CN103028730A - Powder metallurgy preparation method of valve clack of membrane valve - Google Patents
Powder metallurgy preparation method of valve clack of membrane valve Download PDFInfo
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- CN103028730A CN103028730A CN2012104122136A CN201210412213A CN103028730A CN 103028730 A CN103028730 A CN 103028730A CN 2012104122136 A CN2012104122136 A CN 2012104122136A CN 201210412213 A CN201210412213 A CN 201210412213A CN 103028730 A CN103028730 A CN 103028730A
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Abstract
The invention discloses a powder metallurgy preparation method of a valve clack of a membrane valve. The preparation method comprises the following steps that iron-based mixed powder is prepared so that the iron-based mixed powder comprises the following ingredients in percentage by mass: 0.5 to 1.2 percent of Mo, 0.1 to 0.25 percent of Mn as prealloy and the balance of iron and impurities, in addition, 0.6 to 4.2 percent of Al powder, 0.6 to 1.2 percent of Cu powder, 0.5 to 1.5 percent of Ni powder, 0.5 to 1.2 percent of graphite powder and 0.21 to 4.9 percent of polyamide wax flake powder are added into the iron-based mixed powder, the average grain diameter of the long diameter of the polyamide wax flake powder is less than 200mum, the thickness is less than 30mum, and valve plate workpieces are obtained through pressing and sintering. The powder metallurgy preparation method has the advantages that the manufacture process has higher production continuity, in addition, the material utilization rate is high, the preparation method is suitable for mass production, and the cost is reduced.
Description
Technical field
The present invention relates to a kind of preparation method of diaphragm valve, specifically belong to a kind of method for preparing powder metallurgy of diaphragm valve flap.
Background technology
The work valve block of banked direction control valves disposes in groups, and the built-in three-way pressure compensating vent relief valve of inlet valve piece (logic element, when the banked direction control valves shut-down operation, and each valve is all when meta, and this valve is then with compensatory pressure (6-12BAR) bypass working connection flow.When a certain valve work, this valve by-pass port under the load pressure effect reduces, and provides required flow according to load pressure.At present, preparation banked direction control valves industry, domestic banked direction control valves valve block all adopts common high-speed steel material, or the stainless steel material is by machined banked direction control valves valve block.Compare with powder metallurgy banked direction control valves valve block, the banked direction control valves valve block process velocity that common high-speed steel material or the machined of stainless steel material are made is slower, stock utilization is not high, and powder metallurgical technique is made stop valve, not only stock utilization is high, and be suitable for producing in enormous quantities, before assembling is used, need the powder metallurgy valve block is carried out a small amount of fine grinding.
At present, the process velocity of banked direction control valves is slower, and stock utilization is not high, and manufacturing cost is high.
Summary of the invention
Technical problem to be solved by this invention is for diaphragm valve technology present situation, and the method for preparing powder metallurgy of a kind of diaphragm valve flap that a kind of production efficiency is high, manufacturing cost is lower that provides.
The technical solution used in the present invention is as follows:
A kind of method for preparing powder metallurgy of banked direction control valves valve block includes following steps:
A, configuration iron base powder mixture end, make it contain the composition of following mass percent, contain Mo:0.5～1.2% and Mn:0.1～0.25% as prealloy, surplus is iron and impurity, and in this iron base powder mixture end, add 0.6～4.2% Al powder, 0.6～1.2% Cu powder, 0.5～1.5% Ni powder, 0.5 the polyamide wax flakelike powder of～1.2% graphite powder and 0.21～4.9%, the average grain diameter of the major diameter of this polyamide wax flakelike powder is below the 200 μ m, and thickness is below the 30 μ m; Obtain the valve block workpiece through compacting, sinter molding again;
B, sinter molding is obtained valve block workpiece water atomizing steam process, the processing time is 3-4 hour, and temperature is 550-650 ℃;
C, heat treatment: carry out first normalized treatment, the valve block after the steam treatment 865-875 ℃ of lower insulation about 1-2 hour, is carried out Quenching Treatment again after the taking-up: send into and be heated to 840-880 ℃ in the heat-treatment furnace, and be incubated 2-3 hour; Then, with the quenching oil cooling, carry out at last temper: the part after will quenching is sent into and is heated to 350-450 ℃ in the tempering furnace, insulation 50-70min; The rate of heat addition with 55-65 ℃/h is heated to 550 ~ 650 ℃ of insulation 0.5-1.5h again, and the rate of heat addition with 100-120 ℃/h is heated to 630-670 ℃ of insulation 2-4h again, cools to the furnace below 350 ℃ and comes out of the stove air cooling to room temperature;
D, phosphatization are processed, under 100-150 ℃, adopting pH value is that 8 surface conditioner is processed 1min to the banked direction control valves valve block, after dripping empty 1-2min, adopt again bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min workpiece is placed 78-100 ℃ hot water.
