CN1888092A

CN1888092A - Heat treatment process for antiwear ferrous metal material ZG35CrMnSiBRe

Info

Publication number: CN1888092A
Application number: CN 200510080088
Authority: CN
Inventors: 刘遵砚
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-06-29
Filing date: 2005-06-29
Publication date: 2007-01-03
Anticipated expiration: 2025-06-29
Also published as: CN100535136C

Abstract

The heat treatment process of antiwear ferrous metal material ZG35CrMnSiBRe includes the following steps: 1. annealing including raising the temperature of casting in 50 deg.c/hr to 650 deg.c, maintaining for 1 hr, heating to 930 deg.c, maintaining for 2-4 hr, lowering to 600 deg.c, maintaining for 30 min and air cooling the casting; 2 quenching including heating the quenched casting to 950 deg.c, maintaining for 2-3 hr, setting the casting into water within 10 sec, shifting the casting vertically inside water while maintaining water flow to keep water temperature below 50 deg.c for n sec, where n is the thickness of the casting in mm, and taking out the casting from water before the casting temperature reaches 200 deg.c; and 3. tempering through setting the casting into tempering furnace within 10 min after being taken outer from water, with the tempering being repeated for three times. The heat treatment process can increase the service life of the casting, and raise the hardness and wear resistance obviously.

Description

The treatment production technology of ferrous metal wear-resistant material-ZG35CrMnSiBRe

Technical field

The present invention relates to the ferrous material technical field of hot working, belong to the treatment production technology of a kind of ferrous metal wear-resistant material-ZG35CrMnSiBRe.

Background technology

At present, existing like product thermal treatment process mostly is oil quenching greatly, and its shortcoming is: pollution is big, potential safety hazard is big, poor, the bad mechanical property (hardness HRC45-50, ballistic work J≤10) of hardening capacity, and foundry goods can't satisfy the operating mode service condition.

Summary of the invention

The treatment production technology that the purpose of this invention is to provide one kind of multiple element cast steel wear-resistant material-ZG35CrMnSiBRe has the impelling strength of ZG35 and the hardness and the wear resistance of rich chromium cast iron through the foundry goods (ZG35CrMnSiBRe) of this explained hereafter; The toughness that satisfies working condition requirement is arranged, not attrition resistant problem though solved high-chromium casting damaged breakage problem and foundry goods under powerful surging force; Solve the conflicting problem of toughness and hardness, saved resource simultaneously, reduce cost, improved the performance of product, belonged to environmental protection row material.

For achieving the above object, the present invention takes following design:

The production of this abrasion resistance of metal material-ZG35CrMnSiBRe, it comprises following heat treatment process:

(1), annealing: rise to 650 ℃ with 50 ℃/h rate of heating, be incubated after 1 hour, direct heating to 930 ℃ be incubated 2-4 hour (according to the foundry goods thickness, 30MM is a radix, and every increase 10MM thickness just prolongation is incubated 1 hour); Stop heating then, when treating that furnace temperature is reduced to 600 ℃, be incubated 30 minutes,,, eliminate casting stress to prevent component segregation with the foundry goods air cooling;

(2), quench: the foundry goods direct heating to 950 after will annealing ℃, be incubated 2-3 hour, all foundry goods entry in 10 seconds then, to make simultaneously foundry goods in water about, about do not stop to move, and make water temperature be no more than 50 ℃, according to casting thickness, calculate foundry goods cooling time in water 1 second in water by 1 mm thick, be not less than 200 ℃ after the foundry goods water outlet;

(3), tempering: after foundry goods takes out, must in 10 minutes, carry out tempering from water, eliminating quenching stress, 245 ℃ of tempering temperatures, tempering time 6-8 hour, air cooling then; Carry out the tempering second time after one week, 235 ℃ of tempering temperatures, tempering 5-6 hour, air cooling carried out tempering for the third time after the week more then, 235 ℃ of tempering temperatures, tempering 4-5 hour, air cooling then.

