CN102418046A - Novel multi-component alloy groove lining plate - Google Patents

Abstract

The invention relates to a novel multi-component alloy groove lining plate which is characterized by comprising the following chemical components in percentage by weight: 0.38-0.45 percent of C, 1.5-1.8 percent of Si, 1.7-2.0 percent of Cr, 0.3-0.4 percent of Mn, 0.2-0.4 percent of Re, less than or equal to 0.02 percent of S, less than or equal to 0.03 percent of P and the balance Fe. The novel multi-component alloy groove lining plate has the characteristics that: by adopting a subsection heating and heat preserving and interrupted hardening process, the functions of refining crystal particles, purifying grain boundary and improving the hardenability and the uniformity of tissues and performance can be achieved, the hardness HRC of products is more than or equal to 56 and the impact ductility ak is more than or equal to 25J.cm<2> and the service life is prolonged by three times.

Description

The multielement alloy trench liner

Technical field

The present invention relates to low-alloy Development of Wear Resistant Steel field, relate in particular to a kind of multielement alloy trench liner that is used for ball mill.

Background technology

Liner plate is a kind of consumable accessory that the consumption used on the ball mill is only second to abrading-ball; At present domestic and international ball mill wearing liner plate; Adopt one group of II-B, II-C, II-D and the II-E cast alloy iron that provides among ANS ANSI/ASTM, the A532-82 like domestic employing ZGMn13, the U.S.; The abrasion-proof backing block that adopts these trades mark to process mainly is applicable to the abrasive wear operating mode of high firmness, and like ore and sandstone etc., these materials produce work hardening in the course of processing; Perhaps itself have very high hardness, reach resistance to wear, the purpose of long service life.The liner plate of this material is applied on the medium-hard abrasive material of processing then exists some defectives,,, can not produce work hardening, thereby abrasion resistance can meet the demands because abrasive hardness is softer for material with work hardening characteristic.In common high hardness material scope, then, can't keep certain impelling strength, at work fracture easily because of hardness is high.The steel alloy liner plate of this area researchdevelopment in modern age is main with medium carbon alloy steel mainly; Adopt casting, annealing, quenching, tempering process, it is more that its composition contains Cr, Mo, Cu noble metal, and product cost is also high; Difficult technique is with control; Toughness does not reach requirement, and it is also high to use unit consumption, can not reach desirable level.

Summary of the invention

The present invention provides a kind of multielement alloy trench liner that is used for ball mill in order to overcome the deficiency of above technology, and it can obtain higher hardness and impelling strength, to reach the purpose that improves work-ing life.

Technical scheme of the present invention is: the multielement alloy trench liner; Said liner plate steel chemical ingredients by weight percentage is: C:0.38～0.45%, Si:1.5～1.8%, Cr:1.7～2.0%, Mn:0.3～0.4%, Re:0.2～0.4%, S≤0.02%, P≤0.03%, surplus are Fe;

Obtain the goods of product hardness HRC >=56, impelling strength ak >=25Jcm2 through batching, smelting, cast, polishing, heat tracing, quenching, oil cooling, tempering, cooling step;

Described heat tracing step is to take the heating of four sections warm areas, is incubated after every section warm area heating, is warmed up to the preparation of quenching of 920 ℃ of quenching temperatures at last;

Described quenching step is that work in-process are come out of the stove after 920 ℃ of constant temperature of quenching temperature keep accomplishing, and goes into water quenching; The temperature of water coolant is 30 ± 2 ℃ during quenching, and the cool time determines according to the liner plate sized;

Described oil cooling step be with work in-process after quenching, go into oil cooling in the oil sump; The temperature of cooling oil is 80 ± 2 ℃ during oil cooling, and the oil cooling time determines according to the liner plate sized;

Described tempering step is that the work in-process behind the oil cooling are heated to 220 ± 2 ℃ of tempering temperatures, and segmentation is slowly cooled off after constant temperature keeps accomplishing, and the time that its constant temperature keeps is 4 hours;

Described heat tracing step comprises following operation:

1) with work in-process dress basket, is fed into heat treatment furnace;

2) being heated to 350 ℃ → constant temperature kept 80 minutes;

3) being heated to 550 ℃ → secondary constant temperature kept 100 minutes;

4) being heated to 750 ℃ → three times constant temperature kept 120 minutes;

5) being heated to 920 ℃ → four times constant temperature kept 120 minutes.

Described oil cooling adopts national standard isothermal hierarchical quenching oil.

The described cool time is confirmed with reference to following table according to the liner plate sized;

Specification	Water temperature (℃)	Entry (quenching) time (min)
			2 ripples	30±2	60
3 ripples	30±2	65
			4 ripples	30±2	70
5 ripples	30±2	80
			6 ripples	30±2	90
7 ripples	30±2	100

The described oil cooling time is confirmed with reference to following table according to the liner plate sized;

Specification	The oil temperature (℃)	The oil cooling time (min)
			2 ripples	80±2	2
3 ripples	80±2	2.5
			4 ripples	80±2	3
5 ripples	80±2	3.5
			6 ripples	80±2	4
7 ripples	80±2	4.5

The beneficial effect that the present invention had: owing to fully take into account the anufacturability of liner plate during the chemical composition design of liner plate; Factor such as application conditions and flexibility through chemical ingredients and the zone heating insulation and the double quenching technology of appropriate design liner plate, obtains the high firmness of HRC >=56 of liner plate; Impelling strength reaches ak >=25Jcm2; This liner plate has wear-resisting, the shock-resistant and corrosion resistant impact of performance, is particularly suitable on wet grinding mill, using, and the life-span is high more than 2 times than other liner plate.Because chemical ingredients does not have special noble metal, content does not surpass 3%, and with low cost, liner plate is indeformable, does not crack, and air safety, pollution-free is the best renewal product of using liner plate at present.

Description of drawings

Fig. 1 is a multielement alloy trench liner quenching technology graphic representation of the present invention.

Embodiment

Reach technique means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; Embodiment, method, step, characteristic and effect thereof to the multielement alloy trench liner that proposes according to the present invention specify as follows.

Embodiment 1:

Alloying constituent by weight percentage is: 0.38%C, 1.6%Si, 2.0%Cr, 0.3%Mn, 0.4%Re, 0.03%P, 0.02%S, surplus is Fe.The warp batching → 1500 ℃ of sand mold casting chamber internal cooling moulding that are cast to required liner plate shape; In the time of 190 ℃, shake out 350 ℃, 80 minutes → 550 ℃ of insulations, 100 minutes → 750 ℃ of insulations, 120 minutes → 920 ℃ of insulations, insulation 60 minutes → 80 ℃ oil coolings of 120 minutes → 30 ℃ shrends 2 minutes → 220 ℃ tempering 4 hours → furnace cooling to 150 of polishing → be warming up to of condensation rear lining plate ℃ is come out of the stove; Back naturally cooling obtains final liner plate product; Product hardness HRC=56, impelling strength ak=25Jcm2.

Embodiment 2:

Alloying constituent by weight percentage is: 0.45%C, 1.5%Si, 1.7%Cr, 0.4%Mn, 0.3%Re, 0.02%P, 0.01%S, surplus is Fe.The warp batching → 1530 ℃ of sand mold casting chamber internal cooling moulding that are cast to required liner plate shape; In the time of 190 ℃, shake out 350 ℃, 80 minutes → 550 ℃ of insulations, 100 minutes → 750 ℃ of insulations, 120 minutes → 920 ℃ of insulations, insulation 80 minutes → 79 ℃ oil coolings of 120 minutes → 31 ℃ shrends 3.5 minutes → 222 ℃ tempering 4 hours → furnace cooling to 150 of polishing → be warming up to of condensation rear lining plate ℃ is come out of the stove; Back naturally cooling obtains final liner plate product; Product hardness HRC=58, impelling strength ak=28Jcm2.

Embodiment 3:

Alloying constituent by weight percentage is: 0.4%C, 1.8%Si, 1.8%Cr, 0.3%Mn, 0.2%Re, 0.02%P, 0.02%S, surplus is Fe.The warp batching → 1550 ℃ of sand mold casting chamber internal cooling moulding that are cast to required liner plate shape; In the time of 190 ℃, shake out 350 ℃, 80 minutes → 550 ℃ of insulations, 100 minutes → 750 ℃ of insulations, 120 minutes → 920 ℃ of insulations, insulation 100 minutes → 82 ℃ oil coolings of 120 minutes → 30 ℃ shrends 4.5 minutes → 219 ℃ tempering 4 hours → furnace cooling to 150 of polishing → be warming up to of condensation rear lining plate ℃ is come out of the stove; Back naturally cooling obtains final liner plate product; Product hardness HRC=59, impelling strength ak=27Jcm2.

The above is merely one embodiment of the present invention; It or not whole or unique embodiment; The conversion of any equivalence that those of ordinary skills take technical scheme of the present invention through reading specification sheets of the present invention is claim of the present invention and contains.

Claims (2)

1. multielement alloy trench liner; It is characterized in that: said liner plate steel chemical ingredients by weight percentage is: C:0.38～0.45%, Si:1.5～1.8%, Cr:1.7～2.0%, Mn:0.3～0.4%, Re:0.2～0.4%, S≤0.02%, P≤0.03%, surplus are Fe;

Obtain the goods of product hardness HRC >=56, impelling strength ak >=25Jcm2 through batching, smelting, cast, polishing, heat tracing, quenching, oil cooling, tempering, cooling step;

Described heat tracing step is to take the heating of four sections warm areas, is incubated after every section warm area heating, is warmed up to the preparation of quenching of 920 ℃ of quenching temperatures at last;

Described quenching step is that work in-process are come out of the stove after 920 ℃ of constant temperature of quenching temperature keep accomplishing, and goes into water quenching; The temperature of water coolant is 30 ± 2 ℃ during quenching, and the cool time determines according to the liner plate sized;

Described oil cooling step be with work in-process after quenching, go into oil cooling in the oil sump; The temperature of cooling oil is 80 ± 2 ℃ during oil cooling, and the oil cooling time determines according to the liner plate sized;

Described tempering step is that the work in-process behind the oil cooling are heated to 220 ± 2 ℃ of tempering temperatures, slowly cooling after constant temperature keeps accomplishing, and the time that its constant temperature keeps is 4 hours;

2. multielement alloy trench liner according to claim 1 is characterized in that: described heat tracing step comprises following operation:

1) with work in-process dress basket, is fed into heat treatment furnace;

2) being heated to 350 ℃ → constant temperature kept 80 minutes;

3) being heated to 550 ℃ → secondary constant temperature kept 100 minutes;

4) being heated to 750 ℃ → three times constant temperature kept 120 minutes;

5) being heated to 920 ℃ → four times constant temperature kept 120 minutes.

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