CN102817848B - Sliding plate of rotary compressor, and manufacturing method thereof - Google Patents

Abstract

The invention relates to a sliding plate of a rotary compressor, and a manufacturing method thereof. The sliding plate is a metal ceramic composite with Fe as a matrix and a ceramic material or alloy material as a dispersed phase. Components of the sliding plate are as follows, by weight, 0.2-1.0% of C, 1-8% of Ni, 1-13% of Mo, 1-12% of Cr, 5-30% of ceramic, 0.5-17% of Mn, 0-10% of Cu, and the balance being Fe and inevitable impurities. The sliding plate provided by the invention can meet the requirements of high hardness, high strength, high toughness and high size precision without heat treatment and nitriding treatment, thereby simplifying production process. The obtained sliding plate product has micro-voids which have the function of storing lubricating oil, can effectively reduce friction coefficient of the sliding plate, and even play a self-lubricating effect under a condition of lacking oil, so that operation reliability of the rotary compressor can be further improved; and service life of the rotary compressor can be greatly prolonged.

Description

Slide plate of rotary compressor and preparation method thereof

Technical field

The present invention relates to a kind of rotary compressor, particularly a kind of slide plate and preparation method thereof of rotary compressor.

Background technique

Rotary compressor because of its have that efficiency is high, volume is little, lightweight and widely applied, slide plate is the important spare part that pressure rotates contracting machine, the load p that pressure difference produces need be born in slide plate both sides, and need be close to the piston in rotary compressor, therefore slide plate both sides and very easily wearing and tearing with piston contact part, need better sliding capability, fatigue resistance and wear resistance.

Slide plate is generally be made up of stainless steel or Rapid Tool Steel, stainless steel is all difficult to meet the job requirement of compressor if do not carried out its hardness of Nitrizing Treatment and wear resistance, in order to improve slide plate hardness, wear resistance and corrosion resistance, need to carry out large quantity research to slide plate material, and propose corresponding making method.

Chinese patent literature CN 1424510A discloses a kind of manufacture method of compressor sliding blade on June 18th, 2003, mainly comprise the following steps: (1) selects materials: select following stainless steel, by weight percentage: C:0.95-1.2, Si are less than 1.00, P and are less than 0.04, S is less than 0.03, Mn is less than 1.00, Cr:16.0-18.0, and Mo is less than 0.75, Ni is less than 0.60, and surplus is Fe and impurity thereof; (2) cut, formalize: cut out slide plate according to the shape wire cutting method of slide plate, then mill out groove with milling cutter; (3) vacuum heat treatment; (4) grinding, polishing: carry out grinding, polishing respectively according to six faces of slide plate; (5) gas nitriding: the slide plate after grinding, polishing is carried out ammonia nitriding; (6) grinding: the slide plate after nitriding is ground to surface again and meets the requirements.

The steel adopting said method to need are confined to Rapid Tool Steel and high carbon stainless steel, these materials are not easy to obtain, price is higher, limit slide plate to apply further, and manufacturing procedure is many, Nitrizing Treatment need be carried out, the material scrap thing in preliminary working stage is many, causes the wasting of resources, and brings high risks to environment

Summary of the invention

Object of the present invention aims to provide slide plate of the rotary compressor that a kind of technique is simple, flexible operation, fabricating cost are low, hardness is high, intensity is high, toughness is high, dimensional accuracy is high, applied widely and preparation method thereof, to overcome deficiency of the prior art.

The slide plate of a kind of rotary compressor designed by this object, it is characterized in that slide plate is take Fe as matrix, and dispersed network phase is the ceramic-metal composite of stupalith and alloy material, and the component of slide plate is as follows by weight percentage: C 0.2 ~ 1%; Ni 1 ~ 8%; Mo 1 ~ 13%; Cr 1 ~ 12%; Pottery 5% ~ 30%; Mn 0.5 ~ 17%; Cu 0 ~ 10%; Remainder is Fe and inevitable impurity.

Described pottery is more than one in aluminium oxide, silica, zirconium oxide and mullite.

The particle diameter of described pottery is not less than 200 orders.

The component of described slide plate also comprises Si, and Si accounts for 0.1 ~ 10% of the gross weight of slide plate.

A making method for the slide plate of rotary compressor, is characterized in that comprising the following steps:

Step a, first prepares burden in above-mentioned component ratio, then through ball milling evenly and obtain mixed-powder after drying,

Step b, loads mixed-powder in mould, obtains just base after hot-forming,

Step c, obtains blank after being sintered by first base under ammonia decomposes atmosphere,

Steps d, carries out finishing by after blank deburring, and arrives the dimensional accuracy of slide plate requirement.

The present invention does not need, through prior heat treatment and Nitrizing Treatment, just can reach the requirement of high hardness, high strength, high tenacity, high dimensional accuracy, simplify production technology; The slide plate finished product obtained, there is micro-pore, this micro-pore has the function of lubrication oil, effectively can reduce the friction factor of slide plate, even self-lubricating function can be played in oil starvation situation, thus improve the operational reliability of rotary compressor further, and extend the working life of rotary compressor greatly;

Manufacturing process of the present invention is simple, is that near-net-shape is produced, can reduces equipment addition and environmental pollution, thus cut down finished cost.Raw material of the present invention is that China is rich in resource, with low cost.

Slide plate in the present invention had both had the impact toughness of metallic material, had again the high hardness of stupalith and the feature of high wear resistance.