After above-mentioned quenching, drawing process, can solve the cracking problem of foundry goods, be organized as tiny lath martensite, hardness HRC 〉=52 after quenching, the tempering; 55 * 10 * 10 non-notch coupon ballistic work J 〉=200.Has higher energy of dislocation through the foundry goods tissue after above-mentioned quenching, the drawing process, so have the surface impacts hardening characteristics.Through high energy impact events rear surface hardness HRC 〉=63, metallographic structure is the fine and close martensite of high dislocation, and hardness is higher than the surface hardness (high-chromium casting thermal treatment rear surface hardness HRC58-62) of high-chromium cast iron piece.The shock peening layer 1-2 millimeter that is produced, this hardened layer wear and tear under the effect of power, and the back is continuous regenerates.Because this toughness of products is fine, even wearing up to, foundry goods can not ftracture when very thin yet, thus the life-span of having improved product.And cost has only high-chromium casting half, and various alloy additions are low, belongs to the wear-resisting material of environment-friendly type.

Traditional wear-resistant material ZGMn13 surface impacts sclerosis back hardness is HRC45-50, the cost height, wear no resistance, and amount of plastic deformation is too big.

The composition range of this material: C0.25-0.42%, Cr0.8-3%, Si0.8-1.6%, Mn0.8-1.6%, Re0.1-0.15%, B0.001-0.005%.

The thermal treatment process that is adopted be shrend, pollution-free, cost is low, need not to add any medium, carry out desulfurization phosphorus (S, P≤0.02%) by special melting technology, and in molten steel, add the hardening capacity that trace B, rare earth element improve foundry goods, the as-cast structure structure of refinement foundry goods is removed obnoxious flavoures such as H, O.

Advantage of the present invention is: the foundry goods (ZG35CrMnSiBRe) through this explained hereafter has the impelling strength of ZG35 and the hardness and the wear resistance of rich chromium cast iron; The toughness that satisfies operating mode is arranged, not attrition resistant problem though solved high-chromium casting damaged breakage problem and foundry goods under powerful surging force; Solve the conflicting problem of toughness and hardness, saved resource simultaneously, reduce cost, improved the performance of product.

Embodiment

Embodiment 1:

The production technique of a kind of ferrous metal wear-resistant material-ZG35CrMnSiBRe, it comprises following heat treatment process:

(1), annealing:, rise to 650 ℃ with 50 ℃/h rate of heating, be incubated after 1 hour, direct heating to 930 ℃ is incubated 2 hours (casting thickness 30mm); Stop heating then, when treating that furnace temperature is reduced to 600 ℃, be incubated air cooling after 30 minutes,, eliminate casting stress to prevent component segregation;

(2), quench: the foundry goods direct heating to 950 after will annealing ℃, be incubated 2 hours, all foundry goods entry in 10 seconds then, to make simultaneously foundry goods in water about, about do not stop to move, and water will flow, water temperature is no more than 50 ℃, according to casting thickness, calculate foundry goods cooling time in water 1 second in water by 1 mm thick, during casting thickness 30mm, foundry goods cooling time in water is 30 seconds, is not less than 200 ℃ after the foundry goods water outlet;

(3), tempering: after foundry goods takes out, must in 10 minutes, carry out tempering from water, to eliminate quenching stress, 245 ℃ of tempering temperatures, tempering time 6 hours, air cooling then; Carry out the tempering second time after one week, 200 ℃ of tempering temperatures, tempering 5 hours, air cooling carries out tempering for the third time after the week more then, 200 ℃ of tempering temperatures, tempering 4 hours, air cooling then.

