A kind of heat- treated steel alloy
Technical field
The present invention relates to steel material technical field, more particularly to a kind of heat- treated steel alloy.
Background technology
Existing more than the 100 years history of steel alloy.It is industrially more about later half in 19th century using alloy steel products
Phase.At that time because the output and usage amount of steel constantly increase, machinery manufacturing industry need solve steel processing problem of cutting, 1868
Year, the uncommon spy of forces of Britain invented the Mushet steel that composition is 2.5%Mn-7%W, and cutting speed is brought up into 5 ms/min.With business
Industry and the development of transport, span is built on Mississippi as 158.5 with chromium steel (1.5-2.0%Cr) in the U.S. within 1870
The bridge of rice;Difficulty occurs during due to tooling member, later, some industrial countries use nickel steel instead(3.5%Ni)Build large span
Bridge.At the same time, nickel steel is also used to build warship by some countries.With the development of engineering technology, it is desirable to accelerate machinery
Velocity of rotation, occur high carbon chromium roller bearing steel in West Europe within 1901.18W-4Cr-1V types are developed again within 1910
High-speed tool steel, cutting speed is further brought up to 30 ms/min.It can be seen that the appearance and development of steel alloy, are to have adapted to society
The requirement of productivity dynamics, is particularly and the needs of machine-building, communications and transportation and war industry are inseparable.Existing steel closes
Golden intensity deficiency, malleability is low, and without good endurance quality, mechanical performance has much room for improvement, and is this it is proposed that coming a kind of
Heat- treated steel alloy.
The content of the invention
Based on technical problem existing for background technology, the present invention proposes a kind of heat- treated steel alloy.
A kind of heat- treated steel alloy proposed by the present invention, include the raw material of following percentage by weight:
C:1.2%-1.5%;Al:0.12%-0.16%;Mo:0.008%-0.018%;Mn:0.5%-1.0%;B:
0.5%-1.2%;Ni:0.1%-1.4%;Si:3.55%-4.15%;Ti:0.004%-0.01%;V:0.1%-4.2%;
W:0.005%-0.01%;Cr:0.5%-4.2%;Nb:0.05%-0.15%;Re:0.05%-0.16%;Be:0%-
0.24%;Surplus is Fe.
Preferably, the raw material of following percentage by weight is included:
C:1.3%-1.4%;Al:0.13%-0.15%;Mo:0.009%-0.017%;Mn:0.7%-0.8%;B:
0.7%-1.0%;Ni:0.6%-0.9%;Si:3.8%-4.0%;Ti:0.006%-0.008%;V:0.8%-3.5%;W:
0.007%-0.009%;Cr:0.8%-3.6%;Nb:0.07%-0.13%;Re:0.08%-0.13%;Be:0.12%-
0.18%;Surplus is Fe.
Preferably, the raw material of following percentage by weight is included:
C:1.35%;Al:0.14%;Mo:0.013%;Mn:0.75%;B:0.85%;Ni:0.8%;Si:3.9%;
Ti:0.007%;V:2.5%;W:0.008%;Cr:2.2%;Nb:0.11%;Re:0.11%;Be:0.15%;Surplus is Fe.
Preferably, the preparation method of the steel alloy comprises the following steps:
S1, raw material C is weighed according to deal percentage:1.2%-1.5%;Al:0.12%-0.16%;Mo:0.008%-
0.018%;Mn:0.5%-1.0%;B:0.5%-1.2%;Ni:0.1%-1.4%;Si:3.55%-4.15%;Ti:
0.004%-0.01%;V:0.1%-4.2%;W:0.005%-0.01%;Cr:0.5%-4.2%;Nb:0.05%-
0.15%;Re:0.05%-0.16%;Be:0%-0.24%;Surplus is Fe;Above-mentioned raw materials are sequentially added in smelting furnace, melted
It is 1000-1600 DEG C to refine temperature, continues 4-6min, obtains blank;
S2, blank is heat-treated, process of thermal treatment parameter is:Temperature is heated to 100 DEG C/h of programming rate
250-350 DEG C, then it is heated to 1050-1150 DEG C with 120 DEG C/h of programming rate, after soaking time 3-5h, transition temperature 550-
650 DEG C, soaking time 10-15min, obtain prefabrication;
S3, the prefabrication in S2 is incubated 1-2h at a temperature of 200-300 DEG C, air cooling, obtains finished product, and will be into product examine
Test packaging and storage.
Preferably, in the S2, blank is heat-treated, process of thermal treatment parameter is:With 100 DEG C/h of programming rate
It is heated to 300 DEG C of temperature, then 1100 DEG C is heated to 120 DEG C/h of programming rate, after soaking time 4h, transition temperature is 600 DEG C,
Soaking time 12min, obtains prefabrication.
In the present invention, by carrying out reasonable selection to the chemical element of steel alloy, the combination matching of each element, knot are optimized
The selection of chemical element is closed, when preparing steel alloy, melting is first passed through and obtains blank, be heat-treated, optimize heat treatment process
In relevant parameter so that alloy structure performance enhancement, its intensity and malleability increase, while have good durability energy, this
The composition proportion of invention is reasonable, and preparation technology is simple, and the steel alloy of preparation has good combination property, and endurance quality improves,
It is adapted to promote.
Embodiment
The present invention is made with reference to specific embodiment further to explain.
Embodiment one
A kind of heat- treated steel alloy proposed by the present invention, include the raw material of following percentage by weight:
C:1.2%;Al:0.12%;Mo:0.008%;Mn:0.5%;B:0.5%;Ni:0.1%;Si:3.55%;Ti:
0.004%;V:0.1%;W:0.005%;Cr:0.5%;Nb:0.05%;Re:0.05%;Surplus is Fe.
