CN100424219C

CN100424219C - Ultra-thin precision deep drawing molding rolling method for molybdenum sheet

Info

Publication number: CN100424219C
Application number: CNB2007100197984A
Authority: CN
Inventors: 俞保文; 俞智登
Original assignee: YIXING BAODENG ALLOY CO Ltd
Current assignee: YIXING BAODENG ALLOY CO Ltd
Priority date: 2007-02-07
Filing date: 2007-02-07
Publication date: 2008-10-08
Anticipated expiration: 2027-02-07
Also published as: CN101016608A

Abstract

The invention discloses a shaping molybdenum slice drawing method through ultra-thin accurate deep drawing, which comprises the following steps: twice-hot rolling molybdenum billet; twice-warm rolling; acid-cleaning; poaching; annealing to the needed thickness through twice cool-rolling; getting the product. This craft possesses simple operation and the yield can reach 90%, which can increase the yield of molybdenum slice shaping and decrease the cost of production.

Description

A kind of rolling method for molybdenum sheet of ultra-thin precision deep drawing molding

Technical field

The present invention relates to the molybdenum sheet rolling technology, refer in particular to common molybdenum base is rolled into the method that ultra-thin precision deep drawing becomes extraordinary molybdenum sheet.

Background technology

The specification of common molybdenum base is generally 145 * 60 * 12mm, be processed in the operation of rolling of slim molybdenum sheet, routine operation is generally to thickness, the control of temperature and calendering amount does not have very clear and definite Harmony, just adopt and simply heat, rolling, subtract thick technology, can cause the recrystallization temperature confusion like this, can make annealing temperature be difficult for determining and grasp, and, in these rolling technologys, rolling direction is single constant, can make grain propagation that certain directional property is arranged, will cause the serious more situation of thin more cracking phenomena like this, make material use efficiency low, more be difficult for deep drawing molding, plasticity is poor.

Summary of the invention

The present invention is just in order to overcome above-mentioned deficiency, a kind of rolling method for molybdenum sheet of ultra-thin precision deep drawing molding is provided, this technological operation is easy, production cost is low and yield rate is high, main innovation is to adopt the secondary hot rolling, the secondary warm-rolling is time cold rolled annealed extremely needed thickness repeatedly, specifically implement like this: a kind of rolling method for molybdenum sheet of ultra-thin precision deep drawing molding, it is characterized in that the molybdenum base is through the secondary hot rolling, the secondary warm-rolling, after pickling and the rinsing, cold rolled annealed through three times again to desired thickness, described secondary hot rolling is: with the molybdenum base in 1280 ℃ of-1330 ℃ of following heat tracing 60-75 minutes, the hot rolling for the first time of last milling train, with 1180 ℃ of-1230 ℃ of following heat tracing 60-75 of molybdenum semifinished product minutes, last milling train carried out the hot rolling second time again; Described secondary warm-rolling is: with the molybdenum base after the secondary hot rolling in 1080 ℃ of-1130 ℃ of following heat tracing 60-75 minutes, last milling train is warm-rolling for the first time, sheared behind the piecemeal again the molybdenum base in 980 ℃ of-1030 ℃ of following heat tracing 60-75 minutes, conversion rolling direction is the warm-rolling direction half-twist first time, and last milling train carries out the warm-rolling second time; Cold rolled annealedly be for described three times: the molybdenum sheet after pickling, the rinsing in 300-400 ℃ down insulation to carry out the first time in 20-30 minute cold rolling, after drying up, cleaning makes anneal, annealing temperature is 850-870 ℃, annealing time is 60-70 minute, be 100-120 minute cooling time, it is cold rolling, cold rolling for the third time that biconditional operation carries out the second time successively, holding temperature before for the second time cold rolling is 250 ℃-300 ℃, annealing temperature is 840-860 ℃, the cold rolling for the third time processing direct cold rolling that is not incubated, annealing temperature is 830-850 ℃, and all the other parameters are with for the first time cold rolling.

This technology is behind first time warm-rolling, and molybdenum sheet length is long, and is rolling in order descend the road better, is fit to the rolling calendering amount in following road, has carried out shearing treatment.In the technology for the second time the direction during warm-rolling must with the direction half-twist of the warm-rolling first time, purpose is to make its crystal grain produce multi-direction fibrous metallographic structure, and better accurate deep-draw tensile property is arranged.