Embodiment 2:

(1), annealing: foundry goods is risen to 650 ℃ with 50 ℃/h rate of heating, be incubated after 1 hour, direct heating to 930 ℃ is incubated 3 hours (casting thickness 40mm) again; Stop heating then, when treating that furnace temperature is reduced to 600 ℃, be incubated 30 minutes,,, eliminate casting stress to prevent component segregation with the foundry goods air cooling;

(2), quench: the foundry goods direct heating to 950 after will annealing ℃, be incubated 2 hours 30 minutes, all foundry goods entry in 10 seconds then, to make simultaneously foundry goods in water about, about do not stop to move, and water will flow, water temperature is no more than 50 ℃, according to casting thickness, calculate foundry goods cooling time in water 1 second in water by 1 mm thick, during casting thickness 40mm, foundry goods cooling time in water is 40 seconds, is not less than 200 ℃ after the foundry goods water outlet;

(3), tempering: foundry goods must be gone into the stove tempering after taking out in 10 minutes, to eliminate quenching stress, 245 ℃ of tempering temperatures, tempering time 7 hours, air cooling then; One all fed to boiler carry out the tempering second time, 235 ℃ of tempering temperatures, and tempering 5 hours 30 minutes, air cooling carries out tempering for the third time after the week more then, 235 ℃ of tempering temperatures, tempering 4 hours 30 minutes, air cooling then.

Embodiment 3:

(1), annealing: foundry goods is risen to 650 ℃ with 50 ℃/h rate of heating, be incubated after 1 hour, direct heating to 930 ℃ is incubated 4 hours (casting thickness 50mm); Stop heating then, when treating that furnace temperature is reduced to 600 ℃, be incubated 30 minutes,,, eliminate casting stress to prevent component segregation with the foundry goods air cooling;

(2), quench: the foundry goods direct heating to 950 after will annealing ℃, be incubated 3 hours, all foundry goods entry in 10 seconds then, to make simultaneously foundry goods in water about, about do not stop to move, and water will flow, water temperature is no more than 50 ℃, according to casting thickness, calculate foundry goods cooling time in water 1 second in water by 1 mm thick, during casting thickness 50mm, foundry goods cooling time in water is 50 seconds, is not less than 200 ℃ after the foundry goods water outlet;

(3), tempering: after foundry goods takes out, must in 10 minutes, carry out tempering from water, to eliminate quenching stress, 245 ℃ of tempering temperatures, tempering time 8 hours, air cooling then; Carry out the tempering second time after one week, 235 ℃ of tempering temperatures, tempering 6 hours, air cooling carries out tempering for the third time after the week more then, 235 ℃ of tempering temperatures, tempering 5 hours, air cooling then.

Have hardness and flexible best of breed through the ZG35CrMnSiBRe of above-mentioned explained hereafter foundry goods, make the liner plate of the large-size ball mill that uses in the cement mill, after substituting the ZGMn13 liner plate, be 1.8-2 times of ZGMn13 liner plate work-ing life, through on some large-size ball mills, using, obtaining obvious effects, is the best substitute products of ZGMn13 liner plate.

Claims

1, the treatment production technology of a kind of ferrous metal wear-resistant material-ZG35CrMnSiBRe, it comprises following heat treatment process:

(1), annealing: foundry goods is risen to 650 ℃ with 50 ℃/h rate of heating, be incubated after 1 hour, direct heating to 930 ℃ is incubated 2-4 hour; Stop heating then, when treating that furnace temperature is reduced to 600 ℃, be incubated 30 minutes,,, eliminate casting stress to prevent component segregation with the foundry goods air cooling;

(2), quench: the foundry goods direct heating to 950 after will annealing ℃, be incubated 2-3 hour, all foundry goods entry in 10 seconds then, to make simultaneously foundry goods in water about, about do not stop to move, and water will flow, and water temperature is no more than 50 ℃, according to casting thickness, calculate foundry goods cooling time in water 1 second in water by 1 mm thick, be not less than 200 ℃ after the foundry goods water outlet;

(3), tempering: after foundry goods is pulled out, must in 10 minutes, carry out tempering from water, eliminating quenching stress, 245 ℃ of tempering temperatures, tempering time 6-8 hour, air cooling then; One all fed to boiler carry out the tempering second time, 235 ℃ of tempering temperatures, and tempering 5-6 hour, air cooling carried out tempering for the third time after the week more then, 235 ℃ of tempering temperatures, tempering 4-5 hour, air cooling then.