CN1345642A

CN1345642A - Technology for producing high manganese stee products

Info

Publication number: CN1345642A
Application number: CN 00112583
Authority: CN
Inventors: 汤国祥
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-29
Filing date: 2000-09-29
Publication date: 2002-04-24

Abstract

The present invention belongs to the field of heat treatment technology for smelting steel, and is characterized by that after the molten steel is poured and frozen by adopting metal muold, the as-cast waste heat can be used to make water toughening treatment. Said invention saves secondary heating procedure of casting, and can greatly reduce production cost and reduce labour intensity.

Description

Technology for producing high manganese stee products

The invention belongs to the smelting heat treatment technics field of steel.

Known to the applicant, potassium steel has been widely used in industrial and mining enterprises because good plasticity, toughness, impact resistance and wearability are arranged.The method of producing at present the potassium steel product be with molten steel through the sand mold cast, unpack, after the sand removal, foundry goods sent into heating furnace again, will expect that part is heated to 1050 ℃ of insulation certain hours, foundry goods is taken out place water to cool off (being the tough processing of water) again.There are following many shortcomings in this traditional technology: 1. the production cycle long, labour intensity is big, takes 5-6 days at least from being poured into finished product.2. the production cost height is an example with the ball grinding machine lining board, about the about 3500-4000 of per ton cost unit.3. quality is wayward, because the potassium steel heating-up temperature is unsuitable too high, otherwise crystal grain is thick, of poor quality.General heating-up temperature is got 1050 ℃, but because the interior temperature inequality of stove is descended water after the foundry goods that has is come out of the stove again, and temperature has been lower than 950 ℃, foundry goods is easy to crack.4. be unfavorable for that township enterprise produces.Traditional processing technology needs heating furnace, generally is gas-fired furnace or electric furnace.The former is concerning township enterprise, because of ventilating coal gas not obviously can not be realized.Dispose 2,000,000 yuan of need of gas generator.Just need ten thousand yuan of 15-20 with equipment of electric furnace, and power consumption is big, the cost height.

Introduced on the book that has and utilized the as cast condition waste heat to carry out the tough processing of water, technology is: foundry goods takes out in casting mold at 1100-1180 ℃, and after sand removal, foundry goods allows to be cooled to 900-1100 ℃, advance then stove be heated to 1050-1080 ℃ the insulation 3-5 hour after water-cooled.Also there is shortcoming in above-mentioned technology, as: 1100-1180 ℃ of foundry goods removing from mould, temperature are difficult for grasping; Secondly high temperature sand removal, the high temperature shove charge has increased labour intensity, so manufacturer does not generally adopt yet.

The objective of the invention is to utilize the as cast condition waste heat to carry out the tough processing of water, while method is simple, and is light and handy.

The present invention is design like this: adopt the metal pattern cast, metal pattern surface aluminising vanadine or the oven dry of Cab-O-sil coating (cast for the second time utilizes hot-die to dry automatically), molten steel is slowly poured into metal pattern, wait for the cast gate feeding, when beginning to solidify, unpack foundry goods is ploughed under in the water, utilize the as cast condition waste heat to carry out the tough processing of water.

Process characteristic of the present invention is: owing to adopt metal pattern, easily hold unpacking opportunity.The metal pattern surface radiating is fast, and foundry goods is at first finalized the design from surface solidification, and when beginning to solidify after the cast gate feeding, the foundry goods outside is coagulation forming.This at present the water casting temperature be far longer than 950 ℃, it is thin that foundry goods at high temperature obtains cooling off crystal grain, it is few that carbide is separated out.

Advantage of the present invention is: 1. greatly reduce labour intensity, shortened the production cycle, just can go out product in general one day.2. the product percent of pass height because coolant-temperature gage is far longer than 950 ℃ down, ftractures and can not take place, and crystal grain is thin simultaneously, and carbide is few.3. this technology is utilized the as cast condition waste heat fully, has saved the energy greatly, does not need firing equipment, as long as the producer that can make steel can both produce.4. owing to saved series of processes such as stone roller sand, moulding, mould drying, sand removal, heating, cost greatly reduces, and per tonly saves 1100 yuan, and economic benefit is considerable.

Be example with the ball mill barrel liner plate below, the production of new technology is described.

Fig. 1 is a ball mill barrel liner plate metal pattern mould assembly sketch drawing.

Fig. 2 is a ball mill barrel liner plate mo(u)ld bottom half schematic diagram.

Fig. 3 is a ball mill barrel liner plate mo(u)ld bottom half A-A cutaway view.

1. rising head sand overlaps 2. mo(u)ld top halves, 3. mo(u)ld bottom halves, 4. riser bases and overlaps 5. cores, 6 dowel holes, 7. air discharge ducts

Its operating process is: 1. aluminising vanadine coating in the upper and lower mould die cavity, dry by the fire then to 200-250 ℃.2. put core, the riser base cover is placed in mould assembling again.3. molten steel is calmed 1420-1380 ℃ and begin cast.4. wait molten steel feeding in the rising head sand cover, when solidifying, unpack immediately foundry goods ploughed under in the water and cool off.Potassium steel product with above-mentioned new technology is produced facts have proved reliable in quality through production practice over one year, and technological operation is simple.

Claims

1. technology for producing high manganese stee products, it is characterized in that adopting the metal pattern cast, metal pattern surface aluminising vanadine or Cab-O-sil coating, oven dry (cast for the second time utilizes hot-die to dry automatically), molten steel is slowly poured into metal pattern, wait for the cast gate feeding, when beginning to solidify, unpack foundry goods is ploughed under in the water, utilize the as cast condition waste heat to carry out the tough processing of water.