In sum, the present invention have that technique is simple, flexible operation, fabricating cost are low, hardness is high, intensity is high, toughness is high, dimensional accuracy is high, applied widely

Accompanying drawing explanation

Fig. 1 is the perspective view of one embodiment of the invention.

Embodiment

Below in conjunction with drawings and Examples, the invention will be further described.

The slide plate of this rotary compressor, slide plate take Fe as matrix, and dispersed network phase is the ceramic-metal composite of stupalith and alloy material, and the component of slide plate is as follows by weight percentage: C 0.2 ~ 1%; Ni 1 ~ 8%; Mo 1 ~ 13%; Cr 1 ~ 12%; Pottery 5% ~ 30%; Mn 0.5 ~ 17%; Cu0 ~ 10%; Remainder is Fe and inevitable impurity.

Described pottery is more than one in aluminium oxide, silica, zirconium oxide and mullite.

The particle diameter of described pottery is not less than 200 orders.

The component of described slide plate also comprises Si, and Si accounts for 0.1 ~ 10% of the gross weight of slide plate.

A making method for the slide plate of rotary compressor, is characterized in that comprising the following steps:

Step a, first prepares burden in above-mentioned component ratio, then through ball milling evenly and obtain mixed-powder after drying,

Step b, loads mixed-powder in mould, obtains just base after hot-forming,

Step c, obtains blank after being sintered by first base under ammonia decomposes atmosphere,

Steps d, carries out finishing by after blank deburring, and arrives the dimensional accuracy of slide plate requirement.

Above-mentioned step performs according to the sintering process of powder metallurgy substantially.

First embodiment

During practical operation, (1) is first chosen: C 0.8%; Ni 2%; Mo 2%; Cr 2.5%; Al ₂o ₃20%; Cu 1.5%; Mn 1.8%; Si 1.8%; Remainder is Fe and inevitable impurity S 0.09%, then puts in pebble mill by aforesaid component, through ball milling evenly and obtain mixed-powder after drying,

(2) compacting just base: will load in mould after mixed-powder and 5% adhesive mixing and stirring, obtain just base after hot-forming,

(3) sinter: after being sintered under ammonia decomposes atmosphere by first base, obtain blank; Sintering temperature is 1200 ± 5 DEG C, and sintering time is 2 ± 0.5h, and molding pressure is 38MPa;

(4) finishing: carry out finishing by after blank deburring, and arrive the dimensional accuracy required by slide plate.

After above-mentioned steps, the slide plate with stern notch as shown in Figure 1 can be obtained, now, only need carry out two-sided mill to slide plate and R4 processes.

Mechanical property and the frictional behaviour of the slide plate obtained by stainless steel 9Cr18 traditional with employing for the slide plate adopting technique scheme to obtain contrast, and obtain following result.

Material	Hardness HRC	Resistance to flexure (σ av) MPa	Friction factor
				The utility model material	64.5	1300	0.075
Stainless steel (9Cr18)	65	500	0.090

Obviously can draw from upper table, adopt the slide plate that technological scheme provided by the invention obtains, its various performance parameter can meet rotary compressor slide plate demand.

Second embodiment

During practical operation, (1) is first chosen: C 0.4%; Ni 2%; Mo 3%; Cr 3%; Al ₂o ₃20%; Mullite 5%; Cu 1%; Mn 2%; Si 1.5%; Remainder is Fe and inevitable impurity S 0.09%, then puts in pebble mill by aforesaid component, through ball milling evenly and obtain mixed-powder after drying.

All the other are not stated part and see the first embodiment, no longer repeat.

3rd embodiment

During practical operation, (1) is first chosen: C 0.8%; Ni 2%; Mo 1.5%; Cr 2%; SiO ₂10%; Al ₂o ₃15%; Cu 1.5%; Mn 1.5%; Si 1.8%; Remainder is Fe and inevitable impurity S 0.09%, then puts in pebble mill by aforesaid component, through ball milling evenly and obtain mixed-powder after drying.

All the other are not stated part and see the first embodiment, no longer repeat.

Claims (3)

1. a slide plate for rotary compressor, it is characterized in that slide plate take Fe as matrix, dispersed network phase is the ceramic-metal composite of stupalith and alloy material, and the component of slide plate is as follows by weight percentage: C 0.2 ~ 1%; Ni 1 ~ 8%; Mo1 ~ 13%; Cr 1 ~ 12%; Pottery 5 ~ 30%; Mn 0.5 ~ 17%; Cu 0 ~ 10%; Remainder is Fe and inevitable impurity,

Wherein, described pottery is more than one in aluminium oxide, silica, zirconium oxide and mullite,

The particle diameter of described pottery is not less than 200 orders.

2. the slide plate of rotary compressor according to claim 1, it is characterized in that the component of described slide plate also comprises Si, Si accounts for 0.1 ~ 10% of the gross weight of slide plate.

3. a making method for the slide plate of rotary compressor as claimed in claim 1, is characterized in that comprising the following steps:

Step a, first prepares burden in above-mentioned component ratio, then through ball milling evenly and obtain mixed-powder after drying,

Step b, loads mixed-powder in mould, obtains just base after hot-forming,

Step c, obtains blank after being sintered by first base under ammonia decomposes atmosphere,

Steps d, carries out finishing by after blank deburring, and reaches the dimensional accuracy of slide plate requirement.