] The invention belongs to the technical field of high-quality alloy tool steel production, and specifically relates to a high-quality alloy tool steel 42CrMo4 quenched and tempered steel plate and a production method thereof. Background technique [0002] Currently in the market, 42CrMo4 and other high-strength alloy tool steels are mostly tempered (T) for delivery, and only small samples are subjected to quenching and tempering tests. After delivery, customers cut small pieces and then undergo quenching and tempering treatment. This method brings inconvenience to customers and improves The cost of customers has been increased, and the demand of the market cannot be met as soon as possible. Contents of the invention [0003] In view of the above problems, the purpose of the present invention is to provide a high-quality alloy tool steel 42CrMo4 quenched and tempered steel plate, which can be quenched and tempered before the large plate is made and del...

AI Technical Summary

Problems solved by technology

[0002] Currently in the market, 42CrMo4 and other high-strength alloy tool steels are mostly tempered (T) for delivery, and only small samples are subjected to quenching and tempering tests. After delivery, customers cut small pieces and then undergo quenching and tempering treatment. This method brings inconvenience to customers and improves The customer's cost is reduced, and the market demand cannot be met as soon as possible

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