Before before the secondary cold-rolling, this technology has all been carried out insulation to molybdenum sheet and has been handled, mainly be this moment molybdenum sheet thickness comparatively speaking or bigger, in order to make rolling product surface light, inherent crystal grain does not go to pot, and is provided with the insulation operation in the specified temp zone.

After the molybdenum sheet of the secondary warm-rolling cooling, carry out pickling and rinsing in this technology, it is that mixed solution with hydrochloric acid, water, nitric acid carries out pickling, and the time is 5-30 minute, after the clear water scouring, uses hydrogen peroxide, ammoniacal liquor rinsing 0.5-1 minute again, and flushing with clean water is cleaned.

When carrying out the molybdenum sheet processing by above-mentioned steps, each molybdenum sheet thickness of going up mill milling control can be determined according to the thickness of used molybdenum base, for with the thick molybdenum base raw material of 12mm, secondary hot rolling, secondary warm-rolling, three cold rolling rolling thicknesses preferably of control respectively are respectively: 4-5mm, 2-2.5mm, 1-1.1mm, 0.7-0.8mm, 0.4-0.45mm, 0.2-0.3mm, 0.14-0.16mm.

For with 16mm and the thick molybdenum base raw material of 20mm, the molybdenum base that three cold rolling gauge control and 12mm are thick is handled consistent, the molybdenum base raw material that 16mm is thick, the better rolling thickness that secondary hot rolling, secondary warm-rolling are controlled respectively is: 7-8mm, 3-4mm, 1-1.5mm, 0.7-0.8mm; The molybdenum base raw material that 20mm is thick, the better rolling thickness that secondary hot rolling, secondary warm-rolling are controlled respectively is: 8-9mm, 4-5mm, 1.5-2mm, 0.7-0.8mm.

By the molybdenum sheet of this explained hereafter, the expansion of crystal grain pressurized is good, is easy to accurate deep-draw and stretches, this technological operation is simple, and yield rate is up to 90%, and deep-draw stretching yield rate is up to 60%, significantly improve the yield rate of molybdenum sheet moulding, obviously reduced the production cost of moulding molybdenum sheet.

Embodiment

Embodiment 1, and a kind of rolling method for molybdenum sheet of ultra-thin precision deep drawing molding, molybdenum base are after secondary hot rolling, secondary warm-rolling, pickling and rinsing, and be cold rolled annealed to desired thickness through three times again.Make raw material with the molybdenum base that 12mm is thick, step is:

The secondary hot rolling: in 1280 ℃ of-1330 ℃ of following heat tracing 60-75 minutes, last milling train was hot-rolled down to thickness 4-5mm for the first time with the molybdenum base, again with the molybdenum base in 1180 ℃ of-1230 ℃ of following heat tracing 60-75 minutes, it is 2-2.5mm that last milling train carries out being hot-rolled down to the second time thickness;

The secondary warm-rolling: with the molybdenum base after the secondary hot rolling in 1080 ℃ of-1130 ℃ of following heat tracing 60-75 minutes, the last milling train warm-rolling first time is to thickness 1-1.1mm, sheared behind the piecemeal again the molybdenum base in 980 ℃ of-1030 ℃ of following heat tracing 60-75 minutes, conversion rolling direction for the first time i.e. warm-rolling direction half-twist, and last milling train carries out second time warm-rolling to thickness 0.7-0.8mm;

Pickling and rinsing: carry out pickling with the mixed solution of hydrochloric acid, water, the nitric acid molybdenum sheet after to warm-rolling, the time is 5-30 minute, after cleaning with clear water, uses hydrogen peroxide, ammoniacal liquor rinsing 0.5-1 minute again, and flushing with clean water is cleaned.