Its preparation method comprises the following steps:
S1, each raw material is weighed according to deal percentage, above-mentioned raw materials are sequentially added in smelting furnace, smelting temperature 1000
DEG C, continue 4min, obtain blank;
S2, blank is heat-treated, process of thermal treatment parameter is:Temperature 250 is heated to 100 DEG C/h of programming rate
DEG C, then it is heated to 1050 DEG C with 120 DEG C/h of programming rate, after soaking time 3h, transition temperature is 550 DEG C, soaking time
10min, obtain prefabrication;
S3, the prefabrication in S2 is incubated 1h at a temperature of 200 DEG C, air cooling, obtains finished product, and product inspection is packed
Storage.
Embodiment two
A kind of heat- treated steel alloy proposed by the present invention, include the raw material of following percentage by weight:
C:1.3%;Al:0.13%;Mo:0.009%;Mn:0.7%;B:0.7%;Ni:0.6%;Si:3.8%;Ti:
0.006%;V:0.8%;W:0.007%;Cr:0.8%;Nb:0.07%;Re:0.08%;Be:0.12%;Surplus is Fe.
Its preparation method comprises the following steps:
S1, each raw material is weighed according to deal percentage, above-mentioned raw materials are sequentially added in smelting furnace, smelting temperature 1100
DEG C, continue 4.5min, obtain blank;
S2, blank is heat-treated, process of thermal treatment parameter is:Temperature 275 is heated to 100 DEG C/h of programming rate
DEG C, then it is heated to 1075 DEG C with 120 DEG C/h of programming rate, after soaking time 3.5h, transition temperature is 575 DEG C, soaking time
11min, obtain prefabrication;
S3, the prefabrication in S2 being incubated 1.2h at a temperature of 225 DEG C, air cooling obtains finished product, and by product inspection bag
Load storehouse.
Embodiment three
A kind of heat- treated steel alloy proposed by the present invention, include the raw material of following percentage by weight:
C:1.35%;Al:0.14%;Mo:0.013%;Mn:0.75%;B:0.85%;Ni:0.8%;Si:3.9%;
Ti:0.007%;V:2.5%;W:0.008%;Cr:2.2%;Nb:0.11%;Re:0.11%;Be:0.15%;Surplus is Fe.
Its preparation method comprises the following steps:
S1, each raw material is weighed according to deal percentage, above-mentioned raw materials are sequentially added in smelting furnace, smelting temperature 1300
DEG C, continue 5min, obtain blank;
S2, blank is heat-treated, process of thermal treatment parameter is:Temperature 300 is heated to 100 DEG C/h of programming rate
DEG C, then it is heated to 1100 DEG C with 120 DEG C/h of programming rate, after soaking time 4h, transition temperature is 600 DEG C, soaking time
14min, obtain prefabrication;
S3, the prefabrication in S2 being incubated 1.5h at a temperature of 250 DEG C, air cooling obtains finished product, and by product inspection bag
Load storehouse.
Example IV
A kind of heat- treated steel alloy proposed by the present invention, include the raw material of following percentage by weight:
C:1.4%;Al:0.15%;Mo:0.017%;Mn:0.8%;B:1.0%;Ni:0.9%;Si:4.0%;
Ti:0.008%;V:3.5%;W:0.009%;Cr:3.6%;Nb:0.13%;Re:0.13%;Be:0.18%;Surplus is
Fe。
Its preparation method comprises the following steps:
S1, each raw material is weighed according to deal percentage, above-mentioned raw materials are sequentially added in smelting furnace, smelting temperature 1500
DEG C, continue 5.5min, obtain blank;
S2, blank is heat-treated, process of thermal treatment parameter is:Temperature 325 is heated to 100 DEG C/h of programming rate
DEG C, then it is heated to 1125 DEG C with 120 DEG C/h of programming rate, after soaking time 4.5h, transition temperature is 625 DEG C, soaking time
14min, obtain prefabrication;
S3, the prefabrication in S2 being incubated 1.8h at a temperature of 280 DEG C, air cooling obtains finished product, and by product inspection bag
Load storehouse.
Embodiment five
A kind of heat- treated steel alloy proposed by the present invention, include the raw material of following percentage by weight:
C:1.5%;Al:0.16%;Mo:0.018%;Mn:1.0%;B:1.2%;Ni:1.4%;Si:4.15%;Ti:
0.01%;V:4.2%;W:0.01%;Cr:4.2%;Nb:0.15%;Re:0.16%;Be:0.24%;Surplus is Fe.
Its preparation method comprises the following steps:
S1, each raw material is weighed according to deal percentage, above-mentioned raw materials are sequentially added in smelting furnace, smelting temperature 1600
DEG C, continue 6min, obtain blank;
S2, blank is heat-treated, process of thermal treatment parameter is:Temperature 350 is heated to 100 DEG C/h of programming rate
DEG C, then it is heated to 1150 DEG C with 120 DEG C/h of programming rate, after soaking time 5h, transition temperature is 650 DEG C, soaking time
15min, obtain prefabrication;
S3, the prefabrication in S2 is incubated 2h at a temperature of 300 DEG C, air cooling, obtains finished product, and product inspection is packed
Storage.
In embodiment 1-5, every mechanical performance of steel alloy made from test, as a result such as following table:
|
Tensile strength(MPa) |
Elongation percentage(%) |
Embodiment one |
1373 |
19 |
Embodiment two |
1391 |
17 |
Embodiment three |
1421 |
21 |
Example IV |
1375 |
19 |
Embodiment five |
1385 |
18 |
As seen from the above table, steel alloy of the invention has good tensile strength and elongation percentage, combination property height.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.