Cold Work Tool Steel

Features of Cold Work Tool Steel

• 1 The cold work tool steels fall into three main categories: Oil Hardening, Air Hardening, High-carbon-chromium / D-type.
  
   
  The group is characterized by its high wear resistance, high hardenability and average heat softening resistance and toughness. Oil quenching and air hardening are used to help reduce distortion and stress, which is common in the faster ‘water quenching’ method. These steels also contain more alloying elements than the water quenching class.
   
  The steels’ hardenability is increased by the alloys, thus lessening the need for such a severe quenching method. As a result, the cold work tool steel group is less likely to crack than other groups.
   
  Their high surface-hardness means they are excellent steels for knife blades. They are also commonly used in production of large parts and parts that do not require heavy distortion during hardening.
   
  Oil Hardening Steel is classified with the prefix ‘O’, and typically have high machinability. The steel is most often used for knives and forks. It can be hardened to approximately 57 to 61 HRC.
  
   
  The high chromium content of Air Hardening Steels causes them to resist distortion during heat treatment, and their higher alloy content causes them to harden in air. They have good machinability and a balance of toughness and wear resistance. They are classified by the ‘A’ prefix (A1 – A10).
   
  
  
  
  High carbon-chromium or ‘D-type’ steel can maintain their hardness in temperatures rising to about 425°C, and has a chromium content of about 10 – 13%. Often considered stainless or semi-stainless, d-type steel actually has a limited corrosion resistance. This group of cold work tool steel is commonly used for drawing dies, die-casting die blocks and forging dies.
  
  
  COLD WORK STEEL冷作模具钢

  编号 NO:	近似钢号					用途	Application
  	中国GB	美国AISI	德国DIN	日本JIS	外企 Foreign Enterprise
  1	Cr12Mo1V1	D2	1.2379	SKD11		量产冲压模，剪切刀模，搓丝模、瓷制品模等	For pounch mold,knife mold,screw mold,chinawae mold
  2	*Cr12Mo1V			SKD10		量产冲压模，剪切刀模，搓丝模、瓷制品模等	For pounch mold,knife mold,screw mold,chinawae mold
  3	Cr12MoV	D5	1.2601			量产冲压模，剪切刀模，搓丝模、瓷制品模等	For pounch mold,knife mold,screw mold,chinawae mold
  4	Cr12	D3	1.2080	SKD1		耐磨挤压工具与导向板等	For wear-resisting press tool and guide palte etc
  5	*Cr8Mo2WVSi				ASSABBB	类于D2,但韧性好，更适宜线切加工	Similer D2,better toughness.
  6	Cr12W	D6	1.2436			冲压模、挤压模、拉伸模	For pounch mold,press mold,mech mold
  7	*5Cr8Mo2VSi	A8	1.2631			耐磨薄刃剪切刀具、压铸配件等	For weat-resisting cutter with thin knife edge
  8	Cr5Mo1V	A2	1.2363			重载及形状复杂冲压模，剪切刀具	For pweat-resisting cutter with thin knife edge
  9	9CrWMn	O1	1.2510	SKS3	BOHLERK460	薄冲压模，手饰压模	For thin pounch mold,headgear mold
  10	*9Cr2MoV		1.2327		BOHLERK310	量刃具、冷轧辊、滚丝轮等	For cold rolling roller,thread wheel
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  编号 NO:	冷作模具钢化学成份(% ) Chemical composition										退火状态 硬度≤ Annealed Hardness	热处理温度(℃) Heal treatment temp		回火硬度 HRC Secondary hardness
  	C	Si	Mn	P≤	S≤	Cr	W	Mo	V			淬火  Hardening	回火 Tempering
  1	1.50	0.35	0.35	0.030	0.030	12.10	≤0.40	0.85	0.60		255	1010-1050	200 530	62-63
  2	1.50	0.35	0.50	0.030	0.030	12.00	—	0.75	0.35		255	1020-1040	160	62-63
  3	1.60	0.35	0.35	0.030	0.030	12.00	—	0.50	0.20		255	1020-1040	250	57-59
  4	2.10	0.35	0.35	0.030	0.030	12.40	—	—	—		255	950-980	200	62
  5	1.00	1.00	0.45	0.030	0.030	8.20	0.80	1.80	0.70		255	1010-1050	520	61-63
  6	2.20	0.90	0.40	0.030	0.030	12.50	≤0.90	—	—		255	1010-1100	530	54-61
  7	0.52	0.90	0.35	0.030	0.030	8.20	≤1.75	1.50	0.40		255	1010-1050	500	56
  8	1.00	0.40	0.75	0.030	0.030	5.10	—	1.10	0.30		255	940-960	200	60-63
  9	0.93	0.30	1.20	0.030	0.030	0.50	0.50	≤0.30	0.23		217	800-820	200	60-62
  10	1.95	0.35	0.50	0.030	0.030	1.90	—	0.25	0.18		255	830	200	62
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