Three times cold rolled annealed: pickling, molybdenum sheet after the rinsing is incubated 20-30 minute down in 300-400 ℃ and carries out being cold-rolled to the first time thickness 0.4-0.45mm, after drying up, cleaning makes anneal, annealing temperature is 850-870 ℃, annealing time is 60-70 minute, be 100-120 minute cooling time, it is cold rolling that biconditional operation carries out the second time successively, cold rolling for the third time, holding temperature before for the second time cold rolling is 250 ℃-300 ℃, the molybdenum sheet thickness of control is 0.2-0.3mm, annealing temperature is 840-860 ℃, the cold rolling for the third time processing direct cold rolling that is not incubated, and the molybdenum sheet thickness of control is 0.14-0.16mm, annealing temperature is 830-850 ℃, and all the other parameters are with for the first time cold rolling.

Embodiment 2, and the molybdenum base raw material thick with 16mm is rolled, and method is with embodiment 1, and the rolling thickness that secondary hot rolling, secondary warm-rolling are controlled respectively is: 7-8mm, 3-4mm, 1-1.5mm, 0.7-0.8mm.

Embodiment 3, and with the thick molybdenum base raw material of 20mm, method is with embodiment 1, and the rolling thickness that secondary hot rolling, secondary warm-rolling are controlled respectively is: 8-9mm, 4-5mm, 1.5-2mm, 0.7-0.8mm.

Claims

1. the rolling method for molybdenum sheet of a ultra-thin precision deep drawing molding, it is characterized in that the molybdenum base is after secondary hot rolling, secondary warm-rolling, pickling and rinsing, cold rolled annealed through three times again to desired thickness, described secondary hot rolling is: with the molybdenum base in 1280 ℃ of-1330 ℃ of following heat tracing 60-75 minutes, the hot rolling for the first time of last milling train, again with the molybdenum base in 1180 ℃ of-1230 ℃ of following heat tracing 60-75 minutes, last milling train carries out the hot rolling second time; Described secondary warm-rolling is: with the molybdenum base after the secondary hot rolling in 1080 ℃ of-1130 ℃ of following heat tracing 60-75 minutes, last milling train is warm-rolling for the first time, sheared behind the piecemeal again the molybdenum base in 980 ℃ of-1030 ℃ of following heat tracing 60-75 minutes, conversion rolling direction is the warm-rolling direction half-twist first time, and last milling train carries out the warm-rolling second time; Cold rolled annealedly be for described three times: the molybdenum sheet after pickling, the rinsing in 300-400 ℃ down insulation to carry out the first time in 20-30 minute cold rolling, after drying up, cleaning makes anneal, annealing temperature is 850-870 ℃, annealing time is 60-70 minute, be 100-120 minute cooling time, it is cold rolling, cold rolling for the third time that biconditional operation carries out the second time successively, holding temperature before for the second time cold rolling is 250 ℃-300 ℃, annealing temperature is 840-860 ℃, the cold rolling for the third time processing direct cold rolling that is not incubated, annealing temperature is 830-850 ℃, and all the other parameters are with for the first time cold rolling.

2. rolling method for molybdenum sheet according to claim 1, it is characterized in that pickling and rinsing are that mixed solution with hydrochloric acid, water, nitric acid carries out pickling, the time is 5-30 minute, after cleaning with clear water, use hydrogen peroxide, ammoniacal liquor rinsing 0.5-1 minute again, flushing with clean water is cleaned.

3. rolling method for molybdenum sheet according to claim 1, it is characterized in that making raw material with the thick molybdenum base of 12mm, secondary hot rolling, secondary warm-rolling, three cold rolling rolling thicknesses of control respectively are respectively: 4-5mm, 2-2.5mm, 1-1.1mm, 0.7-0.8mm, 0.4-0.45mm, 0.2-0.3mm, 0.14-0.16mm.

4. rolling method for molybdenum sheet according to claim 1 is characterized in that the molybdenum base raw material that 16mm is thick, and the rolling thickness that secondary hot rolling, secondary warm-rolling are controlled respectively is: 7-8mm, 3-4mm, 1-1.5mm, 0.7-0.8mm.

5. rolling method for molybdenum sheet according to claim 1 is characterized in that the molybdenum base raw material that 20mm is thick, and the rolling thickness that secondary hot rolling, secondary warm-rolling are controlled respectively is: 8-9mm, 4-5mm, 1.5-2mm, 0.7-0.8mm.