CN103667619B - The sub-temperature quenching process of Cr5MoV cold work die steel - Google Patents
The sub-temperature quenching process of Cr5MoV cold work die steel Download PDFInfo
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- CN103667619B CN103667619B CN201310694980.5A CN201310694980A CN103667619B CN 103667619 B CN103667619 B CN 103667619B CN 201310694980 A CN201310694980 A CN 201310694980A CN 103667619 B CN103667619 B CN 103667619B
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- 238000010791 quenching Methods 0.000 title claims abstract description 33
- 230000000171 quenching effect Effects 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005496 tempering Methods 0.000 claims abstract description 16
- 238000002791 soaking Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 abstract description 16
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000010792 warming Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 239000003610 charcoal Substances 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000005275 alloying Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention discloses a kind of sub-temperature quenching process of Cr5MoV cold work die steel, which is characterized in that including step specific as follows：a）Cr5MoV steel is heated to 680 ± 10 DEG C, keeps the temperature 2-3 hours at the same temperature；b）Then Cr5MoV steel is heated to 925 ± 10 DEG C again, keeps the temperature 30-40min at the same temperature, then carry out oil quenching；C) it is tempered rapidly after oil quenching, soaking time 2-3 hours.Then the present invention carries out oil quenching in the temperature range of slightly below hardening heat by first being preheated before quenching in specific temperature section during Cr5MoV Heat-Treatment of Steel, then tempering in time.With this new process, the hardness of material due to Cr5MoV steel carried out before being warming up to austenitizing the long period preheating thus austenitizing it is uniform, hardness also increases after quenching, and strength of materials etc. is also improved, and eliminates material in the hardening crack phenomenon of hot procedure.
Description
Technical field
The present invention relates to a kind of hot-working methods of cold-working mold, belong to steel technical field of heat treatment.
Background technique
Cr5MoV steel is a kind of cold work die steel, the higher hardness of the requirement of this material and preferable comprehensive
Energy.Since alloying element content is higher, and containing elements such as Mo, in mold pressing process, the biggish material of volume has geometry
The position of shape mutation is easy hardening crack in high temperature quenching process.Even if such case changes mold shape sometimes, design is also difficult to
It avoids, and mold since a large amount of processing have been carried out, then brings the damage of material and recruitment once cracked with regard to unrepairable
It loses, especially it is very big once to scrap economic loss for large mold.
Intercritical hardening refers to be quenched in the temperature range of the slightly below lower limit of material hardening heat, in this section temperature
Degree quenching, the high temperature grain coarsening phenomenon of material is relatively small, and the transformation stress in cooling procedure is also relatively small.Thus material
The tendency that hardening crack occurs just is greatly reduced compared to traditional handicraft.If carrying out appropriate pre- thermal technology in specific temperature section before quenching
Sequence, then material can also realize austenitizing well between sub- warm area, so that high hardness equally can be obtained in quenching process, and
Comprehensive performance is more preferable.
Summary of the invention
The present invention provides a kind of heat treatment of Cr5MoV cold work die steel with high rigidity and favorable comprehensive mechanical property
Technique.
The technical solution adopted by the present invention is as follows：
A kind of sub-temperature quenching process of Cr5MoV cold work die steel, which is characterized in that including step specific as follows：a）It will
Cr5MoV steel is heated to 680 ± 10 DEG C, preferably 680 DEG C, keeps the temperature 2-3 hours at the same temperature；b）Then again by Cr5MoV steel
925 ± 10 DEG C, preferably 925 DEG C are heated to, keep the temperature 30-40min at the same temperature, then carry out oil quenching；C) after oil quenching rapidly
It is tempered, soaking time 2-3 hours.
Tempering temperature is 200-400 DEG C in step c).
By 680 DEG C of preheatings and 925 DEG C of intercritical hardenings, the hardness of material is slightly improved compared to traditional handicraft, the strength of materials
Improved, and no cracked, has prevented to execute the cracking phenomena for being possible to occur by traditional handicraft completely.It improves
The hot-working quality and performance of this material.
By first being preheated before quenching in specific temperature section during Cr5MoV Heat-Treatment of Steel, then slightly
Temperature range lower than hardening heat carries out oil quenching, then tempering in time.With this new process, the hardness of material is due to Cr5MoV
Steel carried out before being warming up to austenitizing the long period preheating thus austenitizing it is uniform, hardness is also mentioned after quenching
Height, strength of materials etc. are also improved, and eliminate material in the hardening crack phenomenon of hot procedure.
Specific embodiment
Below by example, the present invention is further described, limits its object is to more fully understand the contents of the present invention
Protection scope of the present invention processed.
Embodiment 1
a）The Cr5MoV steel surface that diameter is 30mm is coated into carbon dust and is packed into electric furnace, or is used after Cr5MoV steel is packed into electric furnace
Charcoal covering.
b）Electric furnace is heated to 680 DEG C, and keeps the temperature 2 hours.
c）Then electric furnace is heated to 925 DEG C again.
d）Electric furnace is kept the temperature 30 minutes at 925 DEG C, then carries out oil quenching.
It will be tempered rapidly after sample after quenching, tempering temperature is 200 DEG C, tempering time 2 hours.
Product is sampled, hardness, the measurement such as tensile strength and wear-resisting property are carried out.It is tested fruit and is shown in Table 1.
Embodiment 2
a）The Cr5MoV steel surface that diameter is 30mm is coated into carbon dust and is packed into electric furnace, or is used after Cr5MoV steel is packed into electric furnace
Charcoal covering.
b）Electric furnace is heated to 680 DEG C, and keeps the temperature 2 hours.
c）Then electric furnace is heated to 925 DEG C again.
d）Electric furnace is kept the temperature 30 minutes at 925 DEG C, then carries out oil quenching.
It will be tempered rapidly after sample after quenching, tempering temperature is 400 DEG C, tempering time 2 hours.
Product is sampled, hardness, the measurement such as tensile strength and wear-resisting property are carried out.Its test result is shown in Table 1.
Embodiment 3
a）The Cr5MoV steel surface that diameter is 30mm is coated into carbon dust and is packed into electric furnace, or is used after Cr5MoV steel is packed into electric furnace
Charcoal covering.
b）Electric furnace is heated to 690 DEG C, and keeps the temperature 2 hours.
c）Then electric furnace is heated to 935 DEG C again.
d）Electric furnace is kept the temperature 30 minutes at 935 DEG C, then carries out oil quenching.
It will be tempered rapidly after sample after quenching, tempering temperature is 200 DEG C, tempering time 2 hours.
Product is sampled, hardness, the measurement such as tensile strength and wear-resisting property are carried out.Its test result is shown in Table 1.
Embodiment 4
a）The Cr5MoV steel surface that diameter is 30mm is coated into carbon dust and is packed into electric furnace, or is used after Cr5MoV steel is packed into electric furnace
Charcoal covering.
b）Electric furnace is heated to 670 DEG C, and keeps the temperature 2 hours.
c）Then electric furnace is heated to 915 DEG C again.
d）Electric furnace is kept the temperature 30 minutes at 915 DEG C, then carries out oil quenching.
It will be tempered rapidly after sample after quenching, tempering temperature is 200 DEG C, tempering time 2 hours.
Reference examples 1
a）The Cr5MoV steel surface that diameter is 30mm is coated into carbon dust and is packed into electric furnace, or is used after Cr5MoV steel is packed into electric furnace
Charcoal covering.
b）Then electric furnace is heated to 965 DEG C again.
d）Electric furnace is kept the temperature 30 minutes at 965 DEG C, then carries out oil quenching.
E) it will be tempered rapidly after sample after quenching, tempering temperature is 200 DEG C, tempering time 2 hours.
Product is sampled, hardness, the measurement such as tensile strength and wear-resisting property are carried out.Its test result is shown in Table 1.
Reference examples 2
a）The Cr5MoV steel surface that diameter is 30mm is coated into carbon dust and is packed into electric furnace, or is used after Cr5MoV steel is packed into electric furnace
Charcoal covering.
b）Then electric furnace is heated to 965 DEG C again.
d）Electric furnace is kept the temperature 30 minutes at 965 DEG C, then carries out oil quenching.
E) it will be tempered rapidly after sample after quenching, tempering temperature is 400 DEG C, tempering time 2 hours.
Product is sampled, hardness, the measurement such as tensile strength and wear-resisting property are carried out.Its test result is shown in Table 1.
1. table 1
By the test data of table 1 as it can be seen that the present invention passes through new heat treatment process, it will be apparent that improve the power of Cr5MoV steel
Performance is learned, intensity and moulding are improved, and wearability is also obviously improved.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to disclosed in the embodiment
Content.So all do not depart from the equivalent or modification completed under principles of this disclosure, the model that the present invention protects is both fallen within
It encloses.
Claims (1)
1. a kind of sub-temperature quenching process of Cr5MoV cold work die steel, which is characterized in that including step specific as follows：A) will
Cr5MoV steel is heated to 680 DEG C, keeps the temperature 2-3 hours at the same temperature；B) Cr5MoV steel is then heated to 925 DEG C again,
30-40min is kept the temperature under same temperature, then carries out oil quenching；C) it being tempered rapidly after oil quenching, tempering temperature is 200-400 DEG C,
Soaking time 2-3 hours.
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| CN201310694980.5A CN103667619B (en) | 2013-12-16 | 2013-12-16 | The sub-temperature quenching process of Cr5MoV cold work die steel |
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| CN201310694980.5A CN103667619B (en) | 2013-12-16 | 2013-12-16 | The sub-temperature quenching process of Cr5MoV cold work die steel |
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| CN103667619A CN103667619A (en) | 2014-03-26 |
| CN103667619B true CN103667619B (en) | 2018-11-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107739783A (en) * | 2017-11-28 | 2018-02-27 | 湖北工程职业学院 | A kind of heat treatment quenching process of high carbon and chromium tool steel |
| CN113462856B (en) * | 2021-07-02 | 2022-06-21 | 太原理工大学 | Heat treatment method for improving toughness of steel casting of middle trough ledge of scraper conveyor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0257632A (en) * | 1988-08-24 | 1990-02-27 | Nippon Steel Corp | Manufacture of die steel excellent in thermal fatigue characteristic |
| US5505798A (en) * | 1994-06-22 | 1996-04-09 | Jerry L. Nelson | Method of producing a tool or die steel |
| CN1122840A (en) * | 1994-11-05 | 1996-05-22 | 云南工业大学 | Micro-alloying and high toughness cold working die steel |
| CN101717896A (en) * | 2009-12-22 | 2010-06-02 | 上海大学 | High strength and toughness cold working die steel and preparation method thereof |
| CN102719656A (en) * | 2012-05-08 | 2012-10-10 | 无锡宏达热处理锻造有限公司 | Heat treatment process for preventing cold work die steel wire cutting cracking |
-
2013
- 2013-12-16 CN CN201310694980.5A patent/CN103667619B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0257632A (en) * | 1988-08-24 | 1990-02-27 | Nippon Steel Corp | Manufacture of die steel excellent in thermal fatigue characteristic |
| US5505798A (en) * | 1994-06-22 | 1996-04-09 | Jerry L. Nelson | Method of producing a tool or die steel |
| CN1122840A (en) * | 1994-11-05 | 1996-05-22 | 云南工业大学 | Micro-alloying and high toughness cold working die steel |
| CN101717896A (en) * | 2009-12-22 | 2010-06-02 | 上海大学 | High strength and toughness cold working die steel and preparation method thereof |
| CN102719656A (en) * | 2012-05-08 | 2012-10-10 | 无锡宏达热处理锻造有限公司 | Heat treatment process for preventing cold work die steel wire cutting cracking |
Non-Patent Citations (2)
| Title |
|---|
| 亚温淬火在模具零件上的应用;赵旭平 等;《国外金属热处理》;20020215;第23卷(第1期);第20-21页 * |
| 亚温淬火的实例分析;邓小君 等;《水利电力机械》;20010330;第23卷(第1期);第39页左栏第2.1-2.3部分 * |
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| CN103667619A (en) | 2014-03-26 |
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