CN1421539A - Production process of extruder pressure booster with wall board of antiwear cast iron alloy - Google Patents
Production process of extruder pressure booster with wall board of antiwear cast iron alloy Download PDFInfo
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- CN1421539A CN1421539A CN 01139754 CN01139754A CN1421539A CN 1421539 A CN1421539 A CN 1421539A CN 01139754 CN01139754 CN 01139754 CN 01139754 A CN01139754 A CN 01139754A CN 1421539 A CN1421539 A CN 1421539A
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Abstract
The present invention provides the production process of extruder pressure booster with wall board of antiwear cast iron alloy. The production process includes casting process and heat treatment process. The present invention features the V-containing antiwear cast iron alloy comprising C 1.80-2.60 wt% Cr 12.0-20.0 wt%, Mo 1.0-2.5 wt%, V 0.2-1.2 wt%, Ni less than 2.5 wt%, Cu less than 1.5 wt%, Mn less than 0.8 wt%, Si less than 0.8 wt% and RE 0.01-0.03 wt% besides Fe. The antiwear cast iron alloy has high wear resistance, high toughness, less deformation and cracking tendency in heat treatment and long service life and is used in extruder pressure booster and other antiwear parts.
Description
The invention provides a kind of casting process and thermal treatment process of extruder pressure booster with wall board.
With correlation technique of the present invention the outer field chromium manganese of the compound wear resistant double-rolle roller rim molybdenum cast iron of China patent No. ZL94 1 009424 is arranged, its composition (%) is: C 1.8～2.6, Cr 11.0～14.5, Mn 0.6～2.8, Mo 1.0～1.9, Cu 0.9～1.5, V 0.08～0.20, RE 0.01～0.02.Britain BS, 4844:Part3:1975 wear resistant white iron rank 3A, its composition (%) is: C 2.4～3.0, Cr 14～17, Mo 0～2.5, Ni 0～1.0, Mn 0.5～1.5, Cu 0～1.2.
The extruder pressure booster with wall board product of domestic present use has two kinds, and first kind is medium high carbon low alloy steel, and second kind is wall liner carburizing treatment pipe in the medium carbon low alloy steel material guiding pipe, and the two wears no resistance, and work-ing life is short, and the former produces only 700 meters of wallboards
2, only 1000 meters of the latter
2Promptly scrap, wallboard manufacture can not be kept continuously and carry out, the wallboard difficult quality guarantee.
The object of the present invention is to provide a kind of have high-wearing feature, good-toughness, the heat treatment deformation tearing tendency is little, high life, the production technique of the extruder pressure booster with wall board of ratio of performance to price excellence.
Of the present invention constituting:
1. adopt antiwear cast iron alloy as the extruder pressure booster with wall board material, it contains higher content of vanadium, but the refining eutectic carbide improves the hardness of carbide, thereby improves the wear resistance and the toughness of cast alloy iron, nickel can improve toughness, strain cracking tendency when reducing supercharging blower thermal treatment, the compound action of nickel, chromium, molybdenum, copper, the organizational controls when making thermal treatment is more reliable, can reduce the internal stress of complicated shape greatly, and improve the comprehensive mechanical property of product.The chemical ingredients of antiwear cast iron alloy (%) is: C 1.80～2.60, Cr12.0～20.0, Mo 1.0～2.5, V 0.2～1.2, Ni≤2.5, Cu≤1.5, Mn≤0.8, Si≤0.8, RE 0.01～0.03, surplus is Fe.
2. adopt electric arc furnace or induction furnace melting antiwear cast iron alloy, adopt vacuum-evaporative pattern casting, precision casting or sand casting process to make extruder pressure booster with wall board, open that the mould temperature is 200～300 ℃ when watering, antiwear cast iron alloy is opened and watered temperature is 1400～1500 ℃, has watered back foundry goods slow cooling.
3. adopt hot charging furnace annealing and the burning hot treatment process of quenching add-back.Finish slow cooling to 400 ℃ of casting, the supercharging blower foundry goods is sent into annealing furnace together with mold and is annealed, 70 ℃/h of control rate of heating, rate of heating is no more than 120 ℃/h more than 600 ℃, 880～980 ℃ of insulations 3.5～6 hours, stove was chilled to 720～650 ℃ of insulations 4～12 hours, and stove is chilled to room temperature.
Supercharging blower is warmed up to 920～980 ℃ of insulations 2～6 hours with stove in the rearmounted special atmosphere oven of machining, quench 40～100 ℃/min of controlled chilling speed by taking out in the stove; be cooled to below 600 ℃; controlled chilling speed is cooled to be lower than 60 ℃ with 10～20 ℃/h again, and quenching finishes.Carry out tempering then immediately, be heated to 2～4 hours stoves of 500～590 ℃ of insulations with stove and be as cold as and be lower than 60 ℃ and come out of the stove.
The invention has the advantages that:
1. solve the work-ing life of extruder pressure booster with wall board, guaranteed the continuous production of wallboard forcing machine and the high quality of wallboard.
2. optimize the chemical ingredients of antiwear cast iron alloy, solved the wear resistance of supercharging blower and the contradiction between the high-strong toughness.
3. thermal treatment process is easy to control, the strain cracking of supercharging blower tendency when greatly reducing thermal treatment, and booster performance quality stability is good after the thermal treatment, and hardness is at HRC 54～58, and wear resistance is good, and the anti-vibration ability is strong.Be medium high carbon low alloy steel supercharging blower and the interior pipe of liner carburizing thermal treatment 20 times and 15 times its work-ing life, reaches 15000 meters
2More than.Having solved extruder pressure booster with wall board can not a quantity-produced difficult problem.
4. the wallboard forcing machine uses antiwear cast iron alloy supercharging blower of the present invention; guaranteed to produce and normally to have carried out, significantly reduced shutdown maintenance number of times and short chi plate waste product, improved the quality of wallboard; improve workshop appliance utilization ratio and labour productivity, reduced production cost.
Embodiment
Finished product supercharging blower model is the supercharging blower of 90mm wallboard forcing machine.
Antiwear cast iron alloy composition (%): C 2.41, Cr 16.1, Mo 1.64, V 0.56, Ni 0.88, Cu0.42, Mn 0.54, Si 0.72, RE 0.015, surplus is Fe.1462 ℃ of antiwear cast iron alloy cast degree, 240 ℃ of mould temperature are watered back slow cooling to 400 ℃, then anneal.920 ℃ of insulations of annealing temperature slow cooling to 700 in 6 hours ℃ 5 hours stoves of insulation are cold.Quench after the machining, be heated to 940 ℃ of insulations 3 hours in protective atmosphere, by take out quenching in the stove, 80 ℃/min of controlled chilling speed is cooled to 600 ℃ and controls with 20 ℃/h again and be as cold as room temperature, and quenching finishes.Carry out tempering then immediately, 580 ℃ of insulations of tempering temperature 3 hours, stove is as cold as below 100 ℃ and comes out of the stove.Hardness HRC 54.
Claims (2)
1. extruder pressure booster with wall board of antiwear cast iron alloy, it is characterized in that supercharging blower is an antiwear cast iron alloy, composition (%) is: C 1.80～2.50, Cr 12.0～20.0, Mo 1.0～2.5, V 0.2～1.2, Ni≤2.5, Cu≤1.5, Mn≤0.8, Si≤0.8, RE 0.01～0.03, surplus is Fe.
2. a wall board of antiwear cast iron alloy forcing machine supercharge production technique is made up of casting process and thermal treatment process, it is characterized in that:
A. casting process: with electric arc furnace or induction furnace melting antiwear cast iron alloy.Adopt vacuum-evaporative pattern casting, precision casting or sand casting process, open that the mould temperature is 200～300 ℃ when watering, antiwear cast iron alloy is opened and watered temperature is 1400～1500 ℃, has watered foundry goods slow cooling afterwards.
B. thermal treatment process:
The supercharging blower foundry goods waters the slow cooling to 400 ℃ of finishing, and anneals, and the control rate of heating is no more than 70 ℃/h, rate of heating is no more than 120 ℃/h more than 600 ℃, 880～980 ℃ of insulations 3.5～6 hours, stove was chilled to 720～650 ℃ of insulations 4～12 hours, and stove is chilled to room temperature.
Supercharging blower is warmed up to 920～980 ℃ of insulations 2～6 hours with stove in the rearmounted special atmosphere oven of machining; quench by taking out in the stove, 40～100 ℃/min of controlled chilling speed is cooled to below 600 ℃; controlled chilling speed is cooled to be lower than 60 ℃ with 10～20 ℃/h again, and quenching finishes.Carry out tempering then immediately, be heated to 500～590 ℃ of insulations 2～4 hours with stove, stove is as cold as and is lower than 100 ℃ and comes out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01139754 CN1247808C (en) | 2001-11-30 | 2001-11-30 | Production process of extruder pressure booster with wall board of antiwear cast iron alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01139754 CN1247808C (en) | 2001-11-30 | 2001-11-30 | Production process of extruder pressure booster with wall board of antiwear cast iron alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1421539A true CN1421539A (en) | 2003-06-04 |
| CN1247808C CN1247808C (en) | 2006-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01139754 Expired - Fee Related CN1247808C (en) | 2001-11-30 | 2001-11-30 | Production process of extruder pressure booster with wall board of antiwear cast iron alloy |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453674C (en) * | 2005-11-10 | 2009-01-21 | 西安交通大学 | Low cost, high-wearability hypereutectic high chromium cast iron and its production method |
| CN109014044A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
| CN109014045A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
| CN109014053A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
-
2001
- 2001-11-30 CN CN 01139754 patent/CN1247808C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100453674C (en) * | 2005-11-10 | 2009-01-21 | 西安交通大学 | Low cost, high-wearability hypereutectic high chromium cast iron and its production method |
| CN109014044A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
| CN109014045A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
| CN109014053A (en) * | 2018-08-01 | 2018-12-18 | 安徽信息工程学院 | A kind of preparation method of rich chromium cast iron tup |
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| Publication number | Publication date |
|---|---|
| CN1247808C (en) | 2006-03-29 |
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Granted publication date: 20060329 Termination date: 20101130 |