After processing through phosphatization, carry out at last subzero treatment: the part container of packing into after phosphatization is processed, add liquid nitrogen and carry out subzero treatment, the time is 11 hours, obtains at last banked direction control valves valve block finished product.
Compared with prior art, the invention has the advantages that:
Composition of raw materials of the present invention is reasonable, and technique is simple, and alloy has high temperature hardness and the high temperature compressed intensity of improvement, is fit to be applied to the valve that the high temperature occasion is made, the long service life of valve, and qualification rate is high, has greatly improved the quality of product, is fit to extensively promote.
The specific embodiment
A kind of method for preparing powder metallurgy of banked direction control valves valve block includes following steps:
A, configuration iron base powder mixture end, make it contain the composition of following mass percent, contain Mo:0.5～1.2% and Mn:0.1～0.25% as prealloy, surplus is iron and impurity, and in this iron base powder mixture end, add 0.6～4.2% Al powder, 0.6～1.2% Cu powder, 0.5～1.5% Ni powder, 0.5 the polyamide wax flakelike powder of～1.2% graphite powder and 0.21～4.9%, the average grain diameter of the major diameter of this polyamide wax flakelike powder is below the 200 μ m, and thickness is below the 30 μ m; Obtain the valve block workpiece through compacting, sinter molding again;
B, sinter molding is obtained valve block workpiece water atomizing steam process, the processing time is 3-4 hour, and temperature is 550-650 ℃;
C, heat treatment: carry out first normalized treatment, the valve block after the steam treatment 865-875 ℃ of lower insulation about 1-2 hour, is carried out Quenching Treatment again after the taking-up: send into and be heated to 840-880 ℃ in the heat-treatment furnace, and be incubated 2-3 hour; Then, with the quenching oil cooling, carry out at last temper: the part after will quenching is sent into and is heated to 350-450 ℃ in the tempering furnace, insulation 50-70min; The rate of heat addition with 55-65 ℃/h is heated to 550 ~ 650 ℃ of insulation 0.5-1.5h again, and the rate of heat addition with 100-120 ℃/h is heated to 630-670 ℃ of insulation 2-4h again, cools to the furnace below 350 ℃ and comes out of the stove air cooling to room temperature;
D, phosphatization are processed, under 100-150 ℃, adopting pH value is that 8 surface conditioner is processed 1min to the banked direction control valves valve block, after dripping empty 1-2min, adopt again bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min workpiece is placed 78-100 ℃ hot water.
E, process through phosphatization after, carry out at last subzero treatment: the part container of packing into after phosphatization is processed, add liquid nitrogen and carry out subzero treatment, the time is 11 hours, obtains at last banked direction control valves valve block finished product.
It is as follows that mechanics of the present invention detects performance:
Tensile strength sigma b (MPa): 〉=680
Yield strength σ s (MPa): 〉=610
Percentage elongation δ 5 (%): 〉=12.6
Contraction percentage of area ψ (%): 〉=45.2.
Claims (2)
1. the method for preparing powder metallurgy of a banked direction control valves valve block is characterized in that including following steps:
A, configuration iron base powder mixture end, make it contain the composition of following mass percent, contain Mo:0.5～1.2% and Mn:0.1～0.25% as prealloy, surplus is iron and impurity, and in this iron base powder mixture end, add 0.6～4.2% Al powder, 0.6～1.2% Cu powder, 0.5～1.5% Ni powder, 0.5 the polyamide wax flakelike powder of～1.2% graphite powder and 0.21～4.9%, the average grain diameter of the major diameter of this polyamide wax flakelike powder is below the 200 μ m, and thickness is below the 30 μ m; Obtain the valve block workpiece through compacting, sinter molding again;
B, sinter molding is obtained valve block workpiece water atomizing steam process, the processing time is 3-4 hour, and temperature is 550-650 ℃;
C, heat treatment: carry out first normalized treatment, the valve block after the steam treatment 865-875 ℃ of lower insulation about 1-2 hour, is carried out Quenching Treatment again after the taking-up: send into and be heated to 840-880 ℃ in the heat-treatment furnace, and be incubated 2-3 hour; Then, with the quenching oil cooling, carry out at last temper: the part after will quenching is sent into and is heated to 350-450 ℃ in the tempering furnace, insulation 50-70min; The rate of heat addition with 55-65 ℃/h is heated to 550 ~ 650 ℃ of insulation 0.5-1.5h again, and the rate of heat addition with 100-120 ℃/h is heated to 630-670 ℃ of insulation 2-4h again, cools to the furnace below 350 ℃ and comes out of the stove air cooling to room temperature;
D, phosphatization are processed, under 100-150 ℃, adopting pH value is that 8 surface conditioner is processed 1min to the banked direction control valves valve block, after dripping empty 1-2min, adopt again bonderite to process 15-20min, after dripping empty 1-2min, adopt clear water to clean 1-2min again, after dripping again empty 1-2min, process 0.5-1min workpiece is placed 78-100 ℃ hot water.
2. the method for preparing powder metallurgy of banked direction control valves valve block according to claim 1, it is characterized in that: after processing through phosphatization, carry out at last subzero treatment: the part container of packing into after phosphatization is processed adds liquid nitrogen and carries out subzero treatment, time is 11 hours, obtains at last banked direction control valves valve block finished product.
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| CN103600074A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy abrasion-resistant alloy and manufacturing method thereof |
| CN103600076A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgical automotive power steering pump stator and manufacture method thereof |
| CN103600073A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy chain wheel and manufacturing method thereof |
| CN103600075A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgical cobalt-free iron-base alloy and manufacture method thereof |
| CN103600081A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgical refrigeration compressor valve plate and manufacture method thereof |
| CN104028765A (en) * | 2014-06-27 | 2014-09-10 | 张家港振江粉末冶金制品有限公司 | Powder metallurgy component and production method of powder metallurgy component with through hole |
| CN104550921A (en) * | 2014-12-25 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Iron-based powder metallurgy valve material and preparation method thereof |
| CN105983702A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine connecting rod |
| CN105983699A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift shock absorber piston rod |
| CN105983692A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团振邺机械有限公司 | Powder forging method for forklift water pump shell |
| CN105983691A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团振邺机械有限公司 | Powder forging method for forklift synchronizer gear ring |
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| CN103600081B (en) * | 2013-10-10 | 2016-05-04 | 铜陵新创流体科技有限公司 | A kind of powder-metallurgy refrigeration compressor valve sheet and preparation method thereof |
| CN103600076A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgical automotive power steering pump stator and manufacture method thereof |
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| CN103600075A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgical cobalt-free iron-base alloy and manufacture method thereof |
| CN103600081A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgical refrigeration compressor valve plate and manufacture method thereof |
| CN103600074A (en) * | 2013-10-10 | 2014-02-26 | 铜陵新创流体科技有限公司 | Powder metallurgy abrasion-resistant alloy and manufacturing method thereof |
| CN103600075B (en) * | 2013-10-10 | 2016-06-29 | 铜陵新创流体科技有限公司 | A kind of no-co ferrous Alloy And Preparation Method of powder metallurgy |
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| CN104028765A (en) * | 2014-06-27 | 2014-09-10 | 张家港振江粉末冶金制品有限公司 | Powder metallurgy component and production method of powder metallurgy component with through hole |
| CN104028765B (en) * | 2014-06-27 | 2016-01-20 | 张家港振江粉末冶金制品有限公司 | A kind of production method of the metallic sintered products with installation through hole |
| CN104550921A (en) * | 2014-12-25 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Iron-based powder metallurgy valve material and preparation method thereof |
| CN105983702A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团精密液压件有限责任公司 | Powder forging method for forklift engine connecting rod |
| CN105983699A (en) * | 2016-01-19 | 2016-10-05 | 安徽蓝博旺机械集团液压流体机械有限责任公司 | Powder forging method for forklift shock absorber piston rod |
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| CN109454238A (en) * | 2018-11-08 | 2019-03-12 | 江苏精研科技股份有限公司 | A method of engine oil pressure control valve valve pocket is prepared by injection moulding |
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