CN1035271C - Anti-shock high strength silicon steel sheet - Google Patents

Abstract

The present invention relates to a silicon steel sheet with hitting resistance and high intensity, which is prepared from the following chemical components of the proportion by weight: 1.50% to 3.30% of silicon, at most 0.10% of carbon, 0.80% to 2.50% of manganese, 0.05% to 0.15% of phosphorus, at least 0.03% of sulfur, and ferrum as the rest. The silicon steel sheets of the present invention not only ensures favorable electromagnetic performance, but also has favorable hitting resistance, so the present invention is an ideal material for manufacturing iron cores of magnet switches of novel alternating current contactors.

Description

Anti-shock high strength silicon steel sheet

A kind of anti-shock high strength silicon steel sheet the present invention relates to the alloy field.

With siliconized plate. establishes a capital the silicon steel sheet chemical composition Existing electrician is to be main performance index with electromagnetic performance (magnetic induction density and iron-loss per unit weight) for a long time really is to guarantee that electromagnetic performance is target, and the below is the composition regulation (mass percent) of existing all kinds of silicon steel: classification C Mn P S Si Fe hot rolling≤0.08 0.10～0.30≤0.05≤0.03 2.00～2.45 surplus cold rolling non-orientation≤0.015 0.15～0.35≤0.04≤0.02 1.50～3.15 surplus cold-rolled orientation 0.048～0.06 0.07～0.12≤0.015 0.023～0.029 2.80～3.05 surpluses

European patent application EP 0490617A2 discloses the method that a kind of manufacturing has the non-oriented magnetic band steel of fine magnetic property and outward appearance, in the chemical ingredients of disclosed band steel, the content of manganese is lower than 1.0%, and the content of manganese is low excessively, just may reduce the mechanical property of steel.

In the standard of silicon steel, mechanical property is only stipulated minimum number of bends, to guarantee the punching performance of silicon steel.But the appearance of present novel alternating current contactor switch, require the core material of electro-magnet not only to require to have electromagnetic performance preferably, and to have good anti-strike, the iron core that the hot rolled silicon steel sheet of 0.5 mm thick is made requires anti-cycle more than 1,000 ten thousand times.And the anti-cycle of iron core that existing 0.5 millimeter hot rolled silicon steel sheet is made is 3,000,000 sub-levels.

The object of the invention will be invented exactly and a kind ofly can be satisfied the electromagnetic performance requirement, can satisfy the anti-high strength silicon steel sheet that requires (cycle is more than 1,000 ten thousand times) that hits again.

The present invention improves anti-strike property by the Chemical Composition of adjusting former silicon steel.

Silicon steel is single ferritic structure.Anyly impel the element of second phase that disperse separates out and make the element of grain refining all cause electromagnetic performance to worsen.For guaranteeing electromagnetic performance preferably, can only adopt solution strengthening to improve intensity and anti-strike property.Silicon itself has significantly solid solution strengthening effect, and it is favourable to improving electromagnetic performance.But silicone content is too high, can cause fragility to increase, so should be controlled at below 3.3%.The solid solution strengthening effect of carbon is very big, but carbon is harmful element main in the silicon steel, and the finished product carbon content should be controlled at below 0.01% in silicon steel.

Manganese except that forming MnS, also exists with the substitutional solid solution form in silicon steel.It has than obvious effects ferritic solution strengthening.General 1% manganese that adds, the σ s of steel can improve 32N/mm ², and less to the electromagnetic performance influence of silicon steel, also can not cause fragility to increase, so manganese is comparatively ideal solution strengthening element.Especially when back chilling novel process is rolled in the hot rolled silicon steel sheet employing, because manganese can enlarge the austenite phase region, therefore can be under identical finishing temperature condition, reduce the preceding carbide amount of separating out of chilling, increase behind the chilling ratio of super saturated solid solution carbon in the steel, thus decarburization and recrystallization process when helping with after annealing.The disadvantageous effect that this causes with regard to the increase that has correspondingly reduced owing to manganese to the silicon steel electromagnetic performance.

Phosphorus is similar with silicon to the electromagnetic performance influence of siliconized plate, and it is a kind of solution strengthening element.But phosphorus easily causes the cold short of steel, generally all requires phosphorus content to be controlled at lower level when silicone content is higher.But find that through experimental study silicon and phosphorus are not simple stacks to the influence of steel brittleness.When silicone content less than 3.3% the time, add a spot of phosphorus, therefore the fragility of steel can not have bigger increase, but the solution strengthening and the electromagnetic performance of silicon steel had than favorable influence.So except the content that increases manganese, also improved the content of phosphorus in the present invention in right amount.Implement research adjustment repeatedly according to the our factory, composition of the present invention should be (mass percent):

Si C Mn P S Fe1.50～3.30 0.04～0.10＞1.0 to 2.50 0.05～0.15≤0.03 surpluses

Be embodiments of the invention below.

Adopt conventional silicon steel smelting technology to smelt, adopt the cogging of conventional hot rolling cogging technology then, hot-rolled silicon electric sheet craft is rolled into the finished product of 0.5 mm thick routinely, and adopts and roll the back emergency cooling process, then with the silicon steel sheet of trimmed size through conventional anneal.Below chemical ingredients of the present invention (mass percent) (wherein being for 0-1 and 0-2 number existing hot rolled silicon steel sheet as a comparison), mechanical property and electromagnetic performance.

Heat (batch) number	Chemical Composition	Mechanical property	Electromagnetic performance
				0-1 0-2 1 2 3 4 5	Surplus the Si C Mn P S Fe 2.46 0.06 0.19 0.025 0.018 surplus in the of 2.55 0.06 0.25 0.030 0.020 surplus in the of 2.84 0.08 1.25 0.09 0.015 surplus in the of 3.20 0.87 1.38 8.10 0.024 surplus in the of 1.80 0.09 2.40 0.13 0.021 surplus in the of 2.62 0.06 1.92 0.10 0.018 surplus in the of 2.46 0.06 2.05 0.11 0.018	σ bN/mm 2σ 2N/mm 2The anti-cycle 10 of δ (%) 4 425 310 25 365 435 320 24 386 525 420 23 ＞1000 550 470 21 ＞1000 510 410 25 ＞1000 530 430 23 ＞1000 530 435 24 ＞1000	B 25(T)P10/50 (W/kg) 1.54 2.02 1.55 1.90 1.48 2.00 1.47 2.14 1.51 2.25 1.47 2.20 1.48 2.16

As can be seen from the above table, the electromagnetic performance of the embodiment of the invention all can satisfy the B that requires of novel alternating current contactor switch ₂₅＞1.46T, P10/50＜2.5w/kg, then under δ % was on close level situation, σ b and σ s value were all apparently higher than former hot rolled silicon steel sheet for mechanical property, thereby the anti-blow performance of the embodiment of the invention has also satisfied the requirement of novel friendship alternating current contactor switch all more than 1,000 ten thousand times.

Embodiments of the invention can guarantee good electromagnetic performance, have good anti-strike again, and under suitable δ % level, intensity of the present invention is apparently higher than existing siliconized plate.Thereby the iron core of the 0.5mm hot rolled silicon steel sheet making of employing the present invention production, its electromagnetic performance and anti-cycle all can satisfy the requirement of novel alternating current contactor switch.

Claims (1)

1. an anti-shock high strength silicon steel sheet is characterized in that, chemical ingredients (mass percent) is: Si 1.50～3.30, and P 0.05～0.15, S≤0.03, and C 0.04～0.10, and Mn＞1.0 are to 2.50, surplus